./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/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_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/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_918b3f28-d289-49b0-bfb2-fd36d3462c79/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 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:51:49,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:51:49,960 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:51:49,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:51:49,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:51:49,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:51:49,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:51:49,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:51:49,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:51:49,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:51:49,995 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:51:49,995 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:51:49,996 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:51:49,998 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:51:49,998 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:51:49,998 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:51:49,999 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:51:49,999 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:51:49,999 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:51:49,999 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:51:50,000 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:51:50,001 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:51:50,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:51:50,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:51:50,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:51:50,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:51:50,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:51:50,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:51:50,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:51:50,004 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:51:50,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:51:50,004 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:51:50,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:51:50,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:51:50,005 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:51:50,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:51:50,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:51:50,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:51:50,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:51:50,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:51:50,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:51:50,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:51:50,008 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:51:50,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:51:50,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:51:50,009 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:51:50,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:51:50,009 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_918b3f28-d289-49b0-bfb2-fd36d3462c79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b [2024-11-09 05:51:50,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:51:50,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:51:50,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:51:50,356 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:51:50,357 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:51:50,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c Unable to find full path for "g++" [2024-11-09 05:51:52,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:51:52,557 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:51:52,558 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2024-11-09 05:51:52,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/data/929926191/eeba8c24d3a0434aa54431d1ed11ce3b/FLAG2b20fe9d4 [2024-11-09 05:51:52,587 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/data/929926191/eeba8c24d3a0434aa54431d1ed11ce3b [2024-11-09 05:51:52,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:51:52,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:51:52,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:51:52,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:51:52,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:51:52,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:51:52" (1/1) ... [2024-11-09 05:51:52,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3165e855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:52, skipping insertion in model container [2024-11-09 05:51:52,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:51:52" (1/1) ... [2024-11-09 05:51:52,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:51:52,983 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_918b3f28-d289-49b0-bfb2-fd36d3462c79/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c[950,963] [2024-11-09 05:51:52,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:51:53,000 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:51:53,019 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c[950,963] [2024-11-09 05:51:53,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:51:53,039 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:51:53,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53 WrapperNode [2024-11-09 05:51:53,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:51:53,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:51:53,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:51:53,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:51:53,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,077 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-09 05:51:53,077 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:51:53,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:51:53,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:51:53,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:51:53,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,087 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:51:53,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:51:53,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:51:53,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:51:53,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (1/1) ... [2024-11-09 05:51:53,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:51:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:51:53,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:51:53,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:51:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:51:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:51:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-09 05:51:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-09 05:51:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-09 05:51:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-09 05:51:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:51:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:51:53,269 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:51:53,271 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:51:53,448 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-09 05:51:53,448 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:51:53,478 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:51:53,479 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:51:53,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:51:53 BoogieIcfgContainer [2024-11-09 05:51:53,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:51:53,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:51:53,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:51:53,488 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:51:53,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:51:52" (1/3) ... [2024-11-09 05:51:53,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1292fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:51:53, skipping insertion in model container [2024-11-09 05:51:53,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:51:53" (2/3) ... [2024-11-09 05:51:53,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1292fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:51:53, skipping insertion in model container [2024-11-09 05:51:53,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:51:53" (3/3) ... [2024-11-09 05:51:53,493 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-1.c [2024-11-09 05:51:53,516 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:51:53,516 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:51:53,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:51:53,599 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;@39732371, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:51:53,600 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:51:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 05:51:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:51:53,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:53,617 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:51:53,618 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:53,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2024-11-09 05:51:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996098005] [2024-11-09 05:51:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:53,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:51:53,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:53,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996098005] [2024-11-09 05:51:53,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996098005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:51:53,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:51:53,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:51:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18776967] [2024-11-09 05:51:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:51:54,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:51:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:51:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:51:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:51:54,029 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:51:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:51:54,098 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-09 05:51:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:51:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-09 05:51:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:51:54,111 INFO L225 Difference]: With dead ends: 34 [2024-11-09 05:51:54,112 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 05:51:54,115 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 05:51:54,119 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:51:54,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:51:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 05:51:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 05:51:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 05:51:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-09 05:51:54,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-09 05:51:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:51:54,171 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-09 05:51:54,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:51:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-09 05:51:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 05:51:54,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:54,174 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:51:54,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:51:54,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:54,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2024-11-09 05:51:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:54,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775764521] [2024-11-09 05:51:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:51:54,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:54,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775764521] [2024-11-09 05:51:54,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775764521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:51:54,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:51:54,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:51:54,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023263411] [2024-11-09 05:51:54,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:51:54,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:51:54,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:51:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:51:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:51:54,286 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:51:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:51:54,315 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-09 05:51:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 05:51:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-09 05:51:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:51:54,317 INFO L225 Difference]: With dead ends: 32 [2024-11-09 05:51:54,318 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 05:51:54,318 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 05:51:54,320 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:51:54,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:51:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 05:51:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-09 05:51:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 05:51:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-09 05:51:54,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2024-11-09 05:51:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:51:54,331 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-09 05:51:54,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:51:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-09 05:51:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 05:51:54,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:54,334 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:51:54,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:51:54,334 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:54,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2024-11-09 05:51:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243418820] [2024-11-09 05:51:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:54,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:51:54,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:54,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243418820] [2024-11-09 05:51:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243418820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:51:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649844300] [2024-11-09 05:51:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:54,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:51:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:51:54,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:51:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:51:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:54,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:51:54,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:51:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:51:54,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:51:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:51:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649844300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:51:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1739315203] [2024-11-09 05:51:55,152 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:51:55,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:51:55,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:51:55,168 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:51:55,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:51:55,383 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 35 for LOIs [2024-11-09 05:51:55,507 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 35 for LOIs [2024-11-09 05:51:55,520 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:51:55,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1739315203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:51:55,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:51:55,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 7, 7] total 17 [2024-11-09 05:51:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479812611] [2024-11-09 05:51:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:51:55,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:51:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:51:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:51:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:51:55,926 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:51:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:51:56,102 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2024-11-09 05:51:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:51:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-11-09 05:51:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:51:56,106 INFO L225 Difference]: With dead ends: 68 [2024-11-09 05:51:56,107 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 05:51:56,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:51:56,112 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:51:56,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:51:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 05:51:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-09 05:51:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 05:51:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-09 05:51:56,143 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2024-11-09 05:51:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:51:56,144 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-09 05:51:56,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:51:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-09 05:51:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:51:56,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:56,150 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, 1, 1, 1, 1] [2024-11-09 05:51:56,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:51:56,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 05:51:56,351 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:56,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:56,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2024-11-09 05:51:56,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:56,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137158234] [2024-11-09 05:51:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:51:56,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137158234] [2024-11-09 05:51:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137158234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:51:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875125951] [2024-11-09 05:51:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:56,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:51:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:51:56,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:51:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:51:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:56,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:51:56,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:51:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 05:51:56,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:51:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:51:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875125951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:51:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1649468662] [2024-11-09 05:51:57,179 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:51:57,179 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:51:57,181 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 05:51:57,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:51:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-09 05:51:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871872181] [2024-11-09 05:51:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:51:57,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:51:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:51:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:51:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:51:57,189 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 05:51:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:51:57,508 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2024-11-09 05:51:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:51:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2024-11-09 05:51:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:51:57,513 INFO L225 Difference]: With dead ends: 85 [2024-11-09 05:51:57,513 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 05:51:57,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:51:57,518 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:51:57,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 161 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:51:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 05:51:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-09 05:51:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-09 05:51:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-09 05:51:57,550 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2024-11-09 05:51:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:51:57,551 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-09 05:51:57,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 05:51:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-09 05:51:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 05:51:57,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:57,556 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, 1, 1, 1, 1, 1] [2024-11-09 05:51:57,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:51:57,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 05:51:57,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:57,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2024-11-09 05:51:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:57,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742878140] [2024-11-09 05:51:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 05:51:58,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:58,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742878140] [2024-11-09 05:51:58,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742878140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:51:58,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066137237] [2024-11-09 05:51:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:51:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:51:58,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:51:58,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:51:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:58,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:51:58,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:51:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:51:58,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:51:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:51:58,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066137237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:51:58,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662293651] [2024-11-09 05:51:58,822 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:51:58,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:51:58,822 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 05:51:58,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:51:58,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-09 05:51:58,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755960113] [2024-11-09 05:51:58,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:51:58,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 05:51:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:51:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 05:51:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:51:58,830 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 05:51:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:51:59,419 INFO L93 Difference]: Finished difference Result 123 states and 210 transitions. [2024-11-09 05:51:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 05:51:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-09 05:51:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:51:59,422 INFO L225 Difference]: With dead ends: 123 [2024-11-09 05:51:59,422 INFO L226 Difference]: Without dead ends: 79 [2024-11-09 05:51:59,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:51:59,425 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:51:59,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 256 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:51:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-09 05:51:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-11-09 05:51:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-11-09 05:51:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 91 transitions. [2024-11-09 05:51:59,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 91 transitions. Word has length 36 [2024-11-09 05:51:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:51:59,445 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 91 transitions. [2024-11-09 05:51:59,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 05:51:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 91 transitions. [2024-11-09 05:51:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:51:59,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:51:59,447 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:51:59,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:51:59,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:51:59,648 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:51:59,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:51:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2024-11-09 05:51:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:51:59,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766628407] [2024-11-09 05:51:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:59,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:51:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:51:59,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:51:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766628407] [2024-11-09 05:51:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766628407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:51:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010787742] [2024-11-09 05:51:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:51:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:51:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:51:59,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:51:59,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:51:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:51:59,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 05:51:59,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:52:00,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:52:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010787742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718729052] [2024-11-09 05:52:00,732 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:00,732 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:00,733 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 05:52:00,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:00,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-09 05:52:00,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003015961] [2024-11-09 05:52:00,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:00,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 05:52:00,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 05:52:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:52:00,738 INFO L87 Difference]: Start difference. First operand 63 states and 91 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-09 05:52:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:01,063 INFO L93 Difference]: Finished difference Result 121 states and 210 transitions. [2024-11-09 05:52:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:52:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 50 [2024-11-09 05:52:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:01,067 INFO L225 Difference]: With dead ends: 121 [2024-11-09 05:52:01,067 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 05:52:01,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:52:01,070 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:01,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 135 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:52:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 05:52:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2024-11-09 05:52:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 14 states have call successors, (14), 5 states have call predecessors, (14), 11 states have return successors, (39), 17 states have call predecessors, (39), 14 states have call successors, (39) [2024-11-09 05:52:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-09 05:52:01,097 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 50 [2024-11-09 05:52:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:01,097 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-09 05:52:01,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-09 05:52:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-09 05:52:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 05:52:01,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:01,101 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:01,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:01,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:52:01,306 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:01,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1646169427, now seen corresponding path program 1 times [2024-11-09 05:52:01,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:01,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125308288] [2024-11-09 05:52:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:52:01,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125308288] [2024-11-09 05:52:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125308288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652449379] [2024-11-09 05:52:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:01,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:01,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:01,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:52:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:01,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:52:01,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 05:52:01,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 05:52:03,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652449379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:03,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107384062] [2024-11-09 05:52:03,113 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:03,113 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:03,113 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 05:52:03,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:03,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-09 05:52:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911816472] [2024-11-09 05:52:03,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:03,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:52:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:52:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:52:03,117 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2024-11-09 05:52:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:03,965 INFO L93 Difference]: Finished difference Result 206 states and 415 transitions. [2024-11-09 05:52:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 05:52:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) Word has length 79 [2024-11-09 05:52:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:03,969 INFO L225 Difference]: With dead ends: 206 [2024-11-09 05:52:03,969 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 05:52:03,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 05:52:03,972 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 82 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:03,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 418 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:52:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 05:52:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2024-11-09 05:52:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 19 states have call successors, (19), 8 states have call predecessors, (19), 15 states have return successors, (51), 23 states have call predecessors, (51), 19 states have call successors, (51) [2024-11-09 05:52:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 146 transitions. [2024-11-09 05:52:03,996 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 146 transitions. Word has length 79 [2024-11-09 05:52:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:03,996 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 146 transitions. [2024-11-09 05:52:03,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 23 states have internal predecessors, (72), 18 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (25), 10 states have call predecessors, (25), 18 states have call successors, (25) [2024-11-09 05:52:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 146 transitions. [2024-11-09 05:52:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-09 05:52:04,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:04,005 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 13, 13, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:04,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:04,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:52:04,209 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:04,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:04,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1748937429, now seen corresponding path program 2 times [2024-11-09 05:52:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:04,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333095194] [2024-11-09 05:52:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:04,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 57 proven. 208 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2024-11-09 05:52:04,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333095194] [2024-11-09 05:52:04,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333095194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:04,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075514869] [2024-11-09 05:52:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:52:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:04,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:04,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:52:04,771 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:52:04,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:52:04,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:52:04,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 319 proven. 3 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2024-11-09 05:52:04,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 248 proven. 5 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2024-11-09 05:52:05,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075514869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:05,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960806659] [2024-11-09 05:52:05,834 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:05,834 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:05,834 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 05:52:05,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2024-11-09 05:52:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885813536] [2024-11-09 05:52:05,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:05,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:52:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:52:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:52:05,840 INFO L87 Difference]: Start difference. First operand 100 states and 146 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-09 05:52:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:06,061 INFO L93 Difference]: Finished difference Result 190 states and 311 transitions. [2024-11-09 05:52:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:52:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 208 [2024-11-09 05:52:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:06,064 INFO L225 Difference]: With dead ends: 190 [2024-11-09 05:52:06,064 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 05:52:06,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 405 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-09 05:52:06,066 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:06,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:52:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 05:52:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2024-11-09 05:52:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 19 states have call successors, (19), 8 states have call predecessors, (19), 13 states have return successors, (43), 22 states have call predecessors, (43), 19 states have call successors, (43) [2024-11-09 05:52:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 135 transitions. [2024-11-09 05:52:06,090 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 135 transitions. Word has length 208 [2024-11-09 05:52:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:06,091 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 135 transitions. [2024-11-09 05:52:06,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 5 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-09 05:52:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 135 transitions. [2024-11-09 05:52:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 05:52:06,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:06,095 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:06,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:52:06,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:52:06,299 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:06,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1334835348, now seen corresponding path program 1 times [2024-11-09 05:52:06,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:06,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040527518] [2024-11-09 05:52:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2024-11-09 05:52:06,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:06,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040527518] [2024-11-09 05:52:06,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040527518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:06,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219464854] [2024-11-09 05:52:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:06,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:06,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:06,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:52:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:06,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:52:06,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-11-09 05:52:06,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 24 proven. 171 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-09 05:52:08,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219464854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:08,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778086432] [2024-11-09 05:52:08,571 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:08,571 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:08,572 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 05:52:08,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:08,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 15] total 21 [2024-11-09 05:52:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704910658] [2024-11-09 05:52:08,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:08,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:52:08,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:52:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-09 05:52:08,576 INFO L87 Difference]: Start difference. First operand 95 states and 135 transitions. Second operand has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 21 states have internal predecessors, (70), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) [2024-11-09 05:52:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:09,033 INFO L93 Difference]: Finished difference Result 149 states and 259 transitions. [2024-11-09 05:52:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 05:52:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 21 states have internal predecessors, (70), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) Word has length 119 [2024-11-09 05:52:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:09,043 INFO L225 Difference]: With dead ends: 149 [2024-11-09 05:52:09,044 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 05:52:09,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 222 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:52:09,046 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:09,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 149 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:52:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 05:52:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2024-11-09 05:52:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 72 states have internal predecessors, (81), 21 states have call successors, (21), 8 states have call predecessors, (21), 16 states have return successors, (54), 27 states have call predecessors, (54), 21 states have call successors, (54) [2024-11-09 05:52:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2024-11-09 05:52:09,137 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 119 [2024-11-09 05:52:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:09,138 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2024-11-09 05:52:09,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 21 states have internal predecessors, (70), 17 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) [2024-11-09 05:52:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2024-11-09 05:52:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2024-11-09 05:52:09,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:09,145 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 20, 20, 17, 17, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:09,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:52:09,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:52:09,350 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:09,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1972094229, now seen corresponding path program 1 times [2024-11-09 05:52:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883158037] [2024-11-09 05:52:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 98 proven. 593 refuted. 0 times theorem prover too weak. 1753 trivial. 0 not checked. [2024-11-09 05:52:10,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:10,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883158037] [2024-11-09 05:52:10,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883158037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:10,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352483386] [2024-11-09 05:52:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:10,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:10,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:10,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:10,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:52:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:10,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:52:10,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 98 proven. 593 refuted. 0 times theorem prover too weak. 1753 trivial. 0 not checked. [2024-11-09 05:52:10,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 98 proven. 617 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2024-11-09 05:52:13,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352483386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:13,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365265875] [2024-11-09 05:52:13,052 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:13,053 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:13,054 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 05:52:13,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2024-11-09 05:52:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130686408] [2024-11-09 05:52:13,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:13,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:52:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:52:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:52:13,062 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-09 05:52:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:13,397 INFO L93 Difference]: Finished difference Result 137 states and 214 transitions. [2024-11-09 05:52:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:52:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 295 [2024-11-09 05:52:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:13,401 INFO L225 Difference]: With dead ends: 137 [2024-11-09 05:52:13,401 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 05:52:13,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 580 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2024-11-09 05:52:13,403 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:13,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 144 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:52:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 05:52:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2024-11-09 05:52:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 20 states have call successors, (20), 8 states have call predecessors, (20), 16 states have return successors, (51), 26 states have call predecessors, (51), 20 states have call successors, (51) [2024-11-09 05:52:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2024-11-09 05:52:13,450 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 295 [2024-11-09 05:52:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:13,451 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2024-11-09 05:52:13,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2024-11-09 05:52:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2024-11-09 05:52:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2024-11-09 05:52:13,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:13,462 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 25, 25, 22, 21, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 6, 4, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:13,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:52:13,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:52:13,664 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:13,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1982009846, now seen corresponding path program 2 times [2024-11-09 05:52:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:13,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430294369] [2024-11-09 05:52:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 172 proven. 598 refuted. 0 times theorem prover too weak. 3011 trivial. 0 not checked. [2024-11-09 05:52:14,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:14,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430294369] [2024-11-09 05:52:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430294369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:14,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055307546] [2024-11-09 05:52:14,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:52:14,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:14,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:14,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:52:14,667 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 05:52:14,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:52:14,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:52:14,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 549 proven. 89 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2024-11-09 05:52:14,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 553 proven. 95 refuted. 0 times theorem prover too weak. 3133 trivial. 0 not checked. [2024-11-09 05:52:16,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055307546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:16,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601020614] [2024-11-09 05:52:16,638 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:16,638 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:16,639 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 05:52:16,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 20 [2024-11-09 05:52:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731111054] [2024-11-09 05:52:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:16,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 05:52:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 05:52:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:52:16,643 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 20 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-09 05:52:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:16,983 INFO L93 Difference]: Finished difference Result 143 states and 232 transitions. [2024-11-09 05:52:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:52:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) Word has length 364 [2024-11-09 05:52:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:16,987 INFO L225 Difference]: With dead ends: 143 [2024-11-09 05:52:16,988 INFO L226 Difference]: Without dead ends: 129 [2024-11-09 05:52:16,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 718 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:52:16,989 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:16,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:52:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-09 05:52:17,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2024-11-09 05:52:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 21 states have call successors, (21), 8 states have call predecessors, (21), 17 states have return successors, (60), 28 states have call predecessors, (60), 21 states have call successors, (60) [2024-11-09 05:52:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 164 transitions. [2024-11-09 05:52:17,015 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 164 transitions. Word has length 364 [2024-11-09 05:52:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:17,016 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 164 transitions. [2024-11-09 05:52:17,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.888888888888889) internal successors, (70), 20 states have internal predecessors, (70), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 13 states have call predecessors, (29), 15 states have call successors, (29) [2024-11-09 05:52:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 164 transitions. [2024-11-09 05:52:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2024-11-09 05:52:17,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:17,035 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 43, 43, 38, 36, 23, 23, 23, 23, 23, 23, 23, 21, 21, 21, 21, 21, 21, 21, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:17,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:52:17,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:17,240 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:17,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 787074474, now seen corresponding path program 3 times [2024-11-09 05:52:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53408179] [2024-11-09 05:52:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10937 backedges. 1019 proven. 1365 refuted. 0 times theorem prover too weak. 8553 trivial. 0 not checked. [2024-11-09 05:52:18,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53408179] [2024-11-09 05:52:18,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53408179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:18,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016832584] [2024-11-09 05:52:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:52:18,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:18,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:18,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:52:19,279 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:52:19,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:52:19,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:52:19,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10937 backedges. 3738 proven. 136 refuted. 0 times theorem prover too weak. 7063 trivial. 0 not checked. [2024-11-09 05:52:19,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10937 backedges. 409 proven. 1873 refuted. 0 times theorem prover too weak. 8655 trivial. 0 not checked. [2024-11-09 05:52:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016832584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953881992] [2024-11-09 05:52:23,913 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:23,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:23,913 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 05:52:23,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:23,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 19] total 32 [2024-11-09 05:52:23,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946416338] [2024-11-09 05:52:23,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:23,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 05:52:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 05:52:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:52:23,919 INFO L87 Difference]: Start difference. First operand 111 states and 164 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 25 states have call successors, (36), 2 states have call predecessors, (36), 15 states have return successors, (47), 16 states have call predecessors, (47), 25 states have call successors, (47) [2024-11-09 05:52:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:25,422 INFO L93 Difference]: Finished difference Result 273 states and 523 transitions. [2024-11-09 05:52:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 05:52:25,423 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 25 states have call successors, (36), 2 states have call predecessors, (36), 15 states have return successors, (47), 16 states have call predecessors, (47), 25 states have call successors, (47) Word has length 611 [2024-11-09 05:52:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:25,426 INFO L225 Difference]: With dead ends: 273 [2024-11-09 05:52:25,426 INFO L226 Difference]: Without dead ends: 164 [2024-11-09 05:52:25,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 1206 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=539, Invalid=3121, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 05:52:25,430 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:25,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 566 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:52:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-09 05:52:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2024-11-09 05:52:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 96 states have (on average 1.09375) internal successors, (105), 95 states have internal predecessors, (105), 26 states have call successors, (26), 16 states have call predecessors, (26), 18 states have return successors, (61), 29 states have call predecessors, (61), 26 states have call successors, (61) [2024-11-09 05:52:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2024-11-09 05:52:25,461 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 611 [2024-11-09 05:52:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:25,462 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2024-11-09 05:52:25,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 32 states have internal predecessors, (115), 25 states have call successors, (36), 2 states have call predecessors, (36), 15 states have return successors, (47), 16 states have call predecessors, (47), 25 states have call successors, (47) [2024-11-09 05:52:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2024-11-09 05:52:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2024-11-09 05:52:25,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:25,472 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 54, 54, 48, 46, 31, 31, 31, 31, 31, 31, 31, 27, 27, 27, 27, 27, 27, 27, 21, 15, 15, 8, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:25,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:25,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:25,672 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:25,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash 329703206, now seen corresponding path program 4 times [2024-11-09 05:52:25,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:25,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467794481] [2024-11-09 05:52:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:25,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18963 backedges. 307 proven. 2100 refuted. 0 times theorem prover too weak. 16556 trivial. 0 not checked. [2024-11-09 05:52:27,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467794481] [2024-11-09 05:52:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467794481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595485663] [2024-11-09 05:52:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:52:27,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:27,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:27,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:52:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:27,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:52:27,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18963 backedges. 307 proven. 2100 refuted. 0 times theorem prover too weak. 16556 trivial. 0 not checked. [2024-11-09 05:52:27,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18963 backedges. 307 proven. 2133 refuted. 0 times theorem prover too weak. 16523 trivial. 0 not checked. [2024-11-09 05:52:33,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595485663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:33,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311193073] [2024-11-09 05:52:33,033 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:33,033 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:33,034 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 05:52:33,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:33,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2024-11-09 05:52:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294812927] [2024-11-09 05:52:33,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:33,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 05:52:33,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 05:52:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:52:33,042 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 22 states, 20 states have (on average 3.7) internal successors, (74), 22 states have internal predecessors, (74), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-09 05:52:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:33,357 INFO L93 Difference]: Finished difference Result 170 states and 257 transitions. [2024-11-09 05:52:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:52:33,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 22 states have internal predecessors, (74), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 799 [2024-11-09 05:52:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:33,361 INFO L225 Difference]: With dead ends: 170 [2024-11-09 05:52:33,362 INFO L226 Difference]: Without dead ends: 156 [2024-11-09 05:52:33,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1622 GetRequests, 1587 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-11-09 05:52:33,363 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:33,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 195 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:52:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-09 05:52:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2024-11-09 05:52:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 27 states have call successors, (27), 16 states have call predecessors, (27), 19 states have return successors, (72), 31 states have call predecessors, (72), 27 states have call successors, (72) [2024-11-09 05:52:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 207 transitions. [2024-11-09 05:52:33,395 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 207 transitions. Word has length 799 [2024-11-09 05:52:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:33,396 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 207 transitions. [2024-11-09 05:52:33,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 22 states have internal predecessors, (74), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-09 05:52:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 207 transitions. [2024-11-09 05:52:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2024-11-09 05:52:33,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:33,401 INFO L215 NwaCegarLoop]: trace histogram [45, 45, 40, 40, 34, 34, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 14, 12, 11, 6, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:33,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:52:33,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:33,602 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:33,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash -229872306, now seen corresponding path program 5 times [2024-11-09 05:52:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:33,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457760378] [2024-11-09 05:52:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9886 backedges. 325 proven. 1181 refuted. 0 times theorem prover too weak. 8380 trivial. 0 not checked. [2024-11-09 05:52:34,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457760378] [2024-11-09 05:52:34,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457760378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:34,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262164980] [2024-11-09 05:52:34,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:52:34,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:34,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:34,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:52:34,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 05:52:34,824 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:52:34,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:52:34,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9886 backedges. 3038 proven. 33 refuted. 0 times theorem prover too weak. 6815 trivial. 0 not checked. [2024-11-09 05:52:35,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9886 backedges. 1205 proven. 162 refuted. 0 times theorem prover too weak. 8519 trivial. 0 not checked. [2024-11-09 05:52:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262164980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983195788] [2024-11-09 05:52:37,386 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:37,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:37,386 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 05:52:37,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:37,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 23 [2024-11-09 05:52:37,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101520931] [2024-11-09 05:52:37,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:37,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 05:52:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 05:52:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:52:37,391 INFO L87 Difference]: Start difference. First operand 146 states and 207 transitions. Second operand has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 23 states have internal predecessors, (94), 17 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) [2024-11-09 05:52:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:38,340 INFO L93 Difference]: Finished difference Result 351 states and 597 transitions. [2024-11-09 05:52:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:52:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 23 states have internal predecessors, (94), 17 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) Word has length 581 [2024-11-09 05:52:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:38,345 INFO L225 Difference]: With dead ends: 351 [2024-11-09 05:52:38,345 INFO L226 Difference]: Without dead ends: 215 [2024-11-09 05:52:38,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1201 GetRequests, 1150 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 05:52:38,348 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:38,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 282 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:52:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-09 05:52:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2024-11-09 05:52:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 127 states have (on average 1.094488188976378) internal successors, (139), 125 states have internal predecessors, (139), 36 states have call successors, (36), 24 states have call predecessors, (36), 20 states have return successors, (96), 34 states have call predecessors, (96), 36 states have call successors, (96) [2024-11-09 05:52:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 271 transitions. [2024-11-09 05:52:38,381 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 271 transitions. Word has length 581 [2024-11-09 05:52:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:38,381 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 271 transitions. [2024-11-09 05:52:38,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 23 states have internal predecessors, (94), 17 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (35), 14 states have call predecessors, (35), 17 states have call successors, (35) [2024-11-09 05:52:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 271 transitions. [2024-11-09 05:52:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2024-11-09 05:52:38,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:38,394 INFO L215 NwaCegarLoop]: trace histogram [76, 76, 71, 71, 61, 58, 38, 38, 38, 38, 38, 38, 38, 35, 35, 35, 35, 35, 35, 35, 26, 20, 15, 13, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:52:38,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:38,599 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:38,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1193416603, now seen corresponding path program 6 times [2024-11-09 05:52:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980531087] [2024-11-09 05:52:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30015 backedges. 430 proven. 2261 refuted. 0 times theorem prover too weak. 27324 trivial. 0 not checked. [2024-11-09 05:52:40,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980531087] [2024-11-09 05:52:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980531087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656706147] [2024-11-09 05:52:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:52:40,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:40,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:40,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:52:40,618 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:52:40,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:52:40,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 05:52:40,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30015 backedges. 7938 proven. 176 refuted. 0 times theorem prover too weak. 21901 trivial. 0 not checked. [2024-11-09 05:52:40,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30015 backedges. 480 proven. 3406 refuted. 0 times theorem prover too weak. 26129 trivial. 0 not checked. [2024-11-09 05:52:46,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656706147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:46,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983250998] [2024-11-09 05:52:46,873 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:46,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:46,874 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 05:52:46,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:46,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 19] total 28 [2024-11-09 05:52:46,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126580461] [2024-11-09 05:52:46,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:46,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 05:52:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 05:52:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2024-11-09 05:52:46,883 INFO L87 Difference]: Start difference. First operand 184 states and 271 transitions. Second operand has 28 states, 27 states have (on average 4.0) internal successors, (108), 28 states have internal predecessors, (108), 23 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (42), 14 states have call predecessors, (42), 23 states have call successors, (42) [2024-11-09 05:52:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:48,162 INFO L93 Difference]: Finished difference Result 421 states and 758 transitions. [2024-11-09 05:52:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 05:52:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.0) internal successors, (108), 28 states have internal predecessors, (108), 23 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (42), 14 states have call predecessors, (42), 23 states have call successors, (42) Word has length 1004 [2024-11-09 05:52:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:48,168 INFO L225 Difference]: With dead ends: 421 [2024-11-09 05:52:48,168 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 05:52:48,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2055 GetRequests, 1988 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=3006, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 05:52:48,174 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:48,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 431 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:52:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 05:52:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 201. [2024-11-09 05:52:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 141 states have (on average 1.070921985815603) internal successors, (151), 137 states have internal predecessors, (151), 40 states have call successors, (40), 30 states have call predecessors, (40), 19 states have return successors, (101), 33 states have call predecessors, (101), 40 states have call successors, (101) [2024-11-09 05:52:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2024-11-09 05:52:48,207 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 1004 [2024-11-09 05:52:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:48,208 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2024-11-09 05:52:48,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.0) internal successors, (108), 28 states have internal predecessors, (108), 23 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (42), 14 states have call predecessors, (42), 23 states have call successors, (42) [2024-11-09 05:52:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2024-11-09 05:52:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2024-11-09 05:52:48,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:48,214 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 45, 45, 38, 37, 24, 24, 24, 24, 24, 24, 24, 22, 22, 22, 22, 22, 22, 22, 16, 13, 10, 8, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:48,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 05:52:48,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:52:48,415 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:48,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1146108740, now seen corresponding path program 7 times [2024-11-09 05:52:48,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680537164] [2024-11-09 05:52:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11869 backedges. 511 proven. 1139 refuted. 0 times theorem prover too weak. 10219 trivial. 0 not checked. [2024-11-09 05:52:49,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:52:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680537164] [2024-11-09 05:52:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680537164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:52:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762959621] [2024-11-09 05:52:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:52:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:52:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:52:49,346 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:52:49,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:52:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:52:49,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:52:49,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:52:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11869 backedges. 269 proven. 1831 refuted. 0 times theorem prover too weak. 9769 trivial. 0 not checked. [2024-11-09 05:52:50,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:52:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11869 backedges. 269 proven. 1875 refuted. 0 times theorem prover too weak. 9725 trivial. 0 not checked. [2024-11-09 05:52:55,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762959621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:52:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086817925] [2024-11-09 05:52:55,389 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:52:55,389 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:52:55,390 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 05:52:55,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:52:55,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 27 [2024-11-09 05:52:55,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742709519] [2024-11-09 05:52:55,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:52:55,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 05:52:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:52:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 05:52:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:52:55,395 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2024-11-09 05:52:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:52:55,882 INFO L93 Difference]: Finished difference Result 266 states and 480 transitions. [2024-11-09 05:52:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 05:52:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) Word has length 636 [2024-11-09 05:52:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:52:55,889 INFO L225 Difference]: With dead ends: 266 [2024-11-09 05:52:55,889 INFO L226 Difference]: Without dead ends: 242 [2024-11-09 05:52:55,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1253 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:52:55,893 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:52:55,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 200 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:52:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-09 05:52:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 225. [2024-11-09 05:52:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 156 states have (on average 1.064102564102564) internal successors, (166), 152 states have internal predecessors, (166), 43 states have call successors, (43), 30 states have call predecessors, (43), 25 states have return successors, (145), 42 states have call predecessors, (145), 43 states have call successors, (145) [2024-11-09 05:52:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 354 transitions. [2024-11-09 05:52:55,937 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 354 transitions. Word has length 636 [2024-11-09 05:52:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:52:55,938 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 354 transitions. [2024-11-09 05:52:55,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2024-11-09 05:52:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 354 transitions. [2024-11-09 05:52:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2027 [2024-11-09 05:52:56,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:52:56,035 INFO L215 NwaCegarLoop]: trace histogram [159, 159, 138, 138, 123, 118, 79, 79, 79, 79, 79, 79, 79, 69, 69, 69, 69, 69, 69, 69, 54, 39, 36, 20, 1, 1, 1, 1, 1, 1] [2024-11-09 05:52:56,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:52:56,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:52:56,237 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:52:56,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:52:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 576979208, now seen corresponding path program 8 times [2024-11-09 05:52:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:52:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773996002] [2024-11-09 05:52:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:52:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:52:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 124170 backedges. 4924 proven. 6893 refuted. 0 times theorem prover too weak. 112353 trivial. 0 not checked. [2024-11-09 05:53:02,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:53:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773996002] [2024-11-09 05:53:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773996002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759907699] [2024-11-09 05:53:02,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:53:02,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:02,842 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:02,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:53:03,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 05:53:03,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:03,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:53:03,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 124170 backedges. 6380 proven. 161 refuted. 0 times theorem prover too weak. 117629 trivial. 0 not checked. [2024-11-09 05:53:03,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 124170 backedges. 6380 proven. 167 refuted. 0 times theorem prover too weak. 117623 trivial. 0 not checked. [2024-11-09 05:53:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759907699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302029836] [2024-11-09 05:53:12,369 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:53:12,370 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:53:12,370 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 05:53:12,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:53:12,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 17] total 37 [2024-11-09 05:53:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143962128] [2024-11-09 05:53:12,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:12,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 05:53:12,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:53:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 05:53:12,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 05:53:12,377 INFO L87 Difference]: Start difference. First operand 225 states and 354 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 26 states have call successors, (37), 1 states have call predecessors, (37), 21 states have return successors, (54), 27 states have call predecessors, (54), 26 states have call successors, (54) [2024-11-09 05:53:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:14,592 INFO L93 Difference]: Finished difference Result 493 states and 901 transitions. [2024-11-09 05:53:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 05:53:14,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 26 states have call successors, (37), 1 states have call predecessors, (37), 21 states have return successors, (54), 27 states have call predecessors, (54), 26 states have call successors, (54) Word has length 2026 [2024-11-09 05:53:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:14,600 INFO L225 Difference]: With dead ends: 493 [2024-11-09 05:53:14,600 INFO L226 Difference]: Without dead ends: 282 [2024-11-09 05:53:14,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4127 GetRequests, 4040 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=859, Invalid=5621, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 05:53:14,606 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 158 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:14,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 883 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 05:53:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-09 05:53:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 254. [2024-11-09 05:53:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 173 states have internal predecessors, (190), 49 states have call successors, (49), 38 states have call predecessors, (49), 25 states have return successors, (149), 42 states have call predecessors, (149), 49 states have call successors, (149) [2024-11-09 05:53:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 388 transitions. [2024-11-09 05:53:14,648 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 388 transitions. Word has length 2026 [2024-11-09 05:53:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:14,649 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 388 transitions. [2024-11-09 05:53:14,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 states have internal predecessors, (120), 26 states have call successors, (37), 1 states have call predecessors, (37), 21 states have return successors, (54), 27 states have call predecessors, (54), 26 states have call successors, (54) [2024-11-09 05:53:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 388 transitions. [2024-11-09 05:53:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2285 [2024-11-09 05:53:14,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:14,694 INFO L215 NwaCegarLoop]: trace histogram [170, 170, 165, 165, 138, 133, 85, 85, 85, 85, 85, 85, 85, 82, 82, 82, 82, 82, 82, 82, 56, 48, 32, 32, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:14,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 05:53:14,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:53:14,895 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:14,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1992870613, now seen corresponding path program 9 times [2024-11-09 05:53:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:53:14,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439628004] [2024-11-09 05:53:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:53:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 157375 backedges. 906 proven. 8210 refuted. 0 times theorem prover too weak. 148259 trivial. 0 not checked. [2024-11-09 05:53:19,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:53:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439628004] [2024-11-09 05:53:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439628004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385770726] [2024-11-09 05:53:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:53:19,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:19,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:19,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:53:20,669 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:53:20,669 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:53:20,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 4064 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:53:20,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 157375 backedges. 60264 proven. 1897 refuted. 0 times theorem prover too weak. 95214 trivial. 0 not checked. [2024-11-09 05:53:21,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 157375 backedges. 1753 proven. 12450 refuted. 0 times theorem prover too weak. 143172 trivial. 0 not checked. [2024-11-09 05:53:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385770726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:36,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53651714] [2024-11-09 05:53:36,544 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:53:36,544 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:53:36,545 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 05:53:36,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:53:36,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 31] total 39 [2024-11-09 05:53:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032507287] [2024-11-09 05:53:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:36,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 05:53:36,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:53:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 05:53:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 05:53:36,553 INFO L87 Difference]: Start difference. First operand 254 states and 388 transitions. Second operand has 39 states, 38 states have (on average 3.710526315789474) internal successors, (141), 39 states have internal predecessors, (141), 35 states have call successors, (44), 2 states have call predecessors, (44), 19 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) [2024-11-09 05:53:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:38,704 INFO L93 Difference]: Finished difference Result 626 states and 1164 transitions. [2024-11-09 05:53:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-09 05:53:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.710526315789474) internal successors, (141), 39 states have internal predecessors, (141), 35 states have call successors, (44), 2 states have call predecessors, (44), 19 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) Word has length 2284 [2024-11-09 05:53:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:38,715 INFO L225 Difference]: With dead ends: 626 [2024-11-09 05:53:38,715 INFO L226 Difference]: Without dead ends: 378 [2024-11-09 05:53:38,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4638 GetRequests, 4537 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1081, Invalid=6575, Unknown=0, NotChecked=0, Total=7656 [2024-11-09 05:53:38,722 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 268 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:38,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 656 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:53:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-09 05:53:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 315. [2024-11-09 05:53:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 224 states have (on average 1.0669642857142858) internal successors, (239), 217 states have internal predecessors, (239), 64 states have call successors, (64), 52 states have call predecessors, (64), 26 states have return successors, (192), 45 states have call predecessors, (192), 64 states have call successors, (192) [2024-11-09 05:53:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 495 transitions. [2024-11-09 05:53:38,782 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 495 transitions. Word has length 2284 [2024-11-09 05:53:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:38,783 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 495 transitions. [2024-11-09 05:53:38,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.710526315789474) internal successors, (141), 39 states have internal predecessors, (141), 35 states have call successors, (44), 2 states have call predecessors, (44), 19 states have return successors, (58), 18 states have call predecessors, (58), 35 states have call successors, (58) [2024-11-09 05:53:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 495 transitions. [2024-11-09 05:53:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2203 [2024-11-09 05:53:38,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:38,835 INFO L215 NwaCegarLoop]: trace histogram [166, 166, 157, 157, 131, 130, 83, 83, 83, 83, 83, 83, 83, 78, 78, 78, 78, 78, 78, 78, 52, 48, 36, 26, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:38,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 05:53:39,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:53:39,039 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:39,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash 932209187, now seen corresponding path program 10 times [2024-11-09 05:53:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:53:39,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288862697] [2024-11-09 05:53:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:53:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 146288 backedges. 1656 proven. 6218 refuted. 0 times theorem prover too weak. 138414 trivial. 0 not checked. [2024-11-09 05:53:43,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:53:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288862697] [2024-11-09 05:53:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288862697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:53:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793244243] [2024-11-09 05:53:43,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:53:43,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:53:43,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:53:43,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:53:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:53:44,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 4911 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:53:44,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:53:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 146288 backedges. 1033 proven. 8605 refuted. 0 times theorem prover too weak. 136650 trivial. 0 not checked. [2024-11-09 05:53:45,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:53:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 146288 backedges. 1033 proven. 8675 refuted. 0 times theorem prover too weak. 136580 trivial. 0 not checked. [2024-11-09 05:53:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793244243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:53:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838237] [2024-11-09 05:53:58,164 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:53:58,165 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:53:58,165 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 05:53:58,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:53:58,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 32 [2024-11-09 05:53:58,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909819295] [2024-11-09 05:53:58,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:53:58,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 05:53:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:53:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 05:53:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:53:58,171 INFO L87 Difference]: Start difference. First operand 315 states and 495 transitions. Second operand has 32 states, 30 states have (on average 3.466666666666667) internal successors, (104), 32 states have internal predecessors, (104), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2024-11-09 05:53:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:53:58,630 INFO L93 Difference]: Finished difference Result 375 states and 683 transitions. [2024-11-09 05:53:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 05:53:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.466666666666667) internal successors, (104), 32 states have internal predecessors, (104), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) Word has length 2202 [2024-11-09 05:53:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:53:58,639 INFO L225 Difference]: With dead ends: 375 [2024-11-09 05:53:58,640 INFO L226 Difference]: Without dead ends: 351 [2024-11-09 05:53:58,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4437 GetRequests, 4382 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 05:53:58,642 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:53:58,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 206 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:53:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-09 05:53:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 325. [2024-11-09 05:53:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 230 states have (on average 1.065217391304348) internal successors, (245), 223 states have internal predecessors, (245), 66 states have call successors, (66), 52 states have call predecessors, (66), 28 states have return successors, (202), 49 states have call predecessors, (202), 66 states have call successors, (202) [2024-11-09 05:53:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 513 transitions. [2024-11-09 05:53:58,691 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 513 transitions. Word has length 2202 [2024-11-09 05:53:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:53:58,691 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 513 transitions. [2024-11-09 05:53:58,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.466666666666667) internal successors, (104), 32 states have internal predecessors, (104), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2024-11-09 05:53:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 513 transitions. [2024-11-09 05:53:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3850 [2024-11-09 05:53:58,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:53:58,774 INFO L215 NwaCegarLoop]: trace histogram [288, 288, 277, 277, 230, 226, 144, 144, 144, 144, 144, 144, 144, 138, 138, 138, 138, 138, 138, 138, 92, 82, 58, 51, 1, 1, 1, 1, 1, 1] [2024-11-09 05:53:58,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 05:53:58,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:53:58,975 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:53:58,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:53:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1654917614, now seen corresponding path program 11 times [2024-11-09 05:53:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:53:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709439541] [2024-11-09 05:53:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:53:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:54:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 448972 backedges. 2939 proven. 11010 refuted. 0 times theorem prover too weak. 435023 trivial. 0 not checked. [2024-11-09 05:54:09,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:54:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709439541] [2024-11-09 05:54:09,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709439541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:54:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114349017] [2024-11-09 05:54:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:54:09,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:54:09,174 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:54:09,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:54:10,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-09 05:54:10,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:54:10,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:54:10,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:54:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 448972 backedges. 1867 proven. 16858 refuted. 0 times theorem prover too weak. 430247 trivial. 0 not checked. [2024-11-09 05:54:10,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:54:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 448972 backedges. 1867 proven. 16943 refuted. 0 times theorem prover too weak. 430162 trivial. 0 not checked. [2024-11-09 05:54:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114349017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:54:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426117514] [2024-11-09 05:54:33,463 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:54:33,464 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:54:33,464 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 05:54:33,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:54:33,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 27] total 38 [2024-11-09 05:54:33,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97894578] [2024-11-09 05:54:33,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:54:33,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 05:54:33,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:54:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 05:54:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:54:33,471 INFO L87 Difference]: Start difference. First operand 325 states and 513 transitions. Second operand has 38 states, 36 states have (on average 3.388888888888889) internal successors, (122), 38 states have internal predecessors, (122), 33 states have call successors, (38), 1 states have call predecessors, (38), 21 states have return successors, (56), 22 states have call predecessors, (56), 33 states have call successors, (56) [2024-11-09 05:54:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:54:34,178 INFO L93 Difference]: Finished difference Result 431 states and 944 transitions. [2024-11-09 05:54:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 05:54:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.388888888888889) internal successors, (122), 38 states have internal predecessors, (122), 33 states have call successors, (38), 1 states have call predecessors, (38), 21 states have return successors, (56), 22 states have call predecessors, (56), 33 states have call successors, (56) Word has length 3849 [2024-11-09 05:54:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:54:34,195 INFO L225 Difference]: With dead ends: 431 [2024-11-09 05:54:34,195 INFO L226 Difference]: Without dead ends: 407 [2024-11-09 05:54:34,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7735 GetRequests, 7669 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=568, Invalid=2512, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 05:54:34,199 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:54:34,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 289 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:54:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-09 05:54:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 355. [2024-11-09 05:54:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 248 states have (on average 1.060483870967742) internal successors, (263), 241 states have internal predecessors, (263), 72 states have call successors, (72), 52 states have call predecessors, (72), 34 states have return successors, (287), 61 states have call predecessors, (287), 72 states have call successors, (287) [2024-11-09 05:54:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 622 transitions. [2024-11-09 05:54:34,268 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 622 transitions. Word has length 3849 [2024-11-09 05:54:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:54:34,268 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 622 transitions. [2024-11-09 05:54:34,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.388888888888889) internal successors, (122), 38 states have internal predecessors, (122), 33 states have call successors, (38), 1 states have call predecessors, (38), 21 states have return successors, (56), 22 states have call predecessors, (56), 33 states have call successors, (56) [2024-11-09 05:54:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 622 transitions. [2024-11-09 05:54:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7745 [2024-11-09 05:54:34,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:54:34,676 INFO L215 NwaCegarLoop]: trace histogram [582, 582, 555, 555, 460, 459, 291, 291, 291, 291, 291, 291, 291, 277, 277, 277, 277, 277, 277, 277, 182, 169, 123, 95, 1, 1, 1, 1, 1, 1] [2024-11-09 05:54:34,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 05:54:34,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:54:34,877 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:54:34,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:54:34,878 INFO L85 PathProgramCache]: Analyzing trace with hash 724175296, now seen corresponding path program 12 times [2024-11-09 05:54:34,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:54:34,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489902994] [2024-11-09 05:54:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:54:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:54:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:55:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1823589 backedges. 4348 proven. 30453 refuted. 0 times theorem prover too weak. 1788788 trivial. 0 not checked. [2024-11-09 05:55:24,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:55:24,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489902994] [2024-11-09 05:55:24,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489902994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:55:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569479085] [2024-11-09 05:55:24,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:55:24,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:55:24,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:55:24,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:55:24,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 05:55:27,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:55:27,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:55:27,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 13781 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 05:55:27,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:55:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1823589 backedges. 165445 proven. 919 refuted. 0 times theorem prover too weak. 1657225 trivial. 0 not checked. [2024-11-09 05:55:27,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:56:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1823589 backedges. 4278 proven. 46326 refuted. 0 times theorem prover too weak. 1772985 trivial. 0 not checked. [2024-11-09 05:56:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569479085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:56:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208821829] [2024-11-09 05:56:06,421 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:56:06,421 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:56:06,422 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 05:56:06,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:56:06,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 27] total 38 [2024-11-09 05:56:06,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441015591] [2024-11-09 05:56:06,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:56:06,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 05:56:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:56:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 05:56:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 05:56:06,431 INFO L87 Difference]: Start difference. First operand 355 states and 622 transitions. Second operand has 38 states, 37 states have (on average 3.72972972972973) internal successors, (138), 38 states have internal predecessors, (138), 33 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (58), 20 states have call predecessors, (58), 33 states have call successors, (58) [2024-11-09 05:56:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:56:08,700 INFO L93 Difference]: Finished difference Result 965 states and 2332 transitions. [2024-11-09 05:56:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 05:56:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.72972972972973) internal successors, (138), 38 states have internal predecessors, (138), 33 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (58), 20 states have call predecessors, (58), 33 states have call successors, (58) Word has length 7744 [2024-11-09 05:56:08,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:56:08,720 INFO L225 Difference]: With dead ends: 965 [2024-11-09 05:56:08,721 INFO L226 Difference]: Without dead ends: 578 [2024-11-09 05:56:08,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15565 GetRequests, 15462 SyntacticMatches, 13 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1207, Invalid=7165, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 05:56:08,733 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 252 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:56:08,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 629 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:56:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-11-09 05:56:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 447. [2024-11-09 05:56:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 311 states have (on average 1.0578778135048232) internal successors, (329), 303 states have internal predecessors, (329), 92 states have call successors, (92), 64 states have call predecessors, (92), 43 states have return successors, (461), 79 states have call predecessors, (461), 92 states have call successors, (461) [2024-11-09 05:56:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 882 transitions. [2024-11-09 05:56:08,845 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 882 transitions. Word has length 7744 [2024-11-09 05:56:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:56:08,847 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 882 transitions. [2024-11-09 05:56:08,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.72972972972973) internal successors, (138), 38 states have internal predecessors, (138), 33 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (58), 20 states have call predecessors, (58), 33 states have call successors, (58) [2024-11-09 05:56:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 882 transitions. [2024-11-09 05:56:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6697 [2024-11-09 05:56:09,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:56:09,165 INFO L215 NwaCegarLoop]: trace histogram [498, 498, 485, 485, 398, 397, 249, 249, 249, 249, 249, 249, 249, 242, 242, 242, 242, 242, 242, 242, 155, 149, 101, 87, 1, 1, 1, 1, 1, 1] [2024-11-09 05:56:09,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 05:56:09,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:09,366 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:56:09,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:56:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1681378339, now seen corresponding path program 13 times [2024-11-09 05:56:09,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:56:09,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600143506] [2024-11-09 05:56:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:56:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:56:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:56:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1362249 backedges. 15049 proven. 32389 refuted. 0 times theorem prover too weak. 1314811 trivial. 0 not checked. [2024-11-09 05:56:57,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:56:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600143506] [2024-11-09 05:56:57,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600143506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:56:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141537030] [2024-11-09 05:56:57,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:56:57,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:56:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:56:57,143 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:56:57,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 05:56:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:57:00,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 14889 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 05:57:00,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:57:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1362249 backedges. 3759 proven. 31876 refuted. 0 times theorem prover too weak. 1326614 trivial. 0 not checked. [2024-11-09 05:57:00,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:57:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1362249 backedges. 3759 proven. 31978 refuted. 0 times theorem prover too weak. 1326512 trivial. 0 not checked. [2024-11-09 05:57:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141537030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:57:36,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682187913] [2024-11-09 05:57:36,694 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 05:57:36,694 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:57:36,694 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 05:57:36,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:57:36,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 29] total 50 [2024-11-09 05:57:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596444524] [2024-11-09 05:57:36,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:57:36,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 05:57:36,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:57:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 05:57:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 05:57:36,709 INFO L87 Difference]: Start difference. First operand 447 states and 882 transitions. Second operand has 50 states, 48 states have (on average 3.25) internal successors, (156), 50 states have internal predecessors, (156), 43 states have call successors, (50), 1 states have call predecessors, (50), 27 states have return successors, (72), 29 states have call predecessors, (72), 43 states have call successors, (72) [2024-11-09 05:57:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:57:40,385 INFO L93 Difference]: Finished difference Result 1041 states and 2610 transitions. [2024-11-09 05:57:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-09 05:57:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.25) internal successors, (156), 50 states have internal predecessors, (156), 43 states have call successors, (50), 1 states have call predecessors, (50), 27 states have return successors, (72), 29 states have call predecessors, (72), 43 states have call successors, (72) Word has length 6696 [2024-11-09 05:57:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:57:40,403 INFO L225 Difference]: With dead ends: 1041 [2024-11-09 05:57:40,403 INFO L226 Difference]: Without dead ends: 549 [2024-11-09 05:57:40,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13497 GetRequests, 13366 SyntacticMatches, 13 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4380 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1730, Invalid=12550, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 05:57:40,417 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 267 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:57:40,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1227 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 05:57:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2024-11-09 05:57:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 396. [2024-11-09 05:57:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 281 states have (on average 1.0462633451957295) internal successors, (294), 275 states have internal predecessors, (294), 84 states have call successors, (84), 67 states have call predecessors, (84), 30 states have return successors, (213), 53 states have call predecessors, (213), 84 states have call successors, (213) [2024-11-09 05:57:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 591 transitions. [2024-11-09 05:57:40,496 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 591 transitions. Word has length 6696 [2024-11-09 05:57:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:57:40,498 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 591 transitions. [2024-11-09 05:57:40,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.25) internal successors, (156), 50 states have internal predecessors, (156), 43 states have call successors, (50), 1 states have call predecessors, (50), 27 states have return successors, (72), 29 states have call predecessors, (72), 43 states have call successors, (72) [2024-11-09 05:57:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 591 transitions. [2024-11-09 05:57:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10619 [2024-11-09 05:57:41,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:57:41,129 INFO L215 NwaCegarLoop]: trace histogram [780, 780, 779, 779, 632, 629, 390, 390, 390, 390, 390, 390, 390, 389, 389, 389, 389, 389, 389, 389, 242, 240, 151, 147, 1, 1, 1, 1, 1, 1] [2024-11-09 05:57:41,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 05:57:41,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:57:41,330 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:57:41,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:57:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1309943033, now seen corresponding path program 14 times [2024-11-09 05:57:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:57:41,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803418090] [2024-11-09 05:57:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:57:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:57:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:59:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3429550 backedges. 8510 proven. 43861 refuted. 0 times theorem prover too weak. 3377179 trivial. 0 not checked. [2024-11-09 05:59:23,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:59:23,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803418090] [2024-11-09 05:59:23,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803418090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:59:23,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297690836] [2024-11-09 05:59:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:59:23,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:59:23,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:59:23,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 05:59:25,718 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2024-11-09 05:59:25,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:59:25,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:59:25,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:59:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3429550 backedges. 4958 proven. 56324 refuted. 0 times theorem prover too weak. 3368268 trivial. 0 not checked. [2024-11-09 05:59:26,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3429550 backedges. 4958 proven. 56444 refuted. 0 times theorem prover too weak. 3368148 trivial. 0 not checked. [2024-11-09 06:00:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297690836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:21,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541877041] [2024-11-09 06:00:21,729 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:00:21,729 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:21,729 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 06:00:21,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 31] total 37 [2024-11-09 06:00:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991960718] [2024-11-09 06:00:21,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:21,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 06:00:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 06:00:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:00:21,745 INFO L87 Difference]: Start difference. First operand 396 states and 591 transitions. Second operand has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 19 states have return successors, (53), 20 states have call predecessors, (53), 33 states have call successors, (53) [2024-11-09 06:00:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:22,470 INFO L93 Difference]: Finished difference Result 450 states and 754 transitions. [2024-11-09 06:00:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:00:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 19 states have return successors, (53), 20 states have call predecessors, (53), 33 states have call successors, (53) Word has length 10618 [2024-11-09 06:00:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:22,484 INFO L225 Difference]: With dead ends: 450 [2024-11-09 06:00:22,484 INFO L226 Difference]: Without dead ends: 426 [2024-11-09 06:00:22,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21278 GetRequests, 21211 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2024-11-09 06:00:22,486 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:22,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 269 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:00:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-09 06:00:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 411. [2024-11-09 06:00:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 290 states have (on average 1.0448275862068965) internal successors, (303), 284 states have internal predecessors, (303), 87 states have call successors, (87), 67 states have call predecessors, (87), 33 states have return successors, (240), 59 states have call predecessors, (240), 87 states have call successors, (240) [2024-11-09 06:00:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 630 transitions. [2024-11-09 06:00:22,564 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 630 transitions. Word has length 10618 [2024-11-09 06:00:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:22,567 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 630 transitions. [2024-11-09 06:00:22,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 33 states have call successors, (37), 1 states have call predecessors, (37), 19 states have return successors, (53), 20 states have call predecessors, (53), 33 states have call successors, (53) [2024-11-09 06:00:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 630 transitions. [2024-11-09 06:00:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22712 [2024-11-09 06:00:25,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:25,227 INFO L215 NwaCegarLoop]: trace histogram [1678, 1678, 1657, 1657, 1351, 1347, 839, 839, 839, 839, 839, 839, 839, 828, 828, 828, 828, 828, 828, 828, 519, 512, 331, 306, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:25,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:25,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918b3f28-d289-49b0-bfb2-fd36d3462c79/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:25,428 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:25,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 17049553, now seen corresponding path program 15 times [2024-11-09 06:00:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470169818] [2024-11-09 06:00:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:01:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat