./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire --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 fd6b20844e2c749d2220243ee5decb4640d1db1a76545071f1578ab9a21c944c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:03,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:03,427 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:15:03,435 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:03,436 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:03,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:03,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:03,470 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:03,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:03,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:03,473 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:03,474 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:03,474 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:03,475 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:15:03,476 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:03,476 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:03,477 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:15:03,478 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:15:03,478 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:03,479 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:15:03,480 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:15:03,486 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:15:03,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:03,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:03,488 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:15:03,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:15:03,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:15:03,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:03,490 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:03,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:03,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:03,491 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:15:03,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:03,492 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:03,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:03,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:03,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:03,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:03,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:03,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:03,496 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:03,499 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:15:03,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:15:03,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:03,500 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:03,501 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:03,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:03,501 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd6b20844e2c749d2220243ee5decb4640d1db1a76545071f1578ab9a21c944c [2023-11-23 21:15:03,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:03,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:03,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:03,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:03,967 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:03,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c [2023-11-23 21:15:07,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:08,765 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:08,767 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c [2023-11-23 21:15:08,847 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/data/348dd738b/da65363db4c0487094379d83694316ab/FLAGcd2904b59 [2023-11-23 21:15:08,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/data/348dd738b/da65363db4c0487094379d83694316ab [2023-11-23 21:15:08,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:08,879 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:08,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:08,884 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:08,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:08,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:08" (1/1) ... [2023-11-23 21:15:08,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3b4f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:08, skipping insertion in model container [2023-11-23 21:15:08,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:08" (1/1) ... [2023-11-23 21:15:09,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:12,296 WARN L240 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[381679,381692] [2023-11-23 21:15:12,330 WARN L240 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[383339,383352] [2023-11-23 21:15:12,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:12,766 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:14,462 WARN L240 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[381679,381692] [2023-11-23 21:15:14,467 WARN L240 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_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[383339,383352] [2023-11-23 21:15:14,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:14,643 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:14,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14 WrapperNode [2023-11-23 21:15:14,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:14,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:14,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:14,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:14,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:14,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,183 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13048 [2023-11-23 21:15:15,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:15,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:15,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:15,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:15,194 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:15,994 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:15,996 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:15,996 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:15,996 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:15,997 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:16,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:16,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:16,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:16,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:16,071 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:15:16,072 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:15:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:15:16,072 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:15:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:15:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:15:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:15:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:15:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:15:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:15:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:15:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:15:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:16,331 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:16,334 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:26,352 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:29,266 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:29,267 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-23 21:15:29,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:29 BoogieIcfgContainer [2023-11-23 21:15:29,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:29,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:29,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:29,279 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:29,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:08" (1/3) ... [2023-11-23 21:15:29,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582ff03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:29, skipping insertion in model container [2023-11-23 21:15:29,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14" (2/3) ... [2023-11-23 21:15:29,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582ff03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:29, skipping insertion in model container [2023-11-23 21:15:29,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:29" (3/3) ... [2023-11-23 21:15:29,284 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.09.cil-1.c [2023-11-23 21:15:29,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:29,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:15:29,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:29,416 INFO L357 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, mHoare=true, 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;@767c6388, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:29,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:15:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-23 21:15:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:15:29,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:29,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:29,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:29,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1881703738, now seen corresponding path program 1 times [2023-11-23 21:15:29,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:29,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495506196] [2023-11-23 21:15:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:29,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:30,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495506196] [2023-11-23 21:15:30,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495506196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:30,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:30,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:15:30,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280588214] [2023-11-23 21:15:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:30,326 INFO L87 Difference]: Start difference. First operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:15:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:31,438 INFO L93 Difference]: Finished difference Result 3764 states and 7289 transitions. [2023-11-23 21:15:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2023-11-23 21:15:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:31,468 INFO L225 Difference]: With dead ends: 3764 [2023-11-23 21:15:31,468 INFO L226 Difference]: Without dead ends: 1955 [2023-11-23 21:15:31,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:31,480 INFO L413 NwaCegarLoop]: 3441 mSDtfsCounter, 3700 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 6796 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:31,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 6796 Invalid, 692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:15:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-11-23 21:15:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1954. [2023-11-23 21:15:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1898 states have (on average 1.9199157007376186) internal successors, (3644), 1901 states have internal predecessors, (3644), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-23 21:15:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3728 transitions. [2023-11-23 21:15:31,631 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3728 transitions. Word has length 58 [2023-11-23 21:15:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:31,632 INFO L495 AbstractCegarLoop]: Abstraction has 1954 states and 3728 transitions. [2023-11-23 21:15:31,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:15:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3728 transitions. [2023-11-23 21:15:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:31,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:31,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:31,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:15:31,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:31,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 430590172, now seen corresponding path program 1 times [2023-11-23 21:15:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:31,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329196540] [2023-11-23 21:15:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:31,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:31,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329196540] [2023-11-23 21:15:31,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329196540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598368295] [2023-11-23 21:15:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:31,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:31,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:31,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:31,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:15:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:32,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:32,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:15:32,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:32,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598368295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:32,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:32,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281111819] [2023-11-23 21:15:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:32,271 INFO L87 Difference]: Start difference. First operand 1954 states and 3728 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:33,024 INFO L93 Difference]: Finished difference Result 2563 states and 4645 transitions. [2023-11-23 21:15:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-23 21:15:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:33,044 INFO L225 Difference]: With dead ends: 2563 [2023-11-23 21:15:33,045 INFO L226 Difference]: Without dead ends: 2255 [2023-11-23 21:15:33,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:33,049 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3463 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:33,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3491 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:15:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2023-11-23 21:15:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2251. [2023-11-23 21:15:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2147 states have (on average 1.8653935724266417) internal successors, (4005), 2151 states have internal predecessors, (4005), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-23 21:15:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 4161 transitions. [2023-11-23 21:15:33,155 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 4161 transitions. Word has length 116 [2023-11-23 21:15:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:33,156 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 4161 transitions. [2023-11-23 21:15:33,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 4161 transitions. [2023-11-23 21:15:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:33,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:33,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:33,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:33,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -903706726, now seen corresponding path program 1 times [2023-11-23 21:15:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:33,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124302043] [2023-11-23 21:15:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:33,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124302043] [2023-11-23 21:15:33,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124302043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439818161] [2023-11-23 21:15:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:33,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:33,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:33,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:15:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:33,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:33,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:15:34,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439818161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:34,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:34,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056796653] [2023-11-23 21:15:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:34,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:34,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:34,026 INFO L87 Difference]: Start difference. First operand 2251 states and 4161 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:34,631 INFO L93 Difference]: Finished difference Result 3448 states and 5956 transitions. [2023-11-23 21:15:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:34,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-23 21:15:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:34,653 INFO L225 Difference]: With dead ends: 3448 [2023-11-23 21:15:34,653 INFO L226 Difference]: Without dead ends: 2843 [2023-11-23 21:15:34,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:34,658 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3481 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:34,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 3489 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2023-11-23 21:15:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2837. [2023-11-23 21:15:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2639 states have (on average 1.786661614247821) internal successors, (4715), 2645 states have internal predecessors, (4715), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-23 21:15:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 5011 transitions. [2023-11-23 21:15:34,809 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 5011 transitions. Word has length 116 [2023-11-23 21:15:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:34,811 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 5011 transitions. [2023-11-23 21:15:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 5011 transitions. [2023-11-23 21:15:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:34,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:34,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:34,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:35,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:35,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash 884724440, now seen corresponding path program 1 times [2023-11-23 21:15:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:35,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682199341] [2023-11-23 21:15:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:35,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682199341] [2023-11-23 21:15:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682199341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:35,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829105829] [2023-11-23 21:15:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:35,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:35,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:35,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:35,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:15:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:35,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:35,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:15:35,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:35,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829105829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:35,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:35,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:35,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785257722] [2023-11-23 21:15:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:35,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:35,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:35,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:35,554 INFO L87 Difference]: Start difference. First operand 2837 states and 5011 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:36,214 INFO L93 Difference]: Finished difference Result 5194 states and 8528 transitions. [2023-11-23 21:15:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-23 21:15:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:36,243 INFO L225 Difference]: With dead ends: 5194 [2023-11-23 21:15:36,244 INFO L226 Difference]: Without dead ends: 4003 [2023-11-23 21:15:36,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:36,252 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3475 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2023-11-23 21:15:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3993. [2023-11-23 21:15:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3611 states have (on average 1.6923289947382996) internal successors, (6111), 3621 states have internal predecessors, (6111), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-23 21:15:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 6679 transitions. [2023-11-23 21:15:36,484 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 6679 transitions. Word has length 116 [2023-11-23 21:15:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:36,485 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 6679 transitions. [2023-11-23 21:15:36,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 6679 transitions. [2023-11-23 21:15:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:36,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:36,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:36,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:36,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1308236650, now seen corresponding path program 1 times [2023-11-23 21:15:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:36,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495827369] [2023-11-23 21:15:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:36,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:36,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495827369] [2023-11-23 21:15:36,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495827369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:36,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842357512] [2023-11-23 21:15:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:36,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:36,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:36,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:36,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:15:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:37,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:37,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:15:37,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:37,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842357512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:37,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:37,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677704608] [2023-11-23 21:15:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:37,206 INFO L87 Difference]: Start difference. First operand 3993 states and 6679 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:38,037 INFO L93 Difference]: Finished difference Result 8638 states and 13572 transitions. [2023-11-23 21:15:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-23 21:15:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:38,080 INFO L225 Difference]: With dead ends: 8638 [2023-11-23 21:15:38,080 INFO L226 Difference]: Without dead ends: 6291 [2023-11-23 21:15:38,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:38,091 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3484 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3484 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:15:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2023-11-23 21:15:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 6273. [2023-11-23 21:15:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5531 states have (on average 1.6009763153136864) internal successors, (8855), 5549 states have internal predecessors, (8855), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-11-23 21:15:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9951 transitions. [2023-11-23 21:15:38,389 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9951 transitions. Word has length 116 [2023-11-23 21:15:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:38,389 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9951 transitions. [2023-11-23 21:15:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9951 transitions. [2023-11-23 21:15:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:38,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:38,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:38,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:15:38,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:38,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:38,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1224677224, now seen corresponding path program 1 times [2023-11-23 21:15:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:38,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491903826] [2023-11-23 21:15:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:15:38,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491903826] [2023-11-23 21:15:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491903826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85464154] [2023-11-23 21:15:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:38,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:38,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:38,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:15:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:39,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:15:39,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:15:39,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85464154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:39,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:15:39,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309854207] [2023-11-23 21:15:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:39,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:39,076 INFO L87 Difference]: Start difference. First operand 6273 states and 9951 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:39,798 INFO L93 Difference]: Finished difference Result 15430 states and 23460 transitions. [2023-11-23 21:15:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-23 21:15:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:39,887 INFO L225 Difference]: With dead ends: 15430 [2023-11-23 21:15:39,888 INFO L226 Difference]: Without dead ends: 10803 [2023-11-23 21:15:39,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:15:39,909 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3469 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:39,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2023-11-23 21:15:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 10769. [2023-11-23 21:15:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10769 states, 9323 states have (on average 1.5281561729057171) internal successors, (14247), 9357 states have internal predecessors, (14247), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2023-11-23 21:15:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10769 states to 10769 states and 16367 transitions. [2023-11-23 21:15:40,414 INFO L78 Accepts]: Start accepts. Automaton has 10769 states and 16367 transitions. Word has length 116 [2023-11-23 21:15:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:40,416 INFO L495 AbstractCegarLoop]: Abstraction has 10769 states and 16367 transitions. [2023-11-23 21:15:40,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:15:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 10769 states and 16367 transitions. [2023-11-23 21:15:40,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:15:40,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:40,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:40,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf72a39-2ca0-4af1-8b7f-b6a79f752b5c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:15:40,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:40,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash 850567382, now seen corresponding path program 1 times [2023-11-23 21:15:40,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:40,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407844996] [2023-11-23 21:15:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 21:15:40,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407844996] [2023-11-23 21:15:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407844996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:40,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:40,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:40,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876960730] [2023-11-23 21:15:40,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:40,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:40,862 INFO L87 Difference]: Start difference. First operand 10769 states and 16367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:15:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:41,923 INFO L93 Difference]: Finished difference Result 18003 states and 27056 transitions. [2023-11-23 21:15:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-11-23 21:15:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:41,984 INFO L225 Difference]: With dead ends: 18003 [2023-11-23 21:15:41,984 INFO L226 Difference]: Without dead ends: 13361 [2023-11-23 21:15:42,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:42,005 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 109 mSDsluCounter, 3264 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6632 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:42,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6632 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13361 states. [2023-11-23 21:15:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13361 to 12673. [2023-11-23 21:15:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12673 states, 11163 states have (on average 1.5399982083669264) internal successors, (17191), 11197 states have internal predecessors, (17191), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-11-23 21:15:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 19375 transitions. [2023-11-23 21:15:42,556 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 19375 transitions. Word has length 116 [2023-11-23 21:15:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:42,558 INFO L495 AbstractCegarLoop]: Abstraction has 12673 states and 19375 transitions. [2023-11-23 21:15:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:15:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 19375 transitions. [2023-11-23 21:15:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 21:15:42,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:42,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:42,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:15:42,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -479822409, now seen corresponding path program 1 times [2023-11-23 21:15:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:42,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62875367] [2023-11-23 21:15:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-23 21:15:42,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62875367] [2023-11-23 21:15:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62875367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:42,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:42,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:42,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046510713] [2023-11-23 21:15:42,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:42,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:42,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:42,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:42,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:42,771 INFO L87 Difference]: Start difference. First operand 12673 states and 19375 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:44,068 INFO L93 Difference]: Finished difference Result 34438 states and 51668 transitions. [2023-11-23 21:15:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-11-23 21:15:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:44,168 INFO L225 Difference]: With dead ends: 34438 [2023-11-23 21:15:44,168 INFO L226 Difference]: Without dead ends: 23411 [2023-11-23 21:15:44,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:44,203 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3470 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:44,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23411 states. [2023-11-23 21:15:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23411 to 23313. [2023-11-23 21:15:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23313 states, 20363 states have (on average 1.4963905122035064) internal successors, (30471), 20429 states have internal predecessors, (30471), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-11-23 21:15:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23313 states to 23313 states and 34703 transitions. [2023-11-23 21:15:45,180 INFO L78 Accepts]: Start accepts. Automaton has 23313 states and 34703 transitions. Word has length 158 [2023-11-23 21:15:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:45,181 INFO L495 AbstractCegarLoop]: Abstraction has 23313 states and 34703 transitions. [2023-11-23 21:15:45,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:15:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23313 states and 34703 transitions. [2023-11-23 21:15:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 21:15:45,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:45,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:45,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:15:45,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:45,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash 459810688, now seen corresponding path program 1 times [2023-11-23 21:15:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:45,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142444152] [2023-11-23 21:15:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-23 21:15:45,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:45,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142444152] [2023-11-23 21:15:45,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142444152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:45,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:45,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674150643] [2023-11-23 21:15:45,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:45,371 INFO L87 Difference]: Start difference. First operand 23313 states and 34703 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)