./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ --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 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:48,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:48,440 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:48,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:48,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:48,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:48,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:48,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:48,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:48,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:48,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:48,476 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:48,477 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:48,477 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:48,478 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:48,478 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:48,479 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:48,479 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:48,480 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:48,481 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:48,481 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:48,482 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:48,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:48,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:48,483 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:48,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:48,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:48,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:48,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:48,485 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:48,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:48,486 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:48,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:48,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:48,487 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:48,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:48,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:48,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:48,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:48,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:48,489 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:48,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:48,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:48,490 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:48,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:48,490 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_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 [2023-11-19 05:03:48,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:48,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:48,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:48,751 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:48,753 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:48,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2023-11-19 05:03:51,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:52,706 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:52,707 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2023-11-19 05:03:52,763 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/data/5d3874566/0b328fab0eae4529a6a773db31afd1aa/FLAGe4e850c60 [2023-11-19 05:03:52,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/data/5d3874566/0b328fab0eae4529a6a773db31afd1aa [2023-11-19 05:03:52,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:52,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:52,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:52,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:52,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:52,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:52" (1/1) ... [2023-11-19 05:03:52,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496b5dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:52, skipping insertion in model container [2023-11-19 05:03:52,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:52" (1/1) ... [2023-11-19 05:03:53,050 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:55,366 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_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2023-11-19 05:03:55,398 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_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2023-11-19 05:03:55,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:55,609 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:56,828 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_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2023-11-19 05:03:56,832 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_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2023-11-19 05:03:56,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:56,909 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:56,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56 WrapperNode [2023-11-19 05:03:56,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:56,911 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:56,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:56,912 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:56,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,538 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12634 [2023-11-19 05:03:57,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:57,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:57,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:57,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:57,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:57,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:58,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:58,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:58,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:58,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:58,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (1/1) ... [2023-11-19 05:03:58,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:58,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:58,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:58,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:03:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:03:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:03:58,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:03:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:03:58,123 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:03:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:03:58,124 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:03:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:03:58,124 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:03:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:03:58,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:03:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:03:58,125 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:03:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:58,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:58,229 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:58,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:04:08,058 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:04:10,171 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:04:10,172 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:04:10,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:10 BoogieIcfgContainer [2023-11-19 05:04:10,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:04:10,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:04:10,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:04:10,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:04:10,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:52" (1/3) ... [2023-11-19 05:04:10,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506dd6f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:10, skipping insertion in model container [2023-11-19 05:04:10,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:56" (2/3) ... [2023-11-19 05:04:10,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506dd6f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:10, skipping insertion in model container [2023-11-19 05:04:10,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:10" (3/3) ... [2023-11-19 05:04:10,210 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-2.c [2023-11-19 05:04:10,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:04:10,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:04:10,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:04:10,350 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;@3bef49b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:04:10,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:04:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 05:04:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 05:04:10,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:10,382 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] [2023-11-19 05:04:10,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:10,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash 956430364, now seen corresponding path program 1 times [2023-11-19 05:04:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42728470] [2023-11-19 05:04:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:10,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:10,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42728470] [2023-11-19 05:04:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42728470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:10,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:04:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390830391] [2023-11-19 05:04:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:10,925 INFO L87 Difference]: Start difference. First operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:04:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:11,810 INFO L93 Difference]: Finished difference Result 3523 states and 6896 transitions. [2023-11-19 05:04:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:04:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-19 05:04:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:11,838 INFO L225 Difference]: With dead ends: 3523 [2023-11-19 05:04:11,838 INFO L226 Difference]: Without dead ends: 1792 [2023-11-19 05:04:11,847 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 [2023-11-19 05:04:11,851 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3463 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 6388 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:11,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 6388 Invalid, 584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:04:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2023-11-19 05:04:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1791. [2023-11-19 05:04:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1747 states have (on average 1.953062392673154) internal successors, (3412), 1751 states have internal predecessors, (3412), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:04:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 3470 transitions. [2023-11-19 05:04:11,985 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 3470 transitions. Word has length 38 [2023-11-19 05:04:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:11,986 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 3470 transitions. [2023-11-19 05:04:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:04:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 3470 transitions. [2023-11-19 05:04:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:04:11,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:11,992 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:04:11,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:04:11,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:11,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1522037725, now seen corresponding path program 1 times [2023-11-19 05:04:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238686989] [2023-11-19 05:04:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:12,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238686989] [2023-11-19 05:04:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238686989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250606503] [2023-11-19 05:04:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:12,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:12,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:12,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:04:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:12,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:12,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:04:12,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250606503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:12,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:12,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211142500] [2023-11-19 05:04:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:12,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:12,521 INFO L87 Difference]: Start difference. First operand 1791 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:12,973 INFO L93 Difference]: Finished difference Result 2074 states and 3857 transitions. [2023-11-19 05:04:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2023-11-19 05:04:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:12,989 INFO L225 Difference]: With dead ends: 2074 [2023-11-19 05:04:12,989 INFO L226 Difference]: Without dead ends: 1929 [2023-11-19 05:04:12,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:12,992 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3359 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:12,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3274 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2023-11-19 05:04:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1923. [2023-11-19 05:04:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1845 states have (on average 1.9192411924119241) internal successors, (3541), 1850 states have internal predecessors, (3541), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 05:04:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 3643 transitions. [2023-11-19 05:04:13,063 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 3643 transitions. Word has length 68 [2023-11-19 05:04:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:13,063 INFO L495 AbstractCegarLoop]: Abstraction has 1923 states and 3643 transitions. [2023-11-19 05:04:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 3643 transitions. [2023-11-19 05:04:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:04:13,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:13,068 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:04:13,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:04:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:13,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2125768829, now seen corresponding path program 1 times [2023-11-19 05:04:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085262297] [2023-11-19 05:04:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:13,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:04:13,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085262297] [2023-11-19 05:04:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085262297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:04:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32536810] [2023-11-19 05:04:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:13,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:13,738 INFO L87 Difference]: Start difference. First operand 1923 states and 3643 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:04:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:14,794 INFO L93 Difference]: Finished difference Result 2485 states and 4385 transitions. [2023-11-19 05:04:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:04:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2023-11-19 05:04:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:14,816 INFO L225 Difference]: With dead ends: 2485 [2023-11-19 05:04:14,816 INFO L226 Difference]: Without dead ends: 2209 [2023-11-19 05:04:14,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:04:14,822 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3513 mSDsluCounter, 9369 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:14,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3524 Valid, 12528 Invalid, 1111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:04:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2023-11-19 05:04:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2171. [2023-11-19 05:04:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2027 states have (on average 1.8623581647755303) internal successors, (3775), 2034 states have internal predecessors, (3775), 94 states have call successors, (94), 49 states have call predecessors, (94), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 05:04:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3961 transitions. [2023-11-19 05:04:14,935 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3961 transitions. Word has length 68 [2023-11-19 05:04:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:14,937 INFO L495 AbstractCegarLoop]: Abstraction has 2171 states and 3961 transitions. [2023-11-19 05:04:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:04:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3961 transitions. [2023-11-19 05:04:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:04:14,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:14,947 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:04:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:04:14,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:14,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1060540184, now seen corresponding path program 1 times [2023-11-19 05:04:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:14,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910204026] [2023-11-19 05:04:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:04:15,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910204026] [2023-11-19 05:04:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910204026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417853132] [2023-11-19 05:04:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:15,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:15,061 INFO L87 Difference]: Start difference. First operand 2171 states and 3961 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:04:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:15,674 INFO L93 Difference]: Finished difference Result 2584 states and 4508 transitions. [2023-11-19 05:04:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2023-11-19 05:04:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:15,692 INFO L225 Difference]: With dead ends: 2584 [2023-11-19 05:04:15,692 INFO L226 Difference]: Without dead ends: 2304 [2023-11-19 05:04:15,694 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 [2023-11-19 05:04:15,699 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 37 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6343 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:15,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6343 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2023-11-19 05:04:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2241. [2023-11-19 05:04:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2089 states have (on average 1.8492101483963619) internal successors, (3863), 2096 states have internal predecessors, (3863), 98 states have call successors, (98), 53 states have call predecessors, (98), 52 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 05:04:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4057 transitions. [2023-11-19 05:04:15,814 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4057 transitions. Word has length 70 [2023-11-19 05:04:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:15,815 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4057 transitions. [2023-11-19 05:04:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:04:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4057 transitions. [2023-11-19 05:04:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:04:15,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:15,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:04:15,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:04:15,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:15,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2105142614, now seen corresponding path program 1 times [2023-11-19 05:04:15,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:15,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048850874] [2023-11-19 05:04:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:15,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:04:15,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048850874] [2023-11-19 05:04:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048850874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:15,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:15,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:15,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110349118] [2023-11-19 05:04:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:15,911 INFO L87 Difference]: Start difference. First operand 2241 states and 4057 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:16,391 INFO L93 Difference]: Finished difference Result 3133 states and 5240 transitions. [2023-11-19 05:04:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2023-11-19 05:04:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:16,409 INFO L225 Difference]: With dead ends: 3133 [2023-11-19 05:04:16,410 INFO L226 Difference]: Without dead ends: 2538 [2023-11-19 05:04:16,417 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 [2023-11-19 05:04:16,419 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3351 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:16,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3275 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2023-11-19 05:04:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2528. [2023-11-19 05:04:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2306 states have (on average 1.794882914137034) internal successors, (4139), 2315 states have internal predecessors, (4139), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-19 05:04:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 4421 transitions. [2023-11-19 05:04:16,542 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 4421 transitions. Word has length 89 [2023-11-19 05:04:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:16,542 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 4421 transitions. [2023-11-19 05:04:16,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 4421 transitions. [2023-11-19 05:04:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:04:16,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:16,553 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:04:16,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:16,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -6094009, now seen corresponding path program 1 times [2023-11-19 05:04:16,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:16,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184867581] [2023-11-19 05:04:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:16,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:04:16,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184867581] [2023-11-19 05:04:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184867581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612534951] [2023-11-19 05:04:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:16,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:16,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:04:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:16,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:16,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:16,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612534951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:04:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848813817] [2023-11-19 05:04:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:16,864 INFO L87 Difference]: Start difference. First operand 2528 states and 4421 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:17,420 INFO L93 Difference]: Finished difference Result 3313 states and 5463 transitions. [2023-11-19 05:04:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2023-11-19 05:04:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:17,438 INFO L225 Difference]: With dead ends: 3313 [2023-11-19 05:04:17,439 INFO L226 Difference]: Without dead ends: 2719 [2023-11-19 05:04:17,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:17,442 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 54 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6340 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:17,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6340 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2023-11-19 05:04:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2617. [2023-11-19 05:04:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2383 states have (on average 1.7838858581619808) internal successors, (4251), 2392 states have internal predecessors, (4251), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-19 05:04:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 4545 transitions. [2023-11-19 05:04:17,794 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 4545 transitions. Word has length 102 [2023-11-19 05:04:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:17,795 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 4545 transitions. [2023-11-19 05:04:17,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 4545 transitions. [2023-11-19 05:04:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:04:17,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:17,800 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:17,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:18,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:18,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 160573985, now seen corresponding path program 2 times [2023-11-19 05:04:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:18,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694309340] [2023-11-19 05:04:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:04:18,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694309340] [2023-11-19 05:04:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694309340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375650268] [2023-11-19 05:04:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:04:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:18,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:04:18,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:04:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:04:18,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:18,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:04:18,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:18,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375650268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:18,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:18,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:04:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678558691] [2023-11-19 05:04:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:18,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:18,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:18,468 INFO L87 Difference]: Start difference. First operand 2617 states and 4545 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:19,070 INFO L93 Difference]: Finished difference Result 3308 states and 5495 transitions. [2023-11-19 05:04:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-19 05:04:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:19,088 INFO L225 Difference]: With dead ends: 3308 [2023-11-19 05:04:19,089 INFO L226 Difference]: Without dead ends: 2625 [2023-11-19 05:04:19,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:19,093 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 95 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:19,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6332 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-11-19 05:04:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2613. [2023-11-19 05:04:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2379 states have (on average 1.776796973518285) internal successors, (4227), 2388 states have internal predecessors, (4227), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-19 05:04:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 4521 transitions. [2023-11-19 05:04:19,237 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 4521 transitions. Word has length 102 [2023-11-19 05:04:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:19,238 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 4521 transitions. [2023-11-19 05:04:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 4521 transitions. [2023-11-19 05:04:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:04:19,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:19,243 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:19,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:19,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:19,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1911045213, now seen corresponding path program 1 times [2023-11-19 05:04:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019570991] [2023-11-19 05:04:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:04:19,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019570991] [2023-11-19 05:04:19,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019570991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:19,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322041416] [2023-11-19 05:04:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:19,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:19,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:19,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:04:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:19,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:19,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:04:19,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322041416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:19,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:19,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:04:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247159810] [2023-11-19 05:04:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:19,963 INFO L87 Difference]: Start difference. First operand 2613 states and 4521 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:20,460 INFO L93 Difference]: Finished difference Result 3437 states and 5580 transitions. [2023-11-19 05:04:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-19 05:04:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:20,480 INFO L225 Difference]: With dead ends: 3437 [2023-11-19 05:04:20,481 INFO L226 Difference]: Without dead ends: 2789 [2023-11-19 05:04:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:20,485 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3361 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3361 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:20,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3361 Valid, 3178 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2023-11-19 05:04:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2789. [2023-11-19 05:04:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2527 states have (on average 1.738425009893154) internal successors, (4393), 2536 states have internal predecessors, (4393), 156 states have call successors, (156), 105 states have call predecessors, (156), 104 states have return successors, (154), 148 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-19 05:04:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 4703 transitions. [2023-11-19 05:04:20,642 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 4703 transitions. Word has length 102 [2023-11-19 05:04:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:20,643 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 4703 transitions. [2023-11-19 05:04:20,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 4703 transitions. [2023-11-19 05:04:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:20,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:20,649 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:20,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:20,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:20,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:20,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1735344922, now seen corresponding path program 1 times [2023-11-19 05:04:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:20,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796944105] [2023-11-19 05:04:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:20,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:04:21,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796944105] [2023-11-19 05:04:21,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796944105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098087349] [2023-11-19 05:04:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:21,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:21,146 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:21,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:04:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:21,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:21,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:04:21,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098087349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:21,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:21,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:04:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163258524] [2023-11-19 05:04:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:21,327 INFO L87 Difference]: Start difference. First operand 2789 states and 4703 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:21,956 INFO L93 Difference]: Finished difference Result 4363 states and 6696 transitions. [2023-11-19 05:04:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2023-11-19 05:04:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:21,979 INFO L225 Difference]: With dead ends: 4363 [2023-11-19 05:04:21,979 INFO L226 Difference]: Without dead ends: 3221 [2023-11-19 05:04:21,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:21,984 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 50 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6298 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:21,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6298 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2023-11-19 05:04:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2919. [2023-11-19 05:04:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2637 states have (on average 1.7235494880546076) internal successors, (4545), 2647 states have internal predecessors, (4545), 166 states have call successors, (166), 115 states have call predecessors, (166), 114 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-19 05:04:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 4875 transitions. [2023-11-19 05:04:22,316 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 4875 transitions. Word has length 103 [2023-11-19 05:04:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:22,317 INFO L495 AbstractCegarLoop]: Abstraction has 2919 states and 4875 transitions. [2023-11-19 05:04:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:04:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 4875 transitions. [2023-11-19 05:04:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:04:22,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:22,323 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:22,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:22,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:22,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash 414994351, now seen corresponding path program 1 times [2023-11-19 05:04:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:22,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283954417] [2023-11-19 05:04:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:04:22,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:22,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283954417] [2023-11-19 05:04:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283954417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:22,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298853964] [2023-11-19 05:04:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:22,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:22,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:04:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:22,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:04:22,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:04:23,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:23,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298853964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:23,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:23,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 05:04:23,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597167993] [2023-11-19 05:04:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:04:23,059 INFO L87 Difference]: Start difference. First operand 2919 states and 4875 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:04:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:23,694 INFO L93 Difference]: Finished difference Result 4015 states and 6270 transitions. [2023-11-19 05:04:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:04:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 105 [2023-11-19 05:04:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:23,722 INFO L225 Difference]: With dead ends: 4015 [2023-11-19 05:04:23,730 INFO L226 Difference]: Without dead ends: 3351 [2023-11-19 05:04:23,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:04:23,734 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3393 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:23,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3310 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2023-11-19 05:04:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3170. [2023-11-19 05:04:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 2855 states have (on average 1.6788091068301225) internal successors, (4793), 2867 states have internal predecessors, (4793), 176 states have call successors, (176), 138 states have call predecessors, (176), 137 states have return successors, (184), 165 states have call predecessors, (184), 174 states have call successors, (184) [2023-11-19 05:04:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 5153 transitions. [2023-11-19 05:04:23,900 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 5153 transitions. Word has length 105 [2023-11-19 05:04:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:23,900 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 5153 transitions. [2023-11-19 05:04:23,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:04:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 5153 transitions. [2023-11-19 05:04:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:04:23,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:23,906 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:23,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:24,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:04:24,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:24,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -448713182, now seen corresponding path program 1 times [2023-11-19 05:04:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067168755] [2023-11-19 05:04:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:04:24,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067168755] [2023-11-19 05:04:24,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067168755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920262880] [2023-11-19 05:04:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:24,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:24,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:24,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:04:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:24,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:24,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:24,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920262880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:04:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022595173] [2023-11-19 05:04:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:24,422 INFO L87 Difference]: Start difference. First operand 3170 states and 5153 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:24,978 INFO L93 Difference]: Finished difference Result 4497 states and 6834 transitions. [2023-11-19 05:04:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-19 05:04:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:24,992 INFO L225 Difference]: With dead ends: 4497 [2023-11-19 05:04:24,992 INFO L226 Difference]: Without dead ends: 3705 [2023-11-19 05:04:24,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:24,996 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 57 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:24,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6365 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-11-19 05:04:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3396. [2023-11-19 05:04:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3045 states have (on average 1.652216748768473) internal successors, (5031), 3057 states have internal predecessors, (5031), 194 states have call successors, (194), 156 states have call predecessors, (194), 155 states have return successors, (202), 183 states have call predecessors, (202), 192 states have call successors, (202) [2023-11-19 05:04:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5427 transitions. [2023-11-19 05:04:25,163 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5427 transitions. Word has length 106 [2023-11-19 05:04:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:25,163 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 5427 transitions. [2023-11-19 05:04:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5427 transitions. [2023-11-19 05:04:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:04:25,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:25,170 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:04:25,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:04:25,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:25,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -6801953, now seen corresponding path program 1 times [2023-11-19 05:04:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314456741] [2023-11-19 05:04:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:04:25,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314456741] [2023-11-19 05:04:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314456741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:25,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945922168] [2023-11-19 05:04:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:25,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:25,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:25,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:04:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:25,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:04:25,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 05:04:25,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945922168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:25,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-19 05:04:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177543130] [2023-11-19 05:04:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:25,785 INFO L87 Difference]: Start difference. First operand 3396 states and 5427 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:26,842 INFO L93 Difference]: Finished difference Result 5815 states and 8392 transitions. [2023-11-19 05:04:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:04:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2023-11-19 05:04:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:26,856 INFO L225 Difference]: With dead ends: 5815 [2023-11-19 05:04:26,857 INFO L226 Difference]: Without dead ends: 4068 [2023-11-19 05:04:26,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:04:26,862 INFO L413 NwaCegarLoop]: 3161 mSDtfsCounter, 3503 mSDsluCounter, 6258 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 9419 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:26,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3514 Valid, 9419 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:04:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2023-11-19 05:04:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 4064. [2023-11-19 05:04:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4064 states, 3571 states have (on average 1.582189862783534) internal successors, (5650), 3587 states have internal predecessors, (5650), 272 states have call successors, (272), 220 states have call predecessors, (272), 219 states have return successors, (283), 257 states have call predecessors, (283), 270 states have call successors, (283) [2023-11-19 05:04:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 6205 transitions. [2023-11-19 05:04:27,089 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 6205 transitions. Word has length 106 [2023-11-19 05:04:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 4064 states and 6205 transitions. [2023-11-19 05:04:27,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 6205 transitions. [2023-11-19 05:04:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 05:04:27,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:27,098 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:27,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:27,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:27,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:27,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash -424573334, now seen corresponding path program 1 times [2023-11-19 05:04:27,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471914713] [2023-11-19 05:04:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:04:27,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471914713] [2023-11-19 05:04:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471914713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:27,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598670385] [2023-11-19 05:04:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:27,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:27,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:27,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:27,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:04:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:27,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:04:27,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:04:27,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598670385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:27,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:27,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-11-19 05:04:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329994458] [2023-11-19 05:04:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:27,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:27,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:27,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:04:27,806 INFO L87 Difference]: Start difference. First operand 4064 states and 6205 transitions. Second operand has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:04:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:28,807 INFO L93 Difference]: Finished difference Result 5885 states and 8482 transitions. [2023-11-19 05:04:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:04:28,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 108 [2023-11-19 05:04:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:28,822 INFO L225 Difference]: With dead ends: 5885 [2023-11-19 05:04:28,822 INFO L226 Difference]: Without dead ends: 4199 [2023-11-19 05:04:28,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:04:28,828 INFO L413 NwaCegarLoop]: 3119 mSDtfsCounter, 3387 mSDsluCounter, 6197 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 9316 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:28,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3395 Valid, 9316 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:04:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2023-11-19 05:04:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3984. [2023-11-19 05:04:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3984 states, 3513 states have (on average 1.5747224594363791) internal successors, (5532), 3526 states have internal predecessors, (5532), 258 states have call successors, (258), 212 states have call predecessors, (258), 211 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2023-11-19 05:04:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 6058 transitions. [2023-11-19 05:04:29,061 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 6058 transitions. Word has length 108 [2023-11-19 05:04:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:29,062 INFO L495 AbstractCegarLoop]: Abstraction has 3984 states and 6058 transitions. [2023-11-19 05:04:29,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:04:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 6058 transitions. [2023-11-19 05:04:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 05:04:29,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:29,069 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:29,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:04:29,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1863565130, now seen corresponding path program 1 times [2023-11-19 05:04:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:29,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847964756] [2023-11-19 05:04:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:04:29,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847964756] [2023-11-19 05:04:29,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847964756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:29,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416659421] [2023-11-19 05:04:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:29,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:29,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:29,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:29,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:04:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:29,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:29,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:04:29,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416659421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:29,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:29,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-19 05:04:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193726014] [2023-11-19 05:04:29,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:29,563 INFO L87 Difference]: Start difference. First operand 3984 states and 6058 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:30,289 INFO L93 Difference]: Finished difference Result 5622 states and 8100 transitions. [2023-11-19 05:04:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 108 [2023-11-19 05:04:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:30,302 INFO L225 Difference]: With dead ends: 5622 [2023-11-19 05:04:30,302 INFO L226 Difference]: Without dead ends: 3994 [2023-11-19 05:04:30,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:30,307 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 81 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6370 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:30,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6370 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2023-11-19 05:04:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3964. [2023-11-19 05:04:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3493 states have (on average 1.557400515316347) internal successors, (5440), 3506 states have internal predecessors, (5440), 258 states have call successors, (258), 212 states have call predecessors, (258), 211 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2023-11-19 05:04:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 5966 transitions. [2023-11-19 05:04:30,532 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 5966 transitions. Word has length 108 [2023-11-19 05:04:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:30,532 INFO L495 AbstractCegarLoop]: Abstraction has 3964 states and 5966 transitions. [2023-11-19 05:04:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:04:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 5966 transitions. [2023-11-19 05:04:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 05:04:30,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:30,540 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-19 05:04:30,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:30,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1964414923, now seen corresponding path program 1 times [2023-11-19 05:04:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083912460] [2023-11-19 05:04:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:04:31,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083912460] [2023-11-19 05:04:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083912460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417150590] [2023-11-19 05:04:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:31,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:31,396 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:31,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:04:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:31,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:04:31,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:04:31,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417150590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:31,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-11-19 05:04:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133703384] [2023-11-19 05:04:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:31,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:04:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:04:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:04:31,663 INFO L87 Difference]: Start difference. First operand 3964 states and 5966 transitions. Second operand has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:04:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:32,788 INFO L93 Difference]: Finished difference Result 5531 states and 7847 transitions. [2023-11-19 05:04:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:04:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 113 [2023-11-19 05:04:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:32,801 INFO L225 Difference]: With dead ends: 5531 [2023-11-19 05:04:32,801 INFO L226 Difference]: Without dead ends: 4329 [2023-11-19 05:04:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:04:32,808 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 116 mSDsluCounter, 12790 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 16003 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:32,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 16003 Invalid, 1294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:04:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2023-11-19 05:04:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 4009. [2023-11-19 05:04:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3534 states have (on average 1.5543293718166384) internal successors, (5493), 3546 states have internal predecessors, (5493), 259 states have call successors, (259), 215 states have call predecessors, (259), 214 states have return successors, (268), 248 states have call predecessors, (268), 257 states have call successors, (268) [2023-11-19 05:04:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6020 transitions. [2023-11-19 05:04:33,161 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6020 transitions. Word has length 113 [2023-11-19 05:04:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:33,161 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6020 transitions. [2023-11-19 05:04:33,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:04:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6020 transitions. [2023-11-19 05:04:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 05:04:33,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:33,169 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 05:04:33,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac0eb3d-9352-4fdd-9b77-ea5d0d05626c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 05:04:33,397 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:33,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2062743679, now seen corresponding path program 1 times [2023-11-19 05:04:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073957593] [2023-11-19 05:04:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:33,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 05:04:33,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:33,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073957593] [2023-11-19 05:04:33,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073957593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:33,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:33,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:04:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358294208] [2023-11-19 05:04:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:33,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:04:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:04:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:33,675 INFO L87 Difference]: Start difference. First operand 4009 states and 6020 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)