./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX --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 eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:08:53,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:08:53,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:08:53,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:08:53,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:08:53,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:08:53,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:08:53,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:08:53,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:08:53,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:08:53,687 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:08:53,688 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:08:53,688 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:08:53,690 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:08:53,690 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:08:53,691 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:08:53,691 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:08:53,691 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:08:53,692 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:08:53,692 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:08:53,693 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:08:53,693 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:08:53,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:08:53,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:08:53,695 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:08:53,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:08:53,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:08:53,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:08:53,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:08:53,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:08:53,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:08:53,699 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:08:53,699 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:08:53,699 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:08:53,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:08:53,700 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:08:53,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:08:53,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:08:53,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:08:53,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:08:53,709 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:08:53,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:08:53,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:08:53,710 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:08:53,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:08:53,711 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_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 [2023-11-12 00:08:54,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:08:54,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:08:54,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:08:54,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:08:54,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:08:54,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2023-11-12 00:08:57,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:08:58,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:08:58,088 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2023-11-12 00:08:58,147 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/data/05a60ee6a/066696fc65324b1c91dddcf529fdab5a/FLAG2eed7182a [2023-11-12 00:08:58,165 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/data/05a60ee6a/066696fc65324b1c91dddcf529fdab5a [2023-11-12 00:08:58,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:08:58,173 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:08:58,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:08:58,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:08:58,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:08:58,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:08:58" (1/1) ... [2023-11-12 00:08:58,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486a4004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:58, skipping insertion in model container [2023-11-12 00:08:58,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:08:58" (1/1) ... [2023-11-12 00:08:58,476 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:09:00,807 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_f2240685-01a2-4c1e-b025-022783ab8333/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2023-11-12 00:09:00,841 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_f2240685-01a2-4c1e-b025-022783ab8333/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2023-11-12 00:09:01,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:09:01,310 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:09:02,524 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_f2240685-01a2-4c1e-b025-022783ab8333/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2023-11-12 00:09:02,528 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_f2240685-01a2-4c1e-b025-022783ab8333/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2023-11-12 00:09:02,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:09:02,640 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:09:02,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02 WrapperNode [2023-11-12 00:09:02,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:09:02,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:09:02,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:09:02,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:09:02,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:02,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,290 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13292 [2023-11-12 00:09:03,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:09:03,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:09:03,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:09:03,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:09:03,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,888 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:09:03,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:09:03,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:09:03,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:09:03,905 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (1/1) ... [2023-11-12 00:09:03,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:09:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:03,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:09:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:09:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:09:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:09:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:09:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:09:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:09:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:09:04,109 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:09:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:09:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:09:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:09:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:09:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:09:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:09:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:09:04,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:09:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:09:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:09:04,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:09:04,406 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:09:04,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:09:14,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:09:17,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:09:17,538 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-12 00:09:17,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:09:17 BoogieIcfgContainer [2023-11-12 00:09:17,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:09:17,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:09:17,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:09:17,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:09:17,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:08:58" (1/3) ... [2023-11-12 00:09:17,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7a42f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:09:17, skipping insertion in model container [2023-11-12 00:09:17,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:09:02" (2/3) ... [2023-11-12 00:09:17,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7a42f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:09:17, skipping insertion in model container [2023-11-12 00:09:17,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:09:17" (3/3) ... [2023-11-12 00:09:17,556 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.15.cil.c [2023-11-12 00:09:17,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:09:17,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:09:17,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:09:17,695 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;@2ad95732, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:09:17,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:09:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-12 00:09:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:09:17,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:17,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:17,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:17,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash -436543055, now seen corresponding path program 1 times [2023-11-12 00:09:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357753841] [2023-11-12 00:09:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:09:18,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357753841] [2023-11-12 00:09:18,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357753841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:18,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:09:18,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:09:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439403929] [2023-11-12 00:09:18,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:09:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:09:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:09:18,626 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:09:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:19,995 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2023-11-12 00:09:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:09:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 71 [2023-11-12 00:09:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:20,025 INFO L225 Difference]: With dead ends: 3919 [2023-11-12 00:09:20,025 INFO L226 Difference]: Without dead ends: 2056 [2023-11-12 00:09:20,036 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 [2023-11-12 00:09:20,040 INFO L413 NwaCegarLoop]: 3577 mSDtfsCounter, 3848 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7050 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:20,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7050 Invalid, 758 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:09:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-12 00:09:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2023-11-12 00:09:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-12 00:09:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2023-11-12 00:09:20,210 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2023-11-12 00:09:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:20,211 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2023-11-12 00:09:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:09:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2023-11-12 00:09:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:20,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:20,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:20,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:09:20,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:20,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1817679812, now seen corresponding path program 1 times [2023-11-12 00:09:20,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:20,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875670058] [2023-11-12 00:09:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:20,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875670058] [2023-11-12 00:09:20,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875670058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888322768] [2023-11-12 00:09:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:20,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:20,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:20,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:09:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:21,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:21,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:09:21,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888322768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:21,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513007937] [2023-11-12 00:09:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:21,239 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:09:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:21,951 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2023-11-12 00:09:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 145 [2023-11-12 00:09:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:21,974 INFO L225 Difference]: With dead ends: 2866 [2023-11-12 00:09:21,974 INFO L226 Difference]: Without dead ends: 2457 [2023-11-12 00:09:21,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:21,979 INFO L413 NwaCegarLoop]: 3389 mSDtfsCounter, 3547 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:21,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3651 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:09:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2023-11-12 00:09:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2023-11-12 00:09:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-12 00:09:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2023-11-12 00:09:22,112 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2023-11-12 00:09:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:22,113 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2023-11-12 00:09:22,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:09:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2023-11-12 00:09:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:22,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:22,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:22,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:22,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:22,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:22,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1295299398, now seen corresponding path program 1 times [2023-11-12 00:09:22,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:22,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404106193] [2023-11-12 00:09:22,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:22,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404106193] [2023-11-12 00:09:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404106193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:22,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194820691] [2023-11-12 00:09:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:22,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:22,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:22,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:09:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:23,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:23,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:09:23,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194820691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:23,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570136238] [2023-11-12 00:09:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:23,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:23,208 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:09:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:23,870 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2023-11-12 00:09:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 145 [2023-11-12 00:09:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:23,893 INFO L225 Difference]: With dead ends: 4048 [2023-11-12 00:09:23,893 INFO L226 Difference]: Without dead ends: 3243 [2023-11-12 00:09:23,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:23,898 INFO L413 NwaCegarLoop]: 3344 mSDtfsCounter, 3538 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:23,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3606 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:09:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2023-11-12 00:09:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2023-11-12 00:09:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-12 00:09:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2023-11-12 00:09:24,038 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2023-11-12 00:09:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:24,038 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2023-11-12 00:09:24,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:09:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2023-11-12 00:09:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:24,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:24,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:24,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:24,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:24,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -50578044, now seen corresponding path program 1 times [2023-11-12 00:09:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:24,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808199175] [2023-11-12 00:09:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:24,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:24,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808199175] [2023-11-12 00:09:24,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808199175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:24,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891787837] [2023-11-12 00:09:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:24,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:24,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:24,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:09:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:24,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:24,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:09:24,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:24,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891787837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:24,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:24,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700154879] [2023-11-12 00:09:24,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:24,811 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:09:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:25,488 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2023-11-12 00:09:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 145 [2023-11-12 00:09:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:25,526 INFO L225 Difference]: With dead ends: 6388 [2023-11-12 00:09:25,526 INFO L226 Difference]: Without dead ends: 4799 [2023-11-12 00:09:25,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:25,535 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 3559 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3647 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:25,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3647 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:09:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2023-11-12 00:09:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2023-11-12 00:09:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-12 00:09:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2023-11-12 00:09:25,772 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2023-11-12 00:09:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:25,774 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2023-11-12 00:09:25,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:09:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2023-11-12 00:09:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:25,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:25,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:25,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:25,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:25,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:25,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1787962886, now seen corresponding path program 1 times [2023-11-12 00:09:25,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:25,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325196962] [2023-11-12 00:09:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:26,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325196962] [2023-11-12 00:09:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325196962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088493651] [2023-11-12 00:09:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:26,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:26,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:09:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:26,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:26,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 00:09:26,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088493651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:26,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:26,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439797936] [2023-11-12 00:09:26,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:26,624 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:09:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:27,609 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2023-11-12 00:09:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 145 [2023-11-12 00:09:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:27,671 INFO L225 Difference]: With dead ends: 11020 [2023-11-12 00:09:27,671 INFO L226 Difference]: Without dead ends: 7879 [2023-11-12 00:09:27,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:27,690 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3565 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:27,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3627 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:09:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2023-11-12 00:09:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2023-11-12 00:09:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-12 00:09:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2023-11-12 00:09:28,088 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2023-11-12 00:09:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:28,088 INFO L495 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2023-11-12 00:09:28,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:09:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2023-11-12 00:09:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:28,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:28,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:28,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:28,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:28,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 386147592, now seen corresponding path program 1 times [2023-11-12 00:09:28,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:28,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815192875] [2023-11-12 00:09:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:28,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815192875] [2023-11-12 00:09:28,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815192875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891466562] [2023-11-12 00:09:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:28,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:09:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:28,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:28,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:09:28,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:28,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891466562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:28,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:28,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572345599] [2023-11-12 00:09:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:28,902 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2023-11-12 00:09:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:29,837 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2023-11-12 00:09:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 145 [2023-11-12 00:09:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:29,913 INFO L225 Difference]: With dead ends: 20188 [2023-11-12 00:09:29,913 INFO L226 Difference]: Without dead ends: 13975 [2023-11-12 00:09:29,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:29,943 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3553 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:29,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:09:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2023-11-12 00:09:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2023-11-12 00:09:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-12 00:09:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2023-11-12 00:09:30,966 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2023-11-12 00:09:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:30,967 INFO L495 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2023-11-12 00:09:30,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2023-11-12 00:09:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2023-11-12 00:09:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:31,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:31,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:31,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:31,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:31,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1128994570, now seen corresponding path program 1 times [2023-11-12 00:09:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:31,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455362204] [2023-11-12 00:09:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:31,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455362204] [2023-11-12 00:09:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455362204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:31,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945350543] [2023-11-12 00:09:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:31,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:31,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:31,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:09:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:31,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:31,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:09:31,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:31,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945350543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:31,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:31,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589383867] [2023-11-12 00:09:31,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:31,830 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:09:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:33,338 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2023-11-12 00:09:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 145 [2023-11-12 00:09:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:33,445 INFO L225 Difference]: With dead ends: 38332 [2023-11-12 00:09:33,445 INFO L226 Difference]: Without dead ends: 26039 [2023-11-12 00:09:33,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:33,498 INFO L413 NwaCegarLoop]: 3379 mSDtfsCounter, 3568 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3641 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:33,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3641 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:09:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2023-11-12 00:09:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2023-11-12 00:09:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-12 00:09:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2023-11-12 00:09:34,785 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2023-11-12 00:09:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:34,785 INFO L495 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2023-11-12 00:09:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:09:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2023-11-12 00:09:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:09:34,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:34,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:34,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:35,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:35,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -383409976, now seen corresponding path program 1 times [2023-11-12 00:09:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:35,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107168513] [2023-11-12 00:09:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:09:35,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107168513] [2023-11-12 00:09:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107168513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839107591] [2023-11-12 00:09:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:35,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:35,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:35,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2240685-01a2-4c1e-b025-022783ab8333/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:09:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:35,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:09:35,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:09:35,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839107591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:35,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:35,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:09:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029026747] [2023-11-12 00:09:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:09:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:09:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:35,792 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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) [2023-11-12 00:09:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:37,962 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2023-11-12 00:09:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:09:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 145 [2023-11-12 00:09:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:38,215 INFO L225 Difference]: With dead ends: 74236 [2023-11-12 00:09:38,215 INFO L226 Difference]: Without dead ends: 49911 [2023-11-12 00:09:38,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:09:38,337 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3541 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:38,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:09:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states.