./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 056b77142139934f04c5cd96553e37eaed588abf60608a3beeeec0aa5c00ccfe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:04:25,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:04:25,569 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:04:25,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:04:25,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:04:25,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:04:25,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:04:25,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:04:25,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:04:25,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:04:25,629 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:04:25,629 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:04:25,630 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:04:25,630 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:04:25,631 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:04:25,631 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:04:25,632 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:04:25,632 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:04:25,633 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:04:25,633 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:04:25,634 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:04:25,635 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:04:25,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:04:25,636 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:04:25,636 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:04:25,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:04:25,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:04:25,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:04:25,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:04:25,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:04:25,643 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:04:25,643 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:04:25,643 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:04:25,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:04:25,644 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:04:25,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:04:25,645 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:04:25,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:04:25,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:04:25,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:04:25,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:04:25,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:04:25,651 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:04:25,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:04:25,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:04:25,653 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:04:25,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:04:25,654 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_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 056b77142139934f04c5cd96553e37eaed588abf60608a3beeeec0aa5c00ccfe [2024-11-09 07:04:25,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:04:26,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:04:26,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:04:26,014 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:04:26,016 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:04:26,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c Unable to find full path for "g++" [2024-11-09 07:04:28,608 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:04:29,435 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:04:29,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c [2024-11-09 07:04:29,496 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/data/fb6549520/0214516a5f58433e8d9bbf24dd722c78/FLAG87498b5d7 [2024-11-09 07:04:29,515 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/data/fb6549520/0214516a5f58433e8d9bbf24dd722c78 [2024-11-09 07:04:29,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:04:29,520 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:04:29,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:04:29,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:04:29,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:04:29,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:04:29" (1/1) ... [2024-11-09 07:04:29,534 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62aabc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:29, skipping insertion in model container [2024-11-09 07:04:29,534 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:04:29" (1/1) ... [2024-11-09 07:04:29,893 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:04:32,711 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c[377612,377625] [2024-11-09 07:04:32,779 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c[383339,383352] [2024-11-09 07:04:33,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:04:33,289 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:04:34,904 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c[377612,377625] [2024-11-09 07:04:34,918 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/sv-benchmarks/c/combinations/Problem05_label47+token_ring.04.cil-1.c[383339,383352] [2024-11-09 07:04:34,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:04:35,056 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:04:35,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35 WrapperNode [2024-11-09 07:04:35,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:04:35,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:04:35,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:04:35,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:04:35,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:35,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:35,723 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12745 [2024-11-09 07:04:35,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:04:35,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:04:35,725 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:04:35,725 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:04:35,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:35,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:35,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:35,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:04:36,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:04:36,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:04:36,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:04:36,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (1/1) ... [2024-11-09 07:04:36,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:04:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:04:36,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:04:36,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:04:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:04:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 07:04:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 07:04:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 07:04:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 07:04:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 07:04:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 07:04:36,870 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 07:04:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 07:04:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 07:04:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 07:04:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 07:04:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 07:04:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:04:36,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:04:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:04:37,089 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:04:37,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:04:49,507 INFO L? ?]: Removed 1707 outVars from TransFormulas that were not future-live. [2024-11-09 07:04:49,508 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:04:52,640 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:04:52,640 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-09 07:04:52,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:04:52 BoogieIcfgContainer [2024-11-09 07:04:52,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:04:52,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:04:52,647 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:04:52,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:04:52,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:04:29" (1/3) ... [2024-11-09 07:04:52,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb5be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:04:52, skipping insertion in model container [2024-11-09 07:04:52,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:04:35" (2/3) ... [2024-11-09 07:04:52,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb5be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:04:52, skipping insertion in model container [2024-11-09 07:04:52,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:04:52" (3/3) ... [2024-11-09 07:04:52,657 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.04.cil-1.c [2024-11-09 07:04:52,684 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:04:52,685 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 07:04:52,828 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:04:52,837 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@220612a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:04:52,837 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 07:04:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1721 states have (on average 1.9697850087158628) internal successors, (3390), 1724 states have internal predecessors, (3390), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 07:04:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 07:04:52,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:04:52,865 INFO L215 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] [2024-11-09 07:04:52,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:04:52,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:04:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1410823448, now seen corresponding path program 1 times [2024-11-09 07:04:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:04:52,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003130939] [2024-11-09 07:04:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:52,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:04:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:04:53,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:04:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003130939] [2024-11-09 07:04:53,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003130939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:04:53,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:04:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:04:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765827525] [2024-11-09 07:04:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:04:53,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:04:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:04:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:04:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:04:53,557 INFO L87 Difference]: Start difference. First operand has 1748 states, 1721 states have (on average 1.9697850087158628) internal successors, (3390), 1724 states have internal predecessors, (3390), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:04:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:04:54,792 INFO L93 Difference]: Finished difference Result 3584 states and 6994 transitions. [2024-11-09 07:04:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:04:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-09 07:04:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:04:54,831 INFO L225 Difference]: With dead ends: 3584 [2024-11-09 07:04:54,831 INFO L226 Difference]: Without dead ends: 1835 [2024-11-09 07:04:54,843 INFO L431 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 [2024-11-09 07:04:54,847 INFO L432 NwaCegarLoop]: 3281 mSDtfsCounter, 3525 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:04:54,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 6496 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:04:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2024-11-09 07:04:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1834. [2024-11-09 07:04:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1788 states have (on average 1.9429530201342282) internal successors, (3474), 1791 states have internal predecessors, (3474), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-09 07:04:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 3538 transitions. [2024-11-09 07:04:55,013 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 3538 transitions. Word has length 43 [2024-11-09 07:04:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:04:55,013 INFO L471 AbstractCegarLoop]: Abstraction has 1834 states and 3538 transitions. [2024-11-09 07:04:55,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:04:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 3538 transitions. [2024-11-09 07:04:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 07:04:55,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:04:55,019 INFO L215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:04:55,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:04:55,020 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:04:55,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:04:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1232804049, now seen corresponding path program 1 times [2024-11-09 07:04:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:04:55,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267537821] [2024-11-09 07:04:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:04:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:04:55,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:04:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267537821] [2024-11-09 07:04:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267537821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:04:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087218227] [2024-11-09 07:04:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:55,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:04:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:04:55,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:04:55,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:04:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:55,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:04:55,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:04:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 07:04:55,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:04:55,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087218227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:04:55,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:04:55,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:04:55,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653485491] [2024-11-09 07:04:55,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:04:55,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:04:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:04:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:04:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:04:55,657 INFO L87 Difference]: Start difference. First operand 1834 states and 3538 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:04:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:04:56,352 INFO L93 Difference]: Finished difference Result 2203 states and 4065 transitions. [2024-11-09 07:04:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:04:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 07:04:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:04:56,367 INFO L225 Difference]: With dead ends: 2203 [2024-11-09 07:04:56,367 INFO L226 Difference]: Without dead ends: 2015 [2024-11-09 07:04:56,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:04:56,370 INFO L432 NwaCegarLoop]: 3211 mSDtfsCounter, 3386 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 3321 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:04:56,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3321 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:04:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2024-11-09 07:04:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 2011. [2024-11-09 07:04:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 1927 states have (on average 1.9019200830306175) internal successors, (3665), 1931 states have internal predecessors, (3665), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-09 07:04:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 3781 transitions. [2024-11-09 07:04:56,477 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 3781 transitions. Word has length 81 [2024-11-09 07:04:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:04:56,477 INFO L471 AbstractCegarLoop]: Abstraction has 2011 states and 3781 transitions. [2024-11-09 07:04:56,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:04:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 3781 transitions. [2024-11-09 07:04:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 07:04:56,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:04:56,486 INFO L215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:04:56,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:04:56,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:04:56,687 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:04:56,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:04:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash -512710897, now seen corresponding path program 1 times [2024-11-09 07:04:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:04:56,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211711384] [2024-11-09 07:04:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:56,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:04:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:04:56,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:04:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211711384] [2024-11-09 07:04:56,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211711384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:04:56,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008728984] [2024-11-09 07:04:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:56,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:04:56,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:04:56,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:04:56,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:04:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:57,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:04:57,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:04:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:04:57,103 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:04:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008728984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:04:57,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:04:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:04:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46087765] [2024-11-09 07:04:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:04:57,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:04:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:04:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:04:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:04:57,110 INFO L87 Difference]: Start difference. First operand 2011 states and 3781 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:04:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:04:57,786 INFO L93 Difference]: Finished difference Result 2728 states and 4796 transitions. [2024-11-09 07:04:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:04:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2024-11-09 07:04:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:04:57,804 INFO L225 Difference]: With dead ends: 2728 [2024-11-09 07:04:57,804 INFO L226 Difference]: Without dead ends: 2363 [2024-11-09 07:04:57,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:04:57,810 INFO L432 NwaCegarLoop]: 3209 mSDtfsCounter, 3389 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:04:57,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3319 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:04:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2024-11-09 07:04:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2357. [2024-11-09 07:04:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2199 states have (on average 1.834924965893588) internal successors, (4035), 2205 states have internal predecessors, (4035), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 07:04:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 4251 transitions. [2024-11-09 07:04:57,926 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 4251 transitions. Word has length 81 [2024-11-09 07:04:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:04:57,927 INFO L471 AbstractCegarLoop]: Abstraction has 2357 states and 4251 transitions. [2024-11-09 07:04:57,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:04:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 4251 transitions. [2024-11-09 07:04:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 07:04:57,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:04:57,933 INFO L215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:04:57,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:04:58,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:04:58,135 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:04:58,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:04:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1579263185, now seen corresponding path program 1 times [2024-11-09 07:04:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:04:58,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45332453] [2024-11-09 07:04:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:04:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 07:04:58,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:04:58,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45332453] [2024-11-09 07:04:58,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45332453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:04:58,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:04:58,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:04:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882416080] [2024-11-09 07:04:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:04:58,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:04:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:04:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:04:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:04:58,290 INFO L87 Difference]: Start difference. First operand 2357 states and 4251 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 07:04:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:04:59,165 INFO L93 Difference]: Finished difference Result 2919 states and 5040 transitions. [2024-11-09 07:04:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:04:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2024-11-09 07:04:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:04:59,189 INFO L225 Difference]: With dead ends: 2919 [2024-11-09 07:04:59,189 INFO L226 Difference]: Without dead ends: 2553 [2024-11-09 07:04:59,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:04:59,196 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 59 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6417 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:04:59,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6417 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:04:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2024-11-09 07:04:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2481. [2024-11-09 07:04:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2315 states have (on average 1.8207343412526997) internal successors, (4215), 2321 states have internal predecessors, (4215), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-09 07:04:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4439 transitions. [2024-11-09 07:04:59,353 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4439 transitions. Word has length 81 [2024-11-09 07:04:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:04:59,355 INFO L471 AbstractCegarLoop]: Abstraction has 2481 states and 4439 transitions. [2024-11-09 07:04:59,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 07:04:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4439 transitions. [2024-11-09 07:04:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 07:04:59,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:04:59,364 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:04:59,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:04:59,365 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:04:59,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:04:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash 886844041, now seen corresponding path program 1 times [2024-11-09 07:04:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:04:59,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820147971] [2024-11-09 07:04:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:04:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:04:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:04:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 07:04:59,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:04:59,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820147971] [2024-11-09 07:04:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820147971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:04:59,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:04:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:04:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326856064] [2024-11-09 07:04:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:04:59,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:04:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:04:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:04:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:04:59,518 INFO L87 Difference]: Start difference. First operand 2481 states and 4439 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:05:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:00,250 INFO L93 Difference]: Finished difference Result 4114 states and 6748 transitions. [2024-11-09 07:05:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2024-11-09 07:05:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:00,272 INFO L225 Difference]: With dead ends: 4114 [2024-11-09 07:05:00,275 INFO L226 Difference]: Without dead ends: 3279 [2024-11-09 07:05:00,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:05:00,283 INFO L432 NwaCegarLoop]: 3181 mSDtfsCounter, 3379 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3379 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:00,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3379 Valid, 3291 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2024-11-09 07:05:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3265. [2024-11-09 07:05:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 2947 states have (on average 1.7234475738038684) internal successors, (5079), 2957 states have internal predecessors, (5079), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2024-11-09 07:05:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 5503 transitions. [2024-11-09 07:05:00,534 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 5503 transitions. Word has length 108 [2024-11-09 07:05:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:00,539 INFO L471 AbstractCegarLoop]: Abstraction has 3265 states and 5503 transitions. [2024-11-09 07:05:00,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:05:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 5503 transitions. [2024-11-09 07:05:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 07:05:00,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:00,555 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:00,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:05:00,556 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:00,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 57997085, now seen corresponding path program 1 times [2024-11-09 07:05:00,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:00,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129167037] [2024-11-09 07:05:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:00,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 07:05:00,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:00,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129167037] [2024-11-09 07:05:00,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129167037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:00,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:05:00,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:05:00,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172346022] [2024-11-09 07:05:00,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:00,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:00,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:05:00,709 INFO L87 Difference]: Start difference. First operand 3265 states and 5503 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:05:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:01,490 INFO L93 Difference]: Finished difference Result 6430 states and 9916 transitions. [2024-11-09 07:05:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 108 [2024-11-09 07:05:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:01,524 INFO L225 Difference]: With dead ends: 6430 [2024-11-09 07:05:01,525 INFO L226 Difference]: Without dead ends: 4811 [2024-11-09 07:05:01,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:05:01,535 INFO L432 NwaCegarLoop]: 3194 mSDtfsCounter, 3382 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 3304 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:01,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 3304 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:05:01,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2024-11-09 07:05:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4785. [2024-11-09 07:05:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4171 states have (on average 1.6128026852073842) internal successors, (6727), 4189 states have internal predecessors, (6727), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2024-11-09 07:05:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 7535 transitions. [2024-11-09 07:05:01,873 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 7535 transitions. Word has length 108 [2024-11-09 07:05:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:01,874 INFO L471 AbstractCegarLoop]: Abstraction has 4785 states and 7535 transitions. [2024-11-09 07:05:01,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:05:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 7535 transitions. [2024-11-09 07:05:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:01,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:01,892 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:01,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:05:01,892 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:01,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -367469933, now seen corresponding path program 1 times [2024-11-09 07:05:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:01,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484291886] [2024-11-09 07:05:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:01,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 07:05:02,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484291886] [2024-11-09 07:05:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484291886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:02,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567092160] [2024-11-09 07:05:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:02,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:02,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:02,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:05:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:02,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:05:02,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:05:02,396 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567092160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:02,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:02,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:05:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414368445] [2024-11-09 07:05:02,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:02,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:02,400 INFO L87 Difference]: Start difference. First operand 4785 states and 7535 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:03,422 INFO L93 Difference]: Finished difference Result 7421 states and 11217 transitions. [2024-11-09 07:05:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:03,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 07:05:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:03,467 INFO L225 Difference]: With dead ends: 7421 [2024-11-09 07:05:03,468 INFO L226 Difference]: Without dead ends: 5803 [2024-11-09 07:05:03,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:03,478 INFO L432 NwaCegarLoop]: 3234 mSDtfsCounter, 66 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6412 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:03,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6412 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2024-11-09 07:05:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 5417. [2024-11-09 07:05:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5417 states, 4755 states have (on average 1.5997896950578339) internal successors, (7607), 4773 states have internal predecessors, (7607), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2024-11-09 07:05:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5417 states to 5417 states and 8463 transitions. [2024-11-09 07:05:03,771 INFO L78 Accepts]: Start accepts. Automaton has 5417 states and 8463 transitions. Word has length 123 [2024-11-09 07:05:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:03,772 INFO L471 AbstractCegarLoop]: Abstraction has 5417 states and 8463 transitions. [2024-11-09 07:05:03,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5417 states and 8463 transitions. [2024-11-09 07:05:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:03,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:03,789 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:03,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:05:03,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:03,990 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:03,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1626141202, now seen corresponding path program 1 times [2024-11-09 07:05:03,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:03,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051792370] [2024-11-09 07:05:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:03,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 07:05:04,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051792370] [2024-11-09 07:05:04,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051792370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:04,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294997780] [2024-11-09 07:05:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:04,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:04,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:04,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:05:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:04,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:05:04,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:05:04,443 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294997780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:04,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:04,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:05:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915683519] [2024-11-09 07:05:04,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:04,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:04,446 INFO L87 Difference]: Start difference. First operand 5417 states and 8463 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:05,329 INFO L93 Difference]: Finished difference Result 8681 states and 13037 transitions. [2024-11-09 07:05:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 07:05:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:05,392 INFO L225 Difference]: With dead ends: 8681 [2024-11-09 07:05:05,393 INFO L226 Difference]: Without dead ends: 6753 [2024-11-09 07:05:05,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:05,402 INFO L432 NwaCegarLoop]: 3251 mSDtfsCounter, 72 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:05,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 6431 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2024-11-09 07:05:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6311. [2024-11-09 07:05:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6311 states, 5577 states have (on average 1.5813161197776582) internal successors, (8819), 5595 states have internal predecessors, (8819), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2024-11-09 07:05:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 9747 transitions. [2024-11-09 07:05:05,775 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 9747 transitions. Word has length 123 [2024-11-09 07:05:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:05,776 INFO L471 AbstractCegarLoop]: Abstraction has 6311 states and 9747 transitions. [2024-11-09 07:05:05,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 9747 transitions. [2024-11-09 07:05:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:05,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:05,794 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:05,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:05:05,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:05,995 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:05,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash -206026675, now seen corresponding path program 1 times [2024-11-09 07:05:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:05,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115510642] [2024-11-09 07:05:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 07:05:06,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:06,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115510642] [2024-11-09 07:05:06,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115510642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:06,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598309304] [2024-11-09 07:05:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:06,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:06,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:05:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:06,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:05:06,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:05:06,466 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:06,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598309304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:06,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:06,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:05:06,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169168980] [2024-11-09 07:05:06,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:06,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:06,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:06,473 INFO L87 Difference]: Start difference. First operand 6311 states and 9747 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:07,559 INFO L93 Difference]: Finished difference Result 10581 states and 15767 transitions. [2024-11-09 07:05:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 07:05:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:07,593 INFO L225 Difference]: With dead ends: 10581 [2024-11-09 07:05:07,593 INFO L226 Difference]: Without dead ends: 8170 [2024-11-09 07:05:07,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:07,604 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 84 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:07,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6441 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:05:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2024-11-09 07:05:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 7616. [2024-11-09 07:05:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7616 states, 6774 states have (on average 1.559639799232359) internal successors, (10565), 6792 states have internal predecessors, (10565), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2024-11-09 07:05:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7616 states to 7616 states and 11601 transitions. [2024-11-09 07:05:07,963 INFO L78 Accepts]: Start accepts. Automaton has 7616 states and 11601 transitions. Word has length 123 [2024-11-09 07:05:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:07,963 INFO L471 AbstractCegarLoop]: Abstraction has 7616 states and 11601 transitions. [2024-11-09 07:05:07,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7616 states and 11601 transitions. [2024-11-09 07:05:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:07,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:07,983 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:08,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:05:08,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:08,184 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:08,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1676707788, now seen corresponding path program 1 times [2024-11-09 07:05:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:08,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707620661] [2024-11-09 07:05:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:08,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 07:05:08,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707620661] [2024-11-09 07:05:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707620661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666024865] [2024-11-09 07:05:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:08,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:05:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:08,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:05:08,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:05:08,598 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666024865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:08,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:08,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:05:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295210513] [2024-11-09 07:05:08,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:08,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:08,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:08,604 INFO L87 Difference]: Start difference. First operand 7616 states and 11601 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:09,505 INFO L93 Difference]: Finished difference Result 13000 states and 19160 transitions. [2024-11-09 07:05:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2024-11-09 07:05:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:09,541 INFO L225 Difference]: With dead ends: 13000 [2024-11-09 07:05:09,541 INFO L226 Difference]: Without dead ends: 9950 [2024-11-09 07:05:09,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:05:09,552 INFO L432 NwaCegarLoop]: 3256 mSDtfsCounter, 78 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:09,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6436 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2024-11-09 07:05:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9452. [2024-11-09 07:05:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9452 states, 8448 states have (on average 1.531841856060606) internal successors, (12941), 8466 states have internal predecessors, (12941), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-09 07:05:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9452 states to 9452 states and 14139 transitions. [2024-11-09 07:05:10,109 INFO L78 Accepts]: Start accepts. Automaton has 9452 states and 14139 transitions. Word has length 123 [2024-11-09 07:05:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:10,109 INFO L471 AbstractCegarLoop]: Abstraction has 9452 states and 14139 transitions. [2024-11-09 07:05:10,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 9452 states and 14139 transitions. [2024-11-09 07:05:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:10,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:10,137 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:10,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:05:10,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:05:10,338 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:10,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash -831967189, now seen corresponding path program 2 times [2024-11-09 07:05:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196576748] [2024-11-09 07:05:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:10,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:10,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196576748] [2024-11-09 07:05:10,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196576748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:10,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261553942] [2024-11-09 07:05:10,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:05:10,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:10,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:10,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:10,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:05:10,812 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:05:10,812 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:05:10,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:05:10,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 07:05:10,850 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:10,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261553942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:10,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:10,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062120066] [2024-11-09 07:05:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:10,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:10,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:10,853 INFO L87 Difference]: Start difference. First operand 9452 states and 14139 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:11,823 INFO L93 Difference]: Finished difference Result 14410 states and 21197 transitions. [2024-11-09 07:05:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 07:05:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:11,869 INFO L225 Difference]: With dead ends: 14410 [2024-11-09 07:05:11,869 INFO L226 Difference]: Without dead ends: 9470 [2024-11-09 07:05:11,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:11,883 INFO L432 NwaCegarLoop]: 3262 mSDtfsCounter, 125 mSDsluCounter, 3168 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6430 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:11,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6430 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9470 states. [2024-11-09 07:05:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9470 to 9322. [2024-11-09 07:05:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9322 states, 8318 states have (on average 1.5187545082952634) internal successors, (12633), 8336 states have internal predecessors, (12633), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-09 07:05:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9322 states to 9322 states and 13831 transitions. [2024-11-09 07:05:12,282 INFO L78 Accepts]: Start accepts. Automaton has 9322 states and 13831 transitions. Word has length 123 [2024-11-09 07:05:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:12,282 INFO L471 AbstractCegarLoop]: Abstraction has 9322 states and 13831 transitions. [2024-11-09 07:05:12,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 9322 states and 13831 transitions. [2024-11-09 07:05:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:12,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:12,301 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:12,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:05:12,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:12,507 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:12,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash -283941591, now seen corresponding path program 1 times [2024-11-09 07:05:12,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:12,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490474233] [2024-11-09 07:05:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:12,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490474233] [2024-11-09 07:05:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490474233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361053851] [2024-11-09 07:05:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:12,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:13,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:05:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:13,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:05:13,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 07:05:13,266 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:13,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361053851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:13,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:13,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:13,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71562978] [2024-11-09 07:05:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:13,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:13,270 INFO L87 Difference]: Start difference. First operand 9322 states and 13831 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:14,338 INFO L93 Difference]: Finished difference Result 14158 states and 20463 transitions. [2024-11-09 07:05:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 07:05:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:14,384 INFO L225 Difference]: With dead ends: 14158 [2024-11-09 07:05:14,384 INFO L226 Difference]: Without dead ends: 10036 [2024-11-09 07:05:14,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:14,399 INFO L432 NwaCegarLoop]: 3190 mSDtfsCounter, 3391 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3391 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:14,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3391 Valid, 3219 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:05:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10036 states. [2024-11-09 07:05:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10036 to 10036. [2024-11-09 07:05:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 8940 states have (on average 1.4951901565995527) internal successors, (13367), 8958 states have internal predecessors, (13367), 629 states have call successors, (629), 465 states have call predecessors, (629), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2024-11-09 07:05:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 14625 transitions. [2024-11-09 07:05:15,135 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 14625 transitions. Word has length 123 [2024-11-09 07:05:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:15,136 INFO L471 AbstractCegarLoop]: Abstraction has 10036 states and 14625 transitions. [2024-11-09 07:05:15,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 14625 transitions. [2024-11-09 07:05:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:15,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:15,164 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:15,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:15,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 07:05:15,365 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:15,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1759452069, now seen corresponding path program 2 times [2024-11-09 07:05:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241454332] [2024-11-09 07:05:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:15,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241454332] [2024-11-09 07:05:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241454332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129815164] [2024-11-09 07:05:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:05:15,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:15,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:15,730 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:05:15,937 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:05:15,937 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:05:15,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:05:15,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 07:05:16,323 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:16,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129815164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:16,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 07:05:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222624672] [2024-11-09 07:05:16,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:16,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:05:16,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:16,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:05:16,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:05:16,327 INFO L87 Difference]: Start difference. First operand 10036 states and 14625 transitions. Second operand has 6 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:05:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:18,215 INFO L93 Difference]: Finished difference Result 15729 states and 22375 transitions. [2024-11-09 07:05:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2024-11-09 07:05:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:18,259 INFO L225 Difference]: With dead ends: 15729 [2024-11-09 07:05:18,259 INFO L226 Difference]: Without dead ends: 10546 [2024-11-09 07:05:18,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:18,275 INFO L432 NwaCegarLoop]: 3132 mSDtfsCounter, 3508 mSDsluCounter, 6225 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 9357 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:18,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 9357 Invalid, 953 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:05:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2024-11-09 07:05:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 10398. [2024-11-09 07:05:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10398 states, 9258 states have (on average 1.48250162022035) internal successors, (13725), 9276 states have internal predecessors, (13725), 643 states have call successors, (643), 495 states have call predecessors, (643), 495 states have return successors, (643), 627 states have call predecessors, (643), 643 states have call successors, (643) [2024-11-09 07:05:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10398 states to 10398 states and 15011 transitions. [2024-11-09 07:05:18,739 INFO L78 Accepts]: Start accepts. Automaton has 10398 states and 15011 transitions. Word has length 123 [2024-11-09 07:05:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:18,740 INFO L471 AbstractCegarLoop]: Abstraction has 10398 states and 15011 transitions. [2024-11-09 07:05:18,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:05:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 10398 states and 15011 transitions. [2024-11-09 07:05:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:18,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:18,761 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:18,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:05:18,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:05:18,966 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:18,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2146707593, now seen corresponding path program 2 times [2024-11-09 07:05:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88474219] [2024-11-09 07:05:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:19,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:19,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88474219] [2024-11-09 07:05:19,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88474219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940907664] [2024-11-09 07:05:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:05:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:19,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:19,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:05:19,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:05:19,368 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:05:19,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:05:19,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 07:05:19,414 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940907664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:19,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393268540] [2024-11-09 07:05:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:19,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:19,420 INFO L87 Difference]: Start difference. First operand 10398 states and 15011 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:20,591 INFO L93 Difference]: Finished difference Result 15994 states and 22717 transitions. [2024-11-09 07:05:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 07:05:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:20,644 INFO L225 Difference]: With dead ends: 15994 [2024-11-09 07:05:20,644 INFO L226 Difference]: Without dead ends: 10416 [2024-11-09 07:05:20,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:20,664 INFO L432 NwaCegarLoop]: 3272 mSDtfsCounter, 115 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 6438 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:20,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 6438 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10416 states. [2024-11-09 07:05:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10416 to 10268. [2024-11-09 07:05:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10268 states, 9128 states have (on average 1.4663672217353199) internal successors, (13385), 9146 states have internal predecessors, (13385), 643 states have call successors, (643), 495 states have call predecessors, (643), 495 states have return successors, (643), 627 states have call predecessors, (643), 643 states have call successors, (643) [2024-11-09 07:05:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10268 states to 10268 states and 14671 transitions. [2024-11-09 07:05:21,384 INFO L78 Accepts]: Start accepts. Automaton has 10268 states and 14671 transitions. Word has length 123 [2024-11-09 07:05:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:21,385 INFO L471 AbstractCegarLoop]: Abstraction has 10268 states and 14671 transitions. [2024-11-09 07:05:21,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10268 states and 14671 transitions. [2024-11-09 07:05:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:05:21,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:21,407 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:21,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:21,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 07:05:21,608 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:21,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash -473202519, now seen corresponding path program 1 times [2024-11-09 07:05:21,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929478806] [2024-11-09 07:05:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:21,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929478806] [2024-11-09 07:05:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929478806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489724447] [2024-11-09 07:05:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:21,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:21,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:05:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:22,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:05:22,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 07:05:22,108 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489724447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:22,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:22,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365743759] [2024-11-09 07:05:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:22,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:22,112 INFO L87 Difference]: Start difference. First operand 10268 states and 14671 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:23,319 INFO L93 Difference]: Finished difference Result 23183 states and 32018 transitions. [2024-11-09 07:05:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:23,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2024-11-09 07:05:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:23,375 INFO L225 Difference]: With dead ends: 23183 [2024-11-09 07:05:23,375 INFO L226 Difference]: Without dead ends: 14562 [2024-11-09 07:05:23,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:23,399 INFO L432 NwaCegarLoop]: 3189 mSDtfsCounter, 61 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6353 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:23,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6353 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:05:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14562 states. [2024-11-09 07:05:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14562 to 12085. [2024-11-09 07:05:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12085 states, 10779 states have (on average 1.457556359588088) internal successors, (15711), 10798 states have internal predecessors, (15711), 726 states have call successors, (726), 578 states have call predecessors, (726), 578 states have return successors, (726), 709 states have call predecessors, (726), 726 states have call successors, (726) [2024-11-09 07:05:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12085 states to 12085 states and 17163 transitions. [2024-11-09 07:05:24,125 INFO L78 Accepts]: Start accepts. Automaton has 12085 states and 17163 transitions. Word has length 123 [2024-11-09 07:05:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:24,125 INFO L471 AbstractCegarLoop]: Abstraction has 12085 states and 17163 transitions. [2024-11-09 07:05:24,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:05:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 12085 states and 17163 transitions. [2024-11-09 07:05:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 07:05:24,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:24,145 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:24,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:24,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 07:05:24,346 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:24,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -219537545, now seen corresponding path program 1 times [2024-11-09 07:05:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:24,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205213763] [2024-11-09 07:05:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 07:05:24,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:24,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205213763] [2024-11-09 07:05:24,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205213763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:24,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979854677] [2024-11-09 07:05:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:24,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:05:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:24,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:05:24,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:05:25,011 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:25,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979854677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:25,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:25,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 07:05:25,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071147773] [2024-11-09 07:05:25,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:25,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:05:25,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:05:25,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:05:25,014 INFO L87 Difference]: Start difference. First operand 12085 states and 17163 transitions. Second operand has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:05:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:26,329 INFO L93 Difference]: Finished difference Result 18925 states and 26366 transitions. [2024-11-09 07:05:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2024-11-09 07:05:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:26,376 INFO L225 Difference]: With dead ends: 18925 [2024-11-09 07:05:26,376 INFO L226 Difference]: Without dead ends: 12473 [2024-11-09 07:05:26,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:26,393 INFO L432 NwaCegarLoop]: 3132 mSDtfsCounter, 3477 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:26,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 6244 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:05:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12473 states. [2024-11-09 07:05:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12473 to 12441. [2024-11-09 07:05:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 11095 states have (on average 1.445245606128887) internal successors, (16035), 11114 states have internal predecessors, (16035), 738 states have call successors, (738), 606 states have call predecessors, (738), 606 states have return successors, (738), 721 states have call predecessors, (738), 738 states have call successors, (738) [2024-11-09 07:05:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 17511 transitions. [2024-11-09 07:05:27,237 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 17511 transitions. Word has length 125 [2024-11-09 07:05:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:27,238 INFO L471 AbstractCegarLoop]: Abstraction has 12441 states and 17511 transitions. [2024-11-09 07:05:27,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:05:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 17511 transitions. [2024-11-09 07:05:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 07:05:27,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:27,258 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:27,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 07:05:27,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:27,460 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:27,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash -773858546, now seen corresponding path program 1 times [2024-11-09 07:05:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330968916] [2024-11-09 07:05:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 07:05:27,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330968916] [2024-11-09 07:05:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330968916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:27,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623883135] [2024-11-09 07:05:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:27,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:27,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:05:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:28,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:05:28,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 07:05:28,229 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623883135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:28,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 07:05:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408612558] [2024-11-09 07:05:28,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:28,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:05:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:05:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:05:28,233 INFO L87 Difference]: Start difference. First operand 12441 states and 17511 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 07:05:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:30,072 INFO L93 Difference]: Finished difference Result 19932 states and 27304 transitions. [2024-11-09 07:05:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 129 [2024-11-09 07:05:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:30,125 INFO L225 Difference]: With dead ends: 19932 [2024-11-09 07:05:30,125 INFO L226 Difference]: Without dead ends: 14474 [2024-11-09 07:05:30,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:30,141 INFO L432 NwaCegarLoop]: 3241 mSDtfsCounter, 97 mSDsluCounter, 9512 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 12753 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:30,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 12753 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:05:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14474 states. [2024-11-09 07:05:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14474 to 13560. [2024-11-09 07:05:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13560 states, 11988 states have (on average 1.4276776776776776) internal successors, (17115), 12023 states have internal predecessors, (17115), 859 states have call successors, (859), 695 states have call predecessors, (859), 711 states have return successors, (891), 842 states have call predecessors, (891), 859 states have call successors, (891) [2024-11-09 07:05:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13560 states to 13560 states and 18865 transitions. [2024-11-09 07:05:31,063 INFO L78 Accepts]: Start accepts. Automaton has 13560 states and 18865 transitions. Word has length 129 [2024-11-09 07:05:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:31,064 INFO L471 AbstractCegarLoop]: Abstraction has 13560 states and 18865 transitions. [2024-11-09 07:05:31,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 07:05:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 13560 states and 18865 transitions. [2024-11-09 07:05:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-09 07:05:31,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:31,082 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:31,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 07:05:31,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:31,287 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:31,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1454766055, now seen corresponding path program 1 times [2024-11-09 07:05:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:31,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537066972] [2024-11-09 07:05:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 07:05:31,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537066972] [2024-11-09 07:05:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537066972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733348082] [2024-11-09 07:05:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:31,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:31,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:31,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:31,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:05:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:31,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 07:05:31,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:05:31,764 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733348082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 07:05:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732542892] [2024-11-09 07:05:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:31,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:05:31,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:05:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:05:31,770 INFO L87 Difference]: Start difference. First operand 13560 states and 18865 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 07:05:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:33,195 INFO L93 Difference]: Finished difference Result 23694 states and 32254 transitions. [2024-11-09 07:05:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 127 [2024-11-09 07:05:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:33,247 INFO L225 Difference]: With dead ends: 23694 [2024-11-09 07:05:33,247 INFO L226 Difference]: Without dead ends: 15024 [2024-11-09 07:05:33,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:33,268 INFO L432 NwaCegarLoop]: 3255 mSDtfsCounter, 110 mSDsluCounter, 6357 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 9612 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:33,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 9612 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:05:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15024 states. [2024-11-09 07:05:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15024 to 12820. [2024-11-09 07:05:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 11202 states have (on average 1.4190323156579183) internal successors, (15896), 11249 states have internal predecessors, (15896), 890 states have call successors, (890), 694 states have call predecessors, (890), 726 states have return successors, (954), 877 states have call predecessors, (954), 890 states have call successors, (954) [2024-11-09 07:05:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 17740 transitions. [2024-11-09 07:05:34,070 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 17740 transitions. Word has length 127 [2024-11-09 07:05:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:34,071 INFO L471 AbstractCegarLoop]: Abstraction has 12820 states and 17740 transitions. [2024-11-09 07:05:34,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 4 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-09 07:05:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 17740 transitions. [2024-11-09 07:05:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 07:05:34,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:34,087 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:34,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 07:05:34,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 07:05:34,287 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:34,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 946993463, now seen corresponding path program 1 times [2024-11-09 07:05:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970321941] [2024-11-09 07:05:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 07:05:34,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:34,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970321941] [2024-11-09 07:05:34,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970321941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:34,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644650509] [2024-11-09 07:05:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:34,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:34,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:34,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:05:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:34,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:05:34,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 07:05:34,937 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:34,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644650509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:34,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:34,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:34,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125151689] [2024-11-09 07:05:34,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:34,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:34,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:34,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:34,940 INFO L87 Difference]: Start difference. First operand 12820 states and 17740 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:36,091 INFO L93 Difference]: Finished difference Result 22718 states and 30687 transitions. [2024-11-09 07:05:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 159 [2024-11-09 07:05:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:36,136 INFO L225 Difference]: With dead ends: 22718 [2024-11-09 07:05:36,136 INFO L226 Difference]: Without dead ends: 13908 [2024-11-09 07:05:36,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:36,160 INFO L432 NwaCegarLoop]: 3193 mSDtfsCounter, 3360 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3360 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:36,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3360 Valid, 3227 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:05:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13908 states. [2024-11-09 07:05:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13908 to 13812. [2024-11-09 07:05:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 12122 states have (on average 1.3882197657152284) internal successors, (16828), 12169 states have internal predecessors, (16828), 902 states have call successors, (902), 754 states have call predecessors, (902), 786 states have return successors, (1022), 889 states have call predecessors, (1022), 902 states have call successors, (1022) [2024-11-09 07:05:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 18752 transitions. [2024-11-09 07:05:37,174 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 18752 transitions. Word has length 159 [2024-11-09 07:05:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:37,175 INFO L471 AbstractCegarLoop]: Abstraction has 13812 states and 18752 transitions. [2024-11-09 07:05:37,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:05:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 18752 transitions. [2024-11-09 07:05:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 07:05:37,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:37,195 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:37,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:37,396 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:37,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1693391610, now seen corresponding path program 1 times [2024-11-09 07:05:37,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:37,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231776136] [2024-11-09 07:05:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 07:05:37,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231776136] [2024-11-09 07:05:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231776136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:37,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993283702] [2024-11-09 07:05:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:37,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:37,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:37,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:05:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:37,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:05:37,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-09 07:05:37,954 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993283702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:37,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:37,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131973624] [2024-11-09 07:05:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:37,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:37,957 INFO L87 Difference]: Start difference. First operand 13812 states and 18752 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 07:05:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:39,150 INFO L93 Difference]: Finished difference Result 23188 states and 31109 transitions. [2024-11-09 07:05:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 159 [2024-11-09 07:05:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:39,189 INFO L225 Difference]: With dead ends: 23188 [2024-11-09 07:05:39,190 INFO L226 Difference]: Without dead ends: 13702 [2024-11-09 07:05:39,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:39,209 INFO L432 NwaCegarLoop]: 3267 mSDtfsCounter, 102 mSDsluCounter, 3155 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:39,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6422 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:05:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13702 states. [2024-11-09 07:05:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13702 to 13516. [2024-11-09 07:05:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13516 states, 11826 states have (on average 1.366987992558769) internal successors, (16166), 11873 states have internal predecessors, (16166), 902 states have call successors, (902), 754 states have call predecessors, (902), 786 states have return successors, (1022), 889 states have call predecessors, (1022), 902 states have call successors, (1022) [2024-11-09 07:05:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13516 states to 13516 states and 18090 transitions. [2024-11-09 07:05:39,952 INFO L78 Accepts]: Start accepts. Automaton has 13516 states and 18090 transitions. Word has length 159 [2024-11-09 07:05:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:39,953 INFO L471 AbstractCegarLoop]: Abstraction has 13516 states and 18090 transitions. [2024-11-09 07:05:39,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 07:05:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 13516 states and 18090 transitions. [2024-11-09 07:05:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 07:05:39,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:39,966 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 07:05:39,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:40,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:40,167 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:40,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1802546204, now seen corresponding path program 1 times [2024-11-09 07:05:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:40,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809804602] [2024-11-09 07:05:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 07:05:40,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:40,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809804602] [2024-11-09 07:05:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809804602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:40,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002173757] [2024-11-09 07:05:40,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:40,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:40,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:40,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:40,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:05:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:40,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 07:05:40,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 07:05:40,782 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002173757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:40,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 07:05:40,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404095304] [2024-11-09 07:05:40,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:40,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:05:40,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:40,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:05:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:05:40,785 INFO L87 Difference]: Start difference. First operand 13516 states and 18090 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 07:05:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:42,741 INFO L93 Difference]: Finished difference Result 28089 states and 36316 transitions. [2024-11-09 07:05:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:42,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 162 [2024-11-09 07:05:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:42,790 INFO L225 Difference]: With dead ends: 28089 [2024-11-09 07:05:42,791 INFO L226 Difference]: Without dead ends: 18975 [2024-11-09 07:05:42,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:42,806 INFO L432 NwaCegarLoop]: 3250 mSDtfsCounter, 105 mSDsluCounter, 6359 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 9609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:42,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 9609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 07:05:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18975 states. [2024-11-09 07:05:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18975 to 16904. [2024-11-09 07:05:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16904 states, 14566 states have (on average 1.3222573115474392) internal successors, (19260), 14605 states have internal predecessors, (19260), 1286 states have call successors, (1286), 1042 states have call predecessors, (1286), 1050 states have return successors, (1494), 1257 states have call predecessors, (1494), 1286 states have call successors, (1494) [2024-11-09 07:05:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16904 states to 16904 states and 22040 transitions. [2024-11-09 07:05:43,915 INFO L78 Accepts]: Start accepts. Automaton has 16904 states and 22040 transitions. Word has length 162 [2024-11-09 07:05:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:43,916 INFO L471 AbstractCegarLoop]: Abstraction has 16904 states and 22040 transitions. [2024-11-09 07:05:43,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 07:05:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 16904 states and 22040 transitions. [2024-11-09 07:05:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 07:05:43,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:43,937 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:43,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 07:05:44,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 07:05:44,138 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:44,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash -660229560, now seen corresponding path program 1 times [2024-11-09 07:05:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:44,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147155668] [2024-11-09 07:05:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 07:05:44,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147155668] [2024-11-09 07:05:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147155668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414162398] [2024-11-09 07:05:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:44,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:44,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:05:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:44,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:05:44,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 07:05:44,761 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414162398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:44,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:44,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736267625] [2024-11-09 07:05:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:44,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:44,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:44,764 INFO L87 Difference]: Start difference. First operand 16904 states and 22040 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 07:05:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:46,299 INFO L93 Difference]: Finished difference Result 27540 states and 35451 transitions. [2024-11-09 07:05:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 195 [2024-11-09 07:05:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:46,358 INFO L225 Difference]: With dead ends: 27540 [2024-11-09 07:05:46,358 INFO L226 Difference]: Without dead ends: 18784 [2024-11-09 07:05:46,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:46,376 INFO L432 NwaCegarLoop]: 3194 mSDtfsCounter, 3359 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:46,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:05:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18784 states. [2024-11-09 07:05:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18784 to 18676. [2024-11-09 07:05:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18676 states, 16226 states have (on average 1.2902748674966105) internal successors, (20936), 16281 states have internal predecessors, (20936), 1286 states have call successors, (1286), 1122 states have call predecessors, (1286), 1162 states have return successors, (1602), 1273 states have call predecessors, (1602), 1286 states have call successors, (1602) [2024-11-09 07:05:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18676 states to 18676 states and 23824 transitions. [2024-11-09 07:05:47,836 INFO L78 Accepts]: Start accepts. Automaton has 18676 states and 23824 transitions. Word has length 195 [2024-11-09 07:05:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:47,836 INFO L471 AbstractCegarLoop]: Abstraction has 18676 states and 23824 transitions. [2024-11-09 07:05:47,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-09 07:05:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18676 states and 23824 transitions. [2024-11-09 07:05:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-09 07:05:47,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:47,852 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:47,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:48,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:05:48,053 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:48,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1495320870, now seen corresponding path program 1 times [2024-11-09 07:05:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:48,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263981755] [2024-11-09 07:05:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-09 07:05:48,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263981755] [2024-11-09 07:05:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263981755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571466511] [2024-11-09 07:05:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:48,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:48,341 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:48,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:05:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:48,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:05:48,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 07:05:48,652 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:48,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571466511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:48,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:48,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:05:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73673062] [2024-11-09 07:05:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:48,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:05:48,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:05:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:48,655 INFO L87 Difference]: Start difference. First operand 18676 states and 23824 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 07:05:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:50,105 INFO L93 Difference]: Finished difference Result 28676 states and 36570 transitions. [2024-11-09 07:05:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:05:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 195 [2024-11-09 07:05:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:50,159 INFO L225 Difference]: With dead ends: 28676 [2024-11-09 07:05:50,160 INFO L226 Difference]: Without dead ends: 18658 [2024-11-09 07:05:50,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:05:50,179 INFO L432 NwaCegarLoop]: 3265 mSDtfsCounter, 100 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:50,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6431 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:05:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18658 states. [2024-11-09 07:05:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18658 to 18504. [2024-11-09 07:05:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18504 states, 16054 states have (on average 1.2692163946679955) internal successors, (20376), 16109 states have internal predecessors, (20376), 1286 states have call successors, (1286), 1122 states have call predecessors, (1286), 1162 states have return successors, (1602), 1273 states have call predecessors, (1602), 1286 states have call successors, (1602) [2024-11-09 07:05:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18504 states to 18504 states and 23264 transitions. [2024-11-09 07:05:51,943 INFO L78 Accepts]: Start accepts. Automaton has 18504 states and 23264 transitions. Word has length 195 [2024-11-09 07:05:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:51,943 INFO L471 AbstractCegarLoop]: Abstraction has 18504 states and 23264 transitions. [2024-11-09 07:05:51,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-09 07:05:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 18504 states and 23264 transitions. [2024-11-09 07:05:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-09 07:05:51,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:51,965 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:51,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:52,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:05:52,166 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:52,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -126960856, now seen corresponding path program 1 times [2024-11-09 07:05:52,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321318070] [2024-11-09 07:05:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-11-09 07:05:52,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321318070] [2024-11-09 07:05:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321318070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955251590] [2024-11-09 07:05:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:52,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:52,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:52,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:05:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:52,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 07:05:52,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 07:05:52,827 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955251590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:52,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:52,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 07:05:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289477448] [2024-11-09 07:05:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:52,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:05:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:05:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:05:52,830 INFO L87 Difference]: Start difference. First operand 18504 states and 23264 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 07:05:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:05:55,182 INFO L93 Difference]: Finished difference Result 34733 states and 42621 transitions. [2024-11-09 07:05:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:05:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 199 [2024-11-09 07:05:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:05:55,240 INFO L225 Difference]: With dead ends: 34733 [2024-11-09 07:05:55,240 INFO L226 Difference]: Without dead ends: 24999 [2024-11-09 07:05:55,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:05:55,256 INFO L432 NwaCegarLoop]: 3247 mSDtfsCounter, 102 mSDsluCounter, 6363 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 9610 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:05:55,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 9610 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:05:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24999 states. [2024-11-09 07:05:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24999 to 23356. [2024-11-09 07:05:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23356 states, 20070 states have (on average 1.2326856003986049) internal successors, (24740), 20123 states have internal predecessors, (24740), 1750 states have call successors, (1750), 1506 states have call predecessors, (1750), 1534 states have return successors, (2254), 1727 states have call predecessors, (2254), 1750 states have call successors, (2254) [2024-11-09 07:05:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23356 states to 23356 states and 28744 transitions. [2024-11-09 07:05:57,050 INFO L78 Accepts]: Start accepts. Automaton has 23356 states and 28744 transitions. Word has length 199 [2024-11-09 07:05:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:05:57,050 INFO L471 AbstractCegarLoop]: Abstraction has 23356 states and 28744 transitions. [2024-11-09 07:05:57,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-09 07:05:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23356 states and 28744 transitions. [2024-11-09 07:05:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-09 07:05:57,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:05:57,071 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:05:57,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 07:05:57,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 07:05:57,272 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:05:57,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:05:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1983484692, now seen corresponding path program 1 times [2024-11-09 07:05:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:05:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795665064] [2024-11-09 07:05:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:05:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 18 proven. 102 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-09 07:05:57,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:05:57,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795665064] [2024-11-09 07:05:57,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795665064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:05:57,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486936300] [2024-11-09 07:05:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:05:57,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:05:57,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:05:57,796 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:05:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:05:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:05:58,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 07:05:58,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:05:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-09 07:05:58,371 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:05:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486936300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:05:58,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:05:58,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 07:05:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510878093] [2024-11-09 07:05:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:05:58,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:05:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:05:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:05:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:05:58,374 INFO L87 Difference]: Start difference. First operand 23356 states and 28744 transitions. Second operand has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-09 07:06:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:06:00,866 INFO L93 Difference]: Finished difference Result 36827 states and 44528 transitions. [2024-11-09 07:06:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:06:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 207 [2024-11-09 07:06:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:06:00,910 INFO L225 Difference]: With dead ends: 36827 [2024-11-09 07:06:00,911 INFO L226 Difference]: Without dead ends: 18903 [2024-11-09 07:06:00,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:06:00,928 INFO L432 NwaCegarLoop]: 3132 mSDtfsCounter, 3471 mSDsluCounter, 9334 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 12466 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:06:00,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 12466 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:06:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18903 states. [2024-11-09 07:06:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18903 to 18205. [2024-11-09 07:06:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18205 states, 15587 states have (on average 1.2484121383203952) internal successors, (19459), 15654 states have internal predecessors, (19459), 1392 states have call successors, (1392), 1160 states have call predecessors, (1392), 1224 states have return successors, (1696), 1391 states have call predecessors, (1696), 1392 states have call successors, (1696) [2024-11-09 07:06:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18205 states to 18205 states and 22547 transitions. [2024-11-09 07:06:02,139 INFO L78 Accepts]: Start accepts. Automaton has 18205 states and 22547 transitions. Word has length 207 [2024-11-09 07:06:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:06:02,139 INFO L471 AbstractCegarLoop]: Abstraction has 18205 states and 22547 transitions. [2024-11-09 07:06:02,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-09 07:06:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18205 states and 22547 transitions. [2024-11-09 07:06:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-09 07:06:02,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:06:02,154 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:06:02,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 07:06:02,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 07:06:02,362 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:06:02,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:06:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1773923093, now seen corresponding path program 1 times [2024-11-09 07:06:02,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:06:02,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042958064] [2024-11-09 07:06:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:06:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:06:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:06:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-09 07:06:02,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:06:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042958064] [2024-11-09 07:06:02,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042958064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:06:02,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:06:02,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 07:06:02,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412680522] [2024-11-09 07:06:02,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:06:02,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:06:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:06:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:06:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:06:02,695 INFO L87 Difference]: Start difference. First operand 18205 states and 22547 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 07:06:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:06:11,132 INFO L93 Difference]: Finished difference Result 81140 states and 96565 transitions. [2024-11-09 07:06:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:06:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 237 [2024-11-09 07:06:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:06:11,310 INFO L225 Difference]: With dead ends: 81140 [2024-11-09 07:06:11,310 INFO L226 Difference]: Without dead ends: 75352 [2024-11-09 07:06:11,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:06:11,335 INFO L432 NwaCegarLoop]: 3581 mSDtfsCounter, 3837 mSDsluCounter, 13799 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3837 SdHoareTripleChecker+Valid, 17380 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:06:11,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3837 Valid, 17380 Invalid, 2174 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 07:06:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75352 states. [2024-11-09 07:06:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75352 to 49334. [2024-11-09 07:06:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49334 states, 41751 states have (on average 1.204450192809753) internal successors, (50287), 41948 states have internal predecessors, (50287), 4036 states have call successors, (4036), 3326 states have call predecessors, (4036), 3545 states have return successors, (4956), 4060 states have call predecessors, (4956), 4036 states have call successors, (4956) [2024-11-09 07:06:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49334 states to 49334 states and 59279 transitions. [2024-11-09 07:06:17,147 INFO L78 Accepts]: Start accepts. Automaton has 49334 states and 59279 transitions. Word has length 237 [2024-11-09 07:06:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:06:17,148 INFO L471 AbstractCegarLoop]: Abstraction has 49334 states and 59279 transitions. [2024-11-09 07:06:17,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 07:06:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49334 states and 59279 transitions. [2024-11-09 07:06:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-11-09 07:06:17,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:06:17,190 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:06:17,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-09 07:06:17,190 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:06:17,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:06:17,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1999072779, now seen corresponding path program 1 times [2024-11-09 07:06:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:06:17,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269110452] [2024-11-09 07:06:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:06:17,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:06:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:06:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 18 proven. 137 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-09 07:06:18,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:06:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269110452] [2024-11-09 07:06:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269110452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:06:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206123220] [2024-11-09 07:06:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:06:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:06:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:06:18,160 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:06:18,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 07:06:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:06:18,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 07:06:18,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:06:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-09 07:06:18,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:06:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 44 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 07:06:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206123220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:06:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057663090] [2024-11-09 07:06:19,320 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2024-11-09 07:06:19,320 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:06:19,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:06:19,332 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:06:19,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:06:39,790 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 160 for LOIs [2024-11-09 07:06:39,911 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 151 for LOIs [2024-11-09 07:06:39,996 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2024-11-09 07:06:39,997 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2024-11-09 07:06:40,006 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 1 for LOIs [2024-11-09 07:06:40,035 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-09 07:06:40,187 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:06:51,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '997291#(and (not (= ~token~0 (+ ~local~0 4))) (= ~m_pc~0 1) (= ~m_st~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_19| Int)) (and (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_19| 0)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_19| 2147483648)))))' at error location [2024-11-09 07:06:51,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:06:51,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:06:51,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 21 [2024-11-09 07:06:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864023615] [2024-11-09 07:06:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:06:51,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:06:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:06:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:06:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=6441, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 07:06:51,909 INFO L87 Difference]: Start difference. First operand 49334 states and 59279 transitions. Second operand has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2024-11-09 07:07:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:07:01,829 INFO L93 Difference]: Finished difference Result 96440 states and 114217 transitions. [2024-11-09 07:07:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 07:07:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 244 [2024-11-09 07:07:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:07:01,944 INFO L225 Difference]: With dead ends: 96440 [2024-11-09 07:07:01,944 INFO L226 Difference]: Without dead ends: 48753 [2024-11-09 07:07:02,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 641 SyntacticMatches, 35 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1129, Invalid=12913, Unknown=0, NotChecked=0, Total=14042 [2024-11-09 07:07:02,000 INFO L432 NwaCegarLoop]: 3149 mSDtfsCounter, 11576 mSDsluCounter, 25028 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11576 SdHoareTripleChecker+Valid, 28177 SdHoareTripleChecker+Invalid, 3826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:07:02,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11576 Valid, 28177 Invalid, 3826 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 3378 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-09 07:07:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48753 states. [2024-11-09 07:07:06,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48753 to 37966. [2024-11-09 07:07:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37966 states, 31816 states have (on average 1.197699270807141) internal successors, (38106), 32051 states have internal predecessors, (38106), 3375 states have call successors, (3375), 2617 states have call predecessors, (3375), 2773 states have return successors, (3619), 3298 states have call predecessors, (3619), 3375 states have call successors, (3619) [2024-11-09 07:07:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37966 states to 37966 states and 45100 transitions. [2024-11-09 07:07:06,545 INFO L78 Accepts]: Start accepts. Automaton has 37966 states and 45100 transitions. Word has length 244 [2024-11-09 07:07:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:07:06,546 INFO L471 AbstractCegarLoop]: Abstraction has 37966 states and 45100 transitions. [2024-11-09 07:07:06,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 16.866666666666667) internal successors, (253), 17 states have internal predecessors, (253), 11 states have call successors, (46), 8 states have call predecessors, (46), 12 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2024-11-09 07:07:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 37966 states and 45100 transitions. [2024-11-09 07:07:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-11-09 07:07:06,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:07:06,575 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:07:06,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 07:07:06,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 07:07:06,775 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:07:06,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:07:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -227438232, now seen corresponding path program 1 times [2024-11-09 07:07:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:07:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342909485] [2024-11-09 07:07:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:07:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:07:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:07:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 42 proven. 96 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-09 07:07:07,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:07:07,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342909485] [2024-11-09 07:07:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342909485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:07:07,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004681906] [2024-11-09 07:07:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:07:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:07:07,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:07:07,116 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:07:07,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fba78e72-6b37-4df0-9049-60a55dc01f65/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 07:07:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:07:07,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:07:07,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:07:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 07:07:07,431 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:07:07,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004681906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:07:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:07:07,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 07:07:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59479487] [2024-11-09 07:07:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:07:07,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:07:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:07:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:07:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:07:07,435 INFO L87 Difference]: Start difference. First operand 37966 states and 45100 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 07:07:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:07:13,269 INFO L93 Difference]: Finished difference Result 79809 states and 93246 transitions. [2024-11-09 07:07:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:07:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 276 [2024-11-09 07:07:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:07:13,419 INFO L225 Difference]: With dead ends: 79809 [2024-11-09 07:07:13,419 INFO L226 Difference]: Without dead ends: 43490 [2024-11-09 07:07:13,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:07:13,470 INFO L432 NwaCegarLoop]: 3270 mSDtfsCounter, 3377 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3377 SdHoareTripleChecker+Valid, 6651 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:07:13,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3377 Valid, 6651 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:07:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43490 states.