./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c633b25b4ec43f32a8252bdc35a2fbecdeeeba9961d16af4e4c5eb75bb72dd2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:40,190 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:40,336 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:40,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:40,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:40,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:40,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:40,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:40,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:40,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:40,378 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:40,379 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:40,380 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:40,387 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:40,388 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:40,388 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:40,389 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:40,389 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:40,390 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:40,390 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:40,391 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:40,391 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:40,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:40,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:40,394 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:40,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:40,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:40,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:40,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:40,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:40,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:40,398 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:40,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:40,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:40,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:40,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:40,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:40,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:40,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:40,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:40,400 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:40,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:40,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:40,401 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:40,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:40,402 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_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c633b25b4ec43f32a8252bdc35a2fbecdeeeba9961d16af4e4c5eb75bb72dd2 [2023-11-19 05:03:40,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:40,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:40,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:40,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:40,784 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:40,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c [2023-11-19 05:03:43,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:44,763 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:44,764 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c [2023-11-19 05:03:44,825 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/data/466c583e0/9cedd71be2404da38a99be6dc321b4c2/FLAGc535d4c8c [2023-11-19 05:03:44,843 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/data/466c583e0/9cedd71be2404da38a99be6dc321b4c2 [2023-11-19 05:03:44,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:44,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:44,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:44,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:44,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:44,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:44" (1/1) ... [2023-11-19 05:03:44,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b784b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:44, skipping insertion in model container [2023-11-19 05:03:44,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:44" (1/1) ... [2023-11-19 05:03:45,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:47,531 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c[382357,382370] [2023-11-19 05:03:47,570 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c[383339,383352] [2023-11-19 05:03:47,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:47,844 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:49,087 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c[382357,382370] [2023-11-19 05:03:49,090 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-2.c[383339,383352] [2023-11-19 05:03:49,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:49,201 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:49,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49 WrapperNode [2023-11-19 05:03:49,202 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:49,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:49,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:49,204 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:49,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:49,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:49,927 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12934 [2023-11-19 05:03:49,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:49,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:49,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:49,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:49,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:49,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:50,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:50,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:50,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:50,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (1/1) ... [2023-11-19 05:03:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:50,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:50,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:03:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:03:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:03:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:03:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:03:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:03:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:03:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:03:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:03:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:03:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:03:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:03:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:03:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:03:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:50,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:51,190 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:51,193 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:04:01,474 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:04:04,422 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:04:04,422 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 05:04:04,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:04 BoogieIcfgContainer [2023-11-19 05:04:04,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:04:04,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:04:04,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:04:04,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:04:04,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:44" (1/3) ... [2023-11-19 05:04:04,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdef5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:04, skipping insertion in model container [2023-11-19 05:04:04,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:49" (2/3) ... [2023-11-19 05:04:04,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdef5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:04, skipping insertion in model container [2023-11-19 05:04:04,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:04" (3/3) ... [2023-11-19 05:04:04,448 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.07.cil-2.c [2023-11-19 05:04:04,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:04:04,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:04:04,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:04:04,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41f2c03b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:04:04,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:04:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 05:04:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:04:04,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:04,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:04,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:04,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 294945015, now seen corresponding path program 1 times [2023-11-19 05:04:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:04,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578772851] [2023-11-19 05:04:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:04:05,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578772851] [2023-11-19 05:04:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578772851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:05,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:05,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:04:05,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33590591] [2023-11-19 05:04:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:05,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:05,228 INFO L87 Difference]: Start difference. First operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:04:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:06,239 INFO L93 Difference]: Finished difference Result 3703 states and 7191 transitions. [2023-11-19 05:04:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:04:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 53 [2023-11-19 05:04:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:06,272 INFO L225 Difference]: With dead ends: 3703 [2023-11-19 05:04:06,272 INFO L226 Difference]: Without dead ends: 1912 [2023-11-19 05:04:06,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:06,288 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3638 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 6688 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:06,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 6688 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:04:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2023-11-19 05:04:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1911. [2023-11-19 05:04:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1857 states have (on average 1.9289176090468498) internal successors, (3582), 1861 states have internal predecessors, (3582), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-19 05:04:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 3660 transitions. [2023-11-19 05:04:06,466 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 3660 transitions. Word has length 53 [2023-11-19 05:04:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:06,467 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 3660 transitions. [2023-11-19 05:04:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:04:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 3660 transitions. [2023-11-19 05:04:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:06,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:06,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:06,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:04:06,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:06,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1332610041, now seen corresponding path program 1 times [2023-11-19 05:04:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078824678] [2023-11-19 05:04:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:06,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078824678] [2023-11-19 05:04:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078824678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064722595] [2023-11-19 05:04:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:06,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:04:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:07,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:07,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:04:07,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064722595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421211156] [2023-11-19 05:04:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:07,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:07,347 INFO L87 Difference]: Start difference. First operand 1911 states and 3660 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:07,921 INFO L93 Difference]: Finished difference Result 2434 states and 4437 transitions. [2023-11-19 05:04:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 103 [2023-11-19 05:04:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:07,944 INFO L225 Difference]: With dead ends: 2434 [2023-11-19 05:04:07,944 INFO L226 Difference]: Without dead ends: 2169 [2023-11-19 05:04:07,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:07,949 INFO L413 NwaCegarLoop]: 3279 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:07,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3444 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2023-11-19 05:04:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2163. [2023-11-19 05:04:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2065 states have (on average 1.8794188861985472) internal successors, (3881), 2070 states have internal predecessors, (3881), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-19 05:04:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 4023 transitions. [2023-11-19 05:04:08,081 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 4023 transitions. Word has length 103 [2023-11-19 05:04:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:08,082 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 4023 transitions. [2023-11-19 05:04:08,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 4023 transitions. [2023-11-19 05:04:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:08,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:08,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:08,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:04:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 05:04:08,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:08,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 541745339, now seen corresponding path program 1 times [2023-11-19 05:04:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:08,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680005896] [2023-11-19 05:04:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:08,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:08,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680005896] [2023-11-19 05:04:08,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680005896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:08,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466589503] [2023-11-19 05:04:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:08,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:08,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:08,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:08,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:04:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:08,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:08,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:04:08,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466589503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:08,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:08,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450421047] [2023-11-19 05:04:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:08,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:08,845 INFO L87 Difference]: Start difference. First operand 2163 states and 4023 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:09,442 INFO L93 Difference]: Finished difference Result 3184 states and 5534 transitions. [2023-11-19 05:04:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 103 [2023-11-19 05:04:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:09,466 INFO L225 Difference]: With dead ends: 3184 [2023-11-19 05:04:09,466 INFO L226 Difference]: Without dead ends: 2667 [2023-11-19 05:04:09,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:09,473 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 3451 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:09,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3424 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2023-11-19 05:04:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2659. [2023-11-19 05:04:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2475 states have (on average 1.804848484848485) internal successors, (4467), 2482 states have internal predecessors, (4467), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 05:04:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 4733 transitions. [2023-11-19 05:04:09,607 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 4733 transitions. Word has length 103 [2023-11-19 05:04:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:09,609 INFO L495 AbstractCegarLoop]: Abstraction has 2659 states and 4733 transitions. [2023-11-19 05:04:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 4733 transitions. [2023-11-19 05:04:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:09,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:09,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:09,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:09,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:09,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1343577091, now seen corresponding path program 1 times [2023-11-19 05:04:09,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133662270] [2023-11-19 05:04:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:09,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133662270] [2023-11-19 05:04:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133662270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142531960] [2023-11-19 05:04:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:09,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:09,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:04:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:10,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:10,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:04:10,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142531960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:10,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980822270] [2023-11-19 05:04:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:10,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:10,238 INFO L87 Difference]: Start difference. First operand 2659 states and 4733 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:10,813 INFO L93 Difference]: Finished difference Result 4660 states and 7678 transitions. [2023-11-19 05:04:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:10,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 103 [2023-11-19 05:04:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:10,839 INFO L225 Difference]: With dead ends: 4660 [2023-11-19 05:04:10,839 INFO L226 Difference]: Without dead ends: 3647 [2023-11-19 05:04:10,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:10,846 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3454 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:10,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 3440 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2023-11-19 05:04:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3635. [2023-11-19 05:04:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3283 states have (on average 1.7103259214133415) internal successors, (5615), 3294 states have internal predecessors, (5615), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-19 05:04:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 6121 transitions. [2023-11-19 05:04:11,005 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 6121 transitions. Word has length 103 [2023-11-19 05:04:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:11,005 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 6121 transitions. [2023-11-19 05:04:11,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 6121 transitions. [2023-11-19 05:04:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:11,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:11,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:11,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:11,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:11,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1696759429, now seen corresponding path program 1 times [2023-11-19 05:04:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084158617] [2023-11-19 05:04:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:04:11,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:11,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084158617] [2023-11-19 05:04:11,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084158617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:11,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749513264] [2023-11-19 05:04:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:11,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:11,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:11,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:04:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:11,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:04:11,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:04:11,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:11,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749513264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:11,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:11,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:04:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117912793] [2023-11-19 05:04:11,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:11,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:11,673 INFO L87 Difference]: Start difference. First operand 3635 states and 6121 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:12,464 INFO L93 Difference]: Finished difference Result 7564 states and 11866 transitions. [2023-11-19 05:04:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 103 [2023-11-19 05:04:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:12,501 INFO L225 Difference]: With dead ends: 7564 [2023-11-19 05:04:12,501 INFO L226 Difference]: Without dead ends: 5575 [2023-11-19 05:04:12,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:12,510 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3439 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:12,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:04:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-11-19 05:04:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5555. [2023-11-19 05:04:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 4875 states have (on average 1.612923076923077) internal successors, (7863), 4894 states have internal predecessors, (7863), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 05:04:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 8833 transitions. [2023-11-19 05:04:12,741 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 8833 transitions. Word has length 103 [2023-11-19 05:04:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:12,742 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 8833 transitions. [2023-11-19 05:04:12,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:04:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 8833 transitions. [2023-11-19 05:04:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:04:12,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:12,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:12,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:12,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:12,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:12,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -328788035, now seen corresponding path program 1 times [2023-11-19 05:04:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:12,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592501880] [2023-11-19 05:04:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:04:13,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:13,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592501880] [2023-11-19 05:04:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592501880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:13,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:13,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:13,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810294551] [2023-11-19 05:04:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:13,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:13,099 INFO L87 Difference]: Start difference. First operand 5555 states and 8833 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:04:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:13,810 INFO L93 Difference]: Finished difference Result 8663 states and 13380 transitions. [2023-11-19 05:04:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 103 [2023-11-19 05:04:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:13,857 INFO L225 Difference]: With dead ends: 8663 [2023-11-19 05:04:13,857 INFO L226 Difference]: Without dead ends: 6643 [2023-11-19 05:04:13,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:13,867 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 89 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:13,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6560 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:04:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2023-11-19 05:04:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6323. [2023-11-19 05:04:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 5611 states have (on average 1.6095170201390125) internal successors, (9031), 5630 states have internal predecessors, (9031), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-19 05:04:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10033 transitions. [2023-11-19 05:04:14,148 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10033 transitions. Word has length 103 [2023-11-19 05:04:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:14,149 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10033 transitions. [2023-11-19 05:04:14,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:04:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10033 transitions. [2023-11-19 05:04:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 05:04:14,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:14,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:04:14,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:04:14,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:14,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash -796501164, now seen corresponding path program 1 times [2023-11-19 05:04:14,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:14,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107618014] [2023-11-19 05:04:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 05:04:14,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107618014] [2023-11-19 05:04:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107618014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:14,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266427440] [2023-11-19 05:04:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:14,278 INFO L87 Difference]: Start difference. First operand 6323 states and 10033 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:15,196 INFO L93 Difference]: Finished difference Result 15532 states and 23546 transitions. [2023-11-19 05:04:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-19 05:04:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:15,245 INFO L225 Difference]: With dead ends: 15532 [2023-11-19 05:04:15,246 INFO L226 Difference]: Without dead ends: 10855 [2023-11-19 05:04:15,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:15,264 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3442 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:15,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2023-11-19 05:04:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10803. [2023-11-19 05:04:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 9419 states have (on average 1.5363626711965177) internal successors, (14471), 9454 states have internal predecessors, (14471), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-19 05:04:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 16401 transitions. [2023-11-19 05:04:15,912 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 16401 transitions. Word has length 139 [2023-11-19 05:04:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:15,912 INFO L495 AbstractCegarLoop]: Abstraction has 10803 states and 16401 transitions. [2023-11-19 05:04:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 16401 transitions. [2023-11-19 05:04:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 05:04:15,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:15,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:04:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:04:15,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:15,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1112319664, now seen corresponding path program 1 times [2023-11-19 05:04:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:15,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242595839] [2023-11-19 05:04:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 05:04:16,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242595839] [2023-11-19 05:04:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242595839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:16,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:16,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509339944] [2023-11-19 05:04:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:16,098 INFO L87 Difference]: Start difference. First operand 10803 states and 16401 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:17,382 INFO L93 Difference]: Finished difference Result 28828 states and 42618 transitions. [2023-11-19 05:04:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-19 05:04:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:17,469 INFO L225 Difference]: With dead ends: 28828 [2023-11-19 05:04:17,470 INFO L226 Difference]: Without dead ends: 19671 [2023-11-19 05:04:17,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:17,509 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3444 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:17,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2023-11-19 05:04:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19571. [2023-11-19 05:04:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19571 states, 16875 states have (on average 1.4833185185185185) internal successors, (25031), 16942 states have internal predecessors, (25031), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-19 05:04:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19571 states to 19571 states and 28753 transitions. [2023-11-19 05:04:18,484 INFO L78 Accepts]: Start accepts. Automaton has 19571 states and 28753 transitions. Word has length 139 [2023-11-19 05:04:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:18,485 INFO L495 AbstractCegarLoop]: Abstraction has 19571 states and 28753 transitions. [2023-11-19 05:04:18,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 19571 states and 28753 transitions. [2023-11-19 05:04:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-19 05:04:18,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:18,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:04:18,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:04:18,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:18,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash 50614131, now seen corresponding path program 1 times [2023-11-19 05:04:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:18,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026741140] [2023-11-19 05:04:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:18,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 05:04:18,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026741140] [2023-11-19 05:04:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026741140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:18,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:04:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270368870] [2023-11-19 05:04:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:18,671 INFO L87 Difference]: Start difference. First operand 19571 states and 28753 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:20,460 INFO L93 Difference]: Finished difference Result 54844 states and 79578 transitions. [2023-11-19 05:04:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:04:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-19 05:04:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:20,601 INFO L225 Difference]: With dead ends: 54844 [2023-11-19 05:04:20,602 INFO L226 Difference]: Without dead ends: 36919 [2023-11-19 05:04:20,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:04:20,668 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:20,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:04:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36919 states. [2023-11-19 05:04:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36919 to 36723. [2023-11-19 05:04:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36723 states, 31467 states have (on average 1.446308831474243) internal successors, (45511), 31598 states have internal predecessors, (45511), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-11-19 05:04:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36723 states to 36723 states and 52689 transitions. [2023-11-19 05:04:22,422 INFO L78 Accepts]: Start accepts. Automaton has 36723 states and 52689 transitions. Word has length 139 [2023-11-19 05:04:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:22,423 INFO L495 AbstractCegarLoop]: Abstraction has 36723 states and 52689 transitions. [2023-11-19 05:04:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:04:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36723 states and 52689 transitions. [2023-11-19 05:04:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-19 05:04:22,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:22,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:04:22,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:22,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1752755961, now seen corresponding path program 1 times [2023-11-19 05:04:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966732036] [2023-11-19 05:04:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 05:04:23,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966732036] [2023-11-19 05:04:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966732036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775437450] [2023-11-19 05:04:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:23,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:23,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:23,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35b4116-ec5e-4000-bd1f-a6f94ba4cc2e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:04:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:23,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:23,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 05:04:23,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775437450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:23,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:04:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646638763] [2023-11-19 05:04:23,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:23,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:04:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:04:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:23,349 INFO L87 Difference]: Start difference. First operand 36723 states and 52689 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)