./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.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_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/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_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/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_10510302-3b26-46cb-932b-52f8a59061a7/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 5c885e36ce67f972719c7330e2fdf8e1794f0d30dd144b261109fa7b0892a972 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:28:07,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:28:07,675 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:28:07,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:28:07,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:28:07,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:28:07,737 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:28:07,738 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:28:07,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:28:07,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:28:07,741 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:28:07,741 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:28:07,742 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:28:07,742 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:28:07,745 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:28:07,745 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:28:07,746 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:28:07,746 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:28:07,746 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:28:07,747 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:28:07,747 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:28:07,752 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:28:07,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:28:07,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:28:07,754 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:28:07,755 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:28:07,755 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:28:07,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:28:07,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:28:07,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:28:07,756 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:28:07,757 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:28:07,757 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:28:07,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:28:07,758 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:28:07,758 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:28:07,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:28:07,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:28:07,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:28:07,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:28:07,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:28:07,762 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:28:07,762 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:28:07,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:28:07,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:28:07,764 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:28:07,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:28:07,764 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_10510302-3b26-46cb-932b-52f8a59061a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c885e36ce67f972719c7330e2fdf8e1794f0d30dd144b261109fa7b0892a972 [2024-11-09 05:28:08,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:28:08,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:28:08,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:28:08,143 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:28:08,144 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:28:08,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c Unable to find full path for "g++" [2024-11-09 05:28:10,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:28:11,405 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:28:11,406 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c [2024-11-09 05:28:11,472 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/data/ef66bf1a4/0e25f90ebb024554ab9d06bc9d70d20d/FLAG68eae5d4a [2024-11-09 05:28:11,546 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/data/ef66bf1a4/0e25f90ebb024554ab9d06bc9d70d20d [2024-11-09 05:28:11,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:28:11,553 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:28:11,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:28:11,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:28:11,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:28:11,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:28:11" (1/1) ... [2024-11-09 05:28:11,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ed0f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:11, skipping insertion in model container [2024-11-09 05:28:11,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:28:11" (1/1) ... [2024-11-09 05:28:11,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:28:14,543 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_10510302-3b26-46cb-932b-52f8a59061a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[380323,380336] [2024-11-09 05:28:14,612 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_10510302-3b26-46cb-932b-52f8a59061a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[383339,383352] [2024-11-09 05:28:15,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:28:15,132 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:28:16,621 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_10510302-3b26-46cb-932b-52f8a59061a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[380323,380336] [2024-11-09 05:28:16,630 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_10510302-3b26-46cb-932b-52f8a59061a7/sv-benchmarks/c/combinations/Problem05_label45+token_ring.14.cil.c[383339,383352] [2024-11-09 05:28:16,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:28:16,835 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:28:16,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16 WrapperNode [2024-11-09 05:28:16,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:28:16,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:28:16,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:28:16,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:28:16,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:16,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:17,537 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13221 [2024-11-09 05:28:17,539 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:28:17,540 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:28:17,540 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:28:17,540 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:28:17,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:17,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:17,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:17,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:28:18,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:28:18,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:28:18,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:28:18,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (1/1) ... [2024-11-09 05:28:18,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:28:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:18,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:28:18,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:28:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:28:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 05:28:18,478 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 05:28:18,478 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:28:18,478 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:28:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 05:28:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 05:28:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 05:28:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 05:28:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 05:28:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 05:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 05:28:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 05:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 05:28:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 05:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:28:18,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:28:18,764 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:28:18,767 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:28:31,290 INFO L? ?]: Removed 1759 outVars from TransFormulas that were not future-live. [2024-11-09 05:28:31,290 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:28:34,875 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:28:34,875 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-09 05:28:34,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:34 BoogieIcfgContainer [2024-11-09 05:28:34,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:28:34,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:28:34,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:28:34,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:28:34,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:28:11" (1/3) ... [2024-11-09 05:28:34,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a7b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:34, skipping insertion in model container [2024-11-09 05:28:34,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:28:16" (2/3) ... [2024-11-09 05:28:34,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772a7b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:28:34, skipping insertion in model container [2024-11-09 05:28:34,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:28:34" (3/3) ... [2024-11-09 05:28:34,890 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.14.cil.c [2024-11-09 05:28:34,916 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:28:34,917 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:28:35,065 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:28:35,075 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;@40bc79c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:28:35,075 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:28:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-09 05:28:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 05:28:35,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:35,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:35,105 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:35,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -367260305, now seen corresponding path program 1 times [2024-11-09 05:28:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502513010] [2024-11-09 05:28:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:35,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:28:35,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502513010] [2024-11-09 05:28:35,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502513010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:35,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:35,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:28:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111987062] [2024-11-09 05:28:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:35,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:28:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:35,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:28:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:28:35,912 INFO L87 Difference]: Start difference. First operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:28:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:37,412 INFO L93 Difference]: Finished difference Result 3883 states and 7486 transitions. [2024-11-09 05:28:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:28:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-11-09 05:28:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:37,454 INFO L225 Difference]: With dead ends: 3883 [2024-11-09 05:28:37,454 INFO L226 Difference]: Without dead ends: 2032 [2024-11-09 05:28:37,470 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 05:28:37,476 INFO L432 NwaCegarLoop]: 3545 mSDtfsCounter, 3813 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 6990 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:37,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3813 Valid, 6990 Invalid, 742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:28:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2024-11-09 05:28:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2031. [2024-11-09 05:28:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1967 states have (on average 1.907473309608541) internal successors, (3752), 1971 states have internal predecessors, (3752), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 05:28:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3850 transitions. [2024-11-09 05:28:37,683 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3850 transitions. Word has length 68 [2024-11-09 05:28:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:37,685 INFO L471 AbstractCegarLoop]: Abstraction has 2031 states and 3850 transitions. [2024-11-09 05:28:37,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:28:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3850 transitions. [2024-11-09 05:28:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:37,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:37,702 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:37,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:28:37,704 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:37,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1580081524, now seen corresponding path program 1 times [2024-11-09 05:28:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:37,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632893040] [2024-11-09 05:28:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:38,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632893040] [2024-11-09 05:28:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632893040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197322740] [2024-11-09 05:28:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:38,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:38,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:38,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:28:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:38,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:38,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:28:38,892 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197322740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:38,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:38,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723742132] [2024-11-09 05:28:38,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:38,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:38,899 INFO L87 Difference]: Start difference. First operand 2031 states and 3850 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:39,704 INFO L93 Difference]: Finished difference Result 2794 states and 5017 transitions. [2024-11-09 05:28:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:39,722 INFO L225 Difference]: With dead ends: 2794 [2024-11-09 05:28:39,722 INFO L226 Difference]: Without dead ends: 2409 [2024-11-09 05:28:39,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:39,727 INFO L432 NwaCegarLoop]: 3371 mSDtfsCounter, 3528 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3617 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:39,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3617 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:28:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2024-11-09 05:28:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2403. [2024-11-09 05:28:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2285 states have (on average 1.8472647702407001) internal successors, (4221), 2290 states have internal predecessors, (4221), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-09 05:28:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4403 transitions. [2024-11-09 05:28:39,846 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4403 transitions. Word has length 138 [2024-11-09 05:28:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:39,848 INFO L471 AbstractCegarLoop]: Abstraction has 2403 states and 4403 transitions. [2024-11-09 05:28:39,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4403 transitions. [2024-11-09 05:28:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:39,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:39,855 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:39,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:40,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:40,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:40,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -684608084, now seen corresponding path program 1 times [2024-11-09 05:28:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873987678] [2024-11-09 05:28:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:40,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873987678] [2024-11-09 05:28:40,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873987678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307852819] [2024-11-09 05:28:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:40,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:40,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:40,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:28:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:40,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:40,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 05:28:40,828 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307852819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:40,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:40,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:40,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947834830] [2024-11-09 05:28:40,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:40,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:40,833 INFO L87 Difference]: Start difference. First operand 2403 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:41,594 INFO L93 Difference]: Finished difference Result 3904 states and 6694 transitions. [2024-11-09 05:28:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:41,615 INFO L225 Difference]: With dead ends: 3904 [2024-11-09 05:28:41,616 INFO L226 Difference]: Without dead ends: 3147 [2024-11-09 05:28:41,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:41,623 INFO L432 NwaCegarLoop]: 3351 mSDtfsCounter, 3546 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:41,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3597 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2024-11-09 05:28:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3139. [2024-11-09 05:28:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2915 states have (on average 1.7656946826758146) internal successors, (5147), 2922 states have internal predecessors, (5147), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2024-11-09 05:28:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5493 transitions. [2024-11-09 05:28:41,781 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5493 transitions. Word has length 138 [2024-11-09 05:28:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:41,782 INFO L471 AbstractCegarLoop]: Abstraction has 3139 states and 5493 transitions. [2024-11-09 05:28:41,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5493 transitions. [2024-11-09 05:28:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:41,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:41,790 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:41,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:28:41,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:41,994 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:41,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:41,995 INFO L85 PathProgramCache]: Analyzing trace with hash -533330740, now seen corresponding path program 1 times [2024-11-09 05:28:41,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053087869] [2024-11-09 05:28:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:42,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053087869] [2024-11-09 05:28:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053087869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224560014] [2024-11-09 05:28:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:42,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:42,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:28:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:42,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:42,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:28:42,713 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224560014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:42,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:42,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375017047] [2024-11-09 05:28:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:42,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:42,718 INFO L87 Difference]: Start difference. First operand 3139 states and 5493 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:43,525 INFO L93 Difference]: Finished difference Result 6100 states and 9998 transitions. [2024-11-09 05:28:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:43,559 INFO L225 Difference]: With dead ends: 6100 [2024-11-09 05:28:43,559 INFO L226 Difference]: Without dead ends: 4607 [2024-11-09 05:28:43,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:43,570 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3540 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3540 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:43,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3540 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2024-11-09 05:28:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4595. [2024-11-09 05:28:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4163 states have (on average 1.675474417487389) internal successors, (6975), 4174 states have internal predecessors, (6975), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2024-11-09 05:28:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7641 transitions. [2024-11-09 05:28:43,849 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7641 transitions. Word has length 138 [2024-11-09 05:28:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:43,850 INFO L471 AbstractCegarLoop]: Abstraction has 4595 states and 7641 transitions. [2024-11-09 05:28:43,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7641 transitions. [2024-11-09 05:28:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:43,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:43,862 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:43,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:28:44,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:44,067 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:44,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash -638833684, now seen corresponding path program 1 times [2024-11-09 05:28:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:44,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367424179] [2024-11-09 05:28:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:44,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:44,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367424179] [2024-11-09 05:28:44,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367424179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:44,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800572032] [2024-11-09 05:28:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:44,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:44,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:44,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:28:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:44,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:44,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 05:28:44,911 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:44,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800572032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:44,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:44,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:44,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523576047] [2024-11-09 05:28:44,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:44,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:44,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:44,916 INFO L87 Difference]: Start difference. First operand 4595 states and 7641 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:45,735 INFO L93 Difference]: Finished difference Result 10444 states and 16506 transitions. [2024-11-09 05:28:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:45,778 INFO L225 Difference]: With dead ends: 10444 [2024-11-09 05:28:45,779 INFO L226 Difference]: Without dead ends: 7495 [2024-11-09 05:28:45,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:45,798 INFO L432 NwaCegarLoop]: 3365 mSDtfsCounter, 3549 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3549 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:45,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3549 Valid, 3611 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2024-11-09 05:28:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 7475. [2024-11-09 05:28:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 6635 states have (on average 1.5950263752825924) internal successors, (10583), 6654 states have internal predecessors, (10583), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-09 05:28:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 11873 transitions. [2024-11-09 05:28:46,150 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 11873 transitions. Word has length 138 [2024-11-09 05:28:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:46,151 INFO L471 AbstractCegarLoop]: Abstraction has 7475 states and 11873 transitions. [2024-11-09 05:28:46,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 11873 transitions. [2024-11-09 05:28:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:46,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:46,166 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:46,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:46,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:46,367 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:46,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 643827916, now seen corresponding path program 1 times [2024-11-09 05:28:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:46,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583129553] [2024-11-09 05:28:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:46,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583129553] [2024-11-09 05:28:46,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583129553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:46,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256124659] [2024-11-09 05:28:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:46,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:46,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:46,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:28:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:46,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:46,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:28:47,025 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256124659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273055446] [2024-11-09 05:28:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:47,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:47,029 INFO L87 Difference]: Start difference. First operand 7475 states and 11873 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:47,986 INFO L93 Difference]: Finished difference Result 19036 states and 29322 transitions. [2024-11-09 05:28:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:47,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:48,096 INFO L225 Difference]: With dead ends: 19036 [2024-11-09 05:28:48,096 INFO L226 Difference]: Without dead ends: 13207 [2024-11-09 05:28:48,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:48,123 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:48,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13207 states. [2024-11-09 05:28:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13207 to 13171. [2024-11-09 05:28:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 11531 states have (on average 1.535252796808603) internal successors, (17703), 11566 states have internal predecessors, (17703), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2024-11-09 05:28:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 20209 transitions. [2024-11-09 05:28:48,793 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 20209 transitions. Word has length 138 [2024-11-09 05:28:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:48,793 INFO L471 AbstractCegarLoop]: Abstraction has 13171 states and 20209 transitions. [2024-11-09 05:28:48,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 20209 transitions. [2024-11-09 05:28:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:48,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:48,815 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:48,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:28:49,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:28:49,016 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:49,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2145669716, now seen corresponding path program 1 times [2024-11-09 05:28:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066283864] [2024-11-09 05:28:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:49,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066283864] [2024-11-09 05:28:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066283864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727129286] [2024-11-09 05:28:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:49,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:49,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:28:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:49,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:49,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:28:49,558 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727129286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:49,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:49,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:49,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57246755] [2024-11-09 05:28:49,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:49,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:49,561 INFO L87 Difference]: Start difference. First operand 13171 states and 20209 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:50,617 INFO L93 Difference]: Finished difference Result 36028 states and 54554 transitions. [2024-11-09 05:28:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:50,737 INFO L225 Difference]: With dead ends: 36028 [2024-11-09 05:28:50,738 INFO L226 Difference]: Without dead ends: 24503 [2024-11-09 05:28:50,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:50,784 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3522 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:50,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:28:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24503 states. [2024-11-09 05:28:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24503 to 24435. [2024-11-09 05:28:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24435 states, 21227 states have (on average 1.495783671738823) internal successors, (31751), 21294 states have internal predecessors, (31751), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2024-11-09 05:28:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24435 states to 24435 states and 36625 transitions. [2024-11-09 05:28:52,003 INFO L78 Accepts]: Start accepts. Automaton has 24435 states and 36625 transitions. Word has length 138 [2024-11-09 05:28:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:52,004 INFO L471 AbstractCegarLoop]: Abstraction has 24435 states and 36625 transitions. [2024-11-09 05:28:52,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 24435 states and 36625 transitions. [2024-11-09 05:28:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:52,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:52,044 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:52,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:28:52,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:52,245 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:52,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -747414324, now seen corresponding path program 1 times [2024-11-09 05:28:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335091793] [2024-11-09 05:28:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:28:52,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:52,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335091793] [2024-11-09 05:28:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335091793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978694930] [2024-11-09 05:28:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:52,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:52,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:52,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:28:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:52,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:28:52,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:28:52,973 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:28:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978694930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:52,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:28:52,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:28:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353381412] [2024-11-09 05:28:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:52,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:52,978 INFO L87 Difference]: Start difference. First operand 24435 states and 36625 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:55,632 INFO L93 Difference]: Finished difference Result 69628 states and 104218 transitions. [2024-11-09 05:28:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 05:28:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:55,842 INFO L225 Difference]: With dead ends: 69628 [2024-11-09 05:28:55,842 INFO L226 Difference]: Without dead ends: 46839 [2024-11-09 05:28:55,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 05:28:55,903 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3534 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:55,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3534 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46839 states. [2024-11-09 05:28:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46839 to 46707. [2024-11-09 05:28:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46707 states, 40427 states have (on average 1.4708734261755758) internal successors, (59463), 40558 states have internal predecessors, (59463), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2024-11-09 05:28:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46707 states to 46707 states and 68945 transitions. [2024-11-09 05:28:58,820 INFO L78 Accepts]: Start accepts. Automaton has 46707 states and 68945 transitions. Word has length 138 [2024-11-09 05:28:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:58,820 INFO L471 AbstractCegarLoop]: Abstraction has 46707 states and 68945 transitions. [2024-11-09 05:28:58,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:28:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46707 states and 68945 transitions. [2024-11-09 05:28:58,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:28:58,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:58,914 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:28:58,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:28:59,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:59,120 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:59,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1042111468, now seen corresponding path program 1 times [2024-11-09 05:28:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515057211] [2024-11-09 05:28:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:59,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 05:28:59,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515057211] [2024-11-09 05:28:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515057211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:59,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:28:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968345278] [2024-11-09 05:28:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:59,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:28:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:28:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:28:59,928 INFO L87 Difference]: Start difference. First operand 46707 states and 68945 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:29:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:05,144 INFO L93 Difference]: Finished difference Result 146939 states and 215895 transitions. [2024-11-09 05:29:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:29:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2024-11-09 05:29:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:05,884 INFO L225 Difference]: With dead ends: 146939 [2024-11-09 05:29:05,884 INFO L226 Difference]: Without dead ends: 101879 [2024-11-09 05:29:06,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:29:06,038 INFO L432 NwaCegarLoop]: 3318 mSDtfsCounter, 4160 mSDsluCounter, 9812 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 13130 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:06,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4181 Valid, 13130 Invalid, 1336 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [136 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:29:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101879 states. [2024-11-09 05:29:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101879 to 90227. [2024-11-09 05:29:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90227 states, 77931 states have (on average 1.4545046258870027) internal successors, (113351), 78190 states have internal predecessors, (113351), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2024-11-09 05:29:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90227 states to 90227 states and 131793 transitions. [2024-11-09 05:29:11,118 INFO L78 Accepts]: Start accepts. Automaton has 90227 states and 131793 transitions. Word has length 138 [2024-11-09 05:29:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:11,120 INFO L471 AbstractCegarLoop]: Abstraction has 90227 states and 131793 transitions. [2024-11-09 05:29:11,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:29:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 90227 states and 131793 transitions. [2024-11-09 05:29:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 05:29:11,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:11,263 INFO L215 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:29:11,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 05:29:11,263 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:11,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1210206262, now seen corresponding path program 1 times [2024-11-09 05:29:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:11,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674697955] [2024-11-09 05:29:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:29:11,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674697955] [2024-11-09 05:29:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674697955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964024034] [2024-11-09 05:29:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:11,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:11,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:11,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:29:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:11,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:29:11,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 05:29:12,043 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:29:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964024034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:29:12,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:29:12,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:29:12,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306628023] [2024-11-09 05:29:12,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:29:12,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:29:12,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:29:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:29:12,046 INFO L87 Difference]: Start difference. First operand 90227 states and 131793 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:29:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:16,892 INFO L93 Difference]: Finished difference Result 160503 states and 236884 transitions. [2024-11-09 05:29:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:29:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 161 [2024-11-09 05:29:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:17,692 INFO L225 Difference]: With dead ends: 160503 [2024-11-09 05:29:17,693 INFO L226 Difference]: Without dead ends: 115187 [2024-11-09 05:29:18,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 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 05:29:18,167 INFO L432 NwaCegarLoop]: 3453 mSDtfsCounter, 137 mSDsluCounter, 3322 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 6775 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:18,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 6775 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:29:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115187 states. [2024-11-09 05:29:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115187 to 109299. [2024-11-09 05:29:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109299 states, 96491 states have (on average 1.48249059497777) internal successors, (143047), 96750 states have internal predecessors, (143047), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2024-11-09 05:29:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109299 states to 109299 states and 162001 transitions. [2024-11-09 05:29:23,351 INFO L78 Accepts]: Start accepts. Automaton has 109299 states and 162001 transitions. Word has length 161 [2024-11-09 05:29:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:23,351 INFO L471 AbstractCegarLoop]: Abstraction has 109299 states and 162001 transitions. [2024-11-09 05:29:23,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:29:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 109299 states and 162001 transitions. [2024-11-09 05:29:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-09 05:29:23,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:23,625 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:29:23,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:29:23,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:29:23,826 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:23,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash 747609412, now seen corresponding path program 1 times [2024-11-09 05:29:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23535768] [2024-11-09 05:29:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 05:29:24,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:24,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23535768] [2024-11-09 05:29:24,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23535768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:24,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943657638] [2024-11-09 05:29:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:24,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:24,301 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:24,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10510302-3b26-46cb-932b-52f8a59061a7/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:29:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:24,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:29:24,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 05:29:24,925 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:29:24,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943657638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:29:24,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:29:24,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 05:29:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532620140] [2024-11-09 05:29:24,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:29:24,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:29:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:24,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:29:24,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:29:24,928 INFO L87 Difference]: Start difference. First operand 109299 states and 162001 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)