./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59889c869f0503702a707a8a5c510d219998ebb909bdbb124a0f8dd8888d2da1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:25,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:26,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:26,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:26,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:26,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:26,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:26,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:26,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:26,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:26,105 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:26,106 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:26,107 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:26,108 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:26,109 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:26,109 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:26,110 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:26,110 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:26,111 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:26,111 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:26,112 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:26,112 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:26,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:26,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:26,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:26,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:26,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:26,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:26,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:26,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:26,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:26,124 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:26,124 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:26,124 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:26,124 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:26,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:26,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:26,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:26,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:26,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:26,126 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:26,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:26,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:26,127 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:26,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:26,128 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_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59889c869f0503702a707a8a5c510d219998ebb909bdbb124a0f8dd8888d2da1 [2023-11-12 01:03:26,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:26,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:26,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:26,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:26,448 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:26,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c [2023-11-12 01:03:29,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:30,292 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:30,293 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c [2023-11-12 01:03:30,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/data/6a19134e3/85880177cc5a4e56ad69a747e1c4d430/FLAG061adaeee [2023-11-12 01:03:30,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/data/6a19134e3/85880177cc5a4e56ad69a747e1c4d430 [2023-11-12 01:03:30,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:30,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:30,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:30,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:30,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:30,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:30" (1/1) ... [2023-11-12 01:03:30,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cba8411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:30, skipping insertion in model container [2023-11-12 01:03:30,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:30" (1/1) ... [2023-11-12 01:03:30,726 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:32,985 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_be3f0778-6e82-4e39-a8ca-7727f3504f6a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c[380323,380336] [2023-11-12 01:03:33,015 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_be3f0778-6e82-4e39-a8ca-7727f3504f6a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c[383339,383352] [2023-11-12 01:03:33,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:33,415 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:34,663 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_be3f0778-6e82-4e39-a8ca-7727f3504f6a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c[380323,380336] [2023-11-12 01:03:34,669 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_be3f0778-6e82-4e39-a8ca-7727f3504f6a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-2.c[383339,383352] [2023-11-12 01:03:34,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:34,777 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:34,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34 WrapperNode [2023-11-12 01:03:34,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:34,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:34,780 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:34,780 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:34,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:34,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,435 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13168 [2023-11-12 01:03:35,436 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:35,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:35,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:35,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:35,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,597 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:35,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:36,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:36,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:36,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:36,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:36,110 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:36,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:36,111 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (1/1) ... [2023-11-12 01:03:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:36,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:36,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:36,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 01:03:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 01:03:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 01:03:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 01:03:36,322 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 01:03:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 01:03:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 01:03:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 01:03:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 01:03:36,323 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 01:03:36,324 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 01:03:36,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 01:03:36,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:36,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:36,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:36,469 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:36,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:46,791 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:49,704 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:49,704 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-12 01:03:49,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:49 BoogieIcfgContainer [2023-11-12 01:03:49,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:49,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:49,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:49,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:49,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:30" (1/3) ... [2023-11-12 01:03:49,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488baf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:49, skipping insertion in model container [2023-11-12 01:03:49,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:34" (2/3) ... [2023-11-12 01:03:49,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488baf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:49, skipping insertion in model container [2023-11-12 01:03:49,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:49" (3/3) ... [2023-11-12 01:03:49,722 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.11.cil-2.c [2023-11-12 01:03:49,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:49,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 01:03:49,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:49,883 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;@21a5466f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:49,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 01:03:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 01:03:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 01:03:49,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:49,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:49,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:49,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1881452552, now seen corresponding path program 1 times [2023-11-12 01:03:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001244460] [2023-11-12 01:03:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:50,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:50,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001244460] [2023-11-12 01:03:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001244460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610802840] [2023-11-12 01:03:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:50,711 INFO L87 Difference]: Start difference. First operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:03:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:51,995 INFO L93 Difference]: Finished difference Result 3836 states and 7407 transitions. [2023-11-12 01:03:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2023-11-12 01:03:51,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:52,026 INFO L225 Difference]: With dead ends: 3836 [2023-11-12 01:03:52,026 INFO L226 Difference]: Without dead ends: 2003 [2023-11-12 01:03:52,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:52,039 INFO L413 NwaCegarLoop]: 3505 mSDtfsCounter, 3770 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3770 SdHoareTripleChecker+Valid, 6916 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:52,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3770 Valid, 6916 Invalid, 724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 01:03:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-11-12 01:03:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2002. [2023-11-12 01:03:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1942 states have (on average 1.9114315139031925) internal successors, (3712), 1945 states have internal predecessors, (3712), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-12 01:03:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 3804 transitions. [2023-11-12 01:03:52,198 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 3804 transitions. Word has length 64 [2023-11-12 01:03:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 2002 states and 3804 transitions. [2023-11-12 01:03:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:03:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 3804 transitions. [2023-11-12 01:03:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:03:52,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:52,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:52,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:03:52,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:52,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1187846797, now seen corresponding path program 1 times [2023-11-12 01:03:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:52,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697068140] [2023-11-12 01:03:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:52,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:03:52,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697068140] [2023-11-12 01:03:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697068140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629474302] [2023-11-12 01:03:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:52,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:52,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:03:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:53,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:03:53,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 01:03:53,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629474302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:53,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:03:53,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:03:53,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669401959] [2023-11-12 01:03:53,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:53,261 INFO L87 Difference]: Start difference. First operand 2002 states and 3804 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:53,873 INFO L93 Difference]: Finished difference Result 2707 states and 4877 transitions. [2023-11-12 01:03:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:03:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:53,894 INFO L225 Difference]: With dead ends: 2707 [2023-11-12 01:03:53,894 INFO L226 Difference]: Without dead ends: 2351 [2023-11-12 01:03:53,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:53,898 INFO L413 NwaCegarLoop]: 3337 mSDtfsCounter, 3501 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:53,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3559 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:03:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2023-11-12 01:03:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2347. [2023-11-12 01:03:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2235 states have (on average 1.8527964205816554) internal successors, (4141), 2239 states have internal predecessors, (4141), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-12 01:03:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 4313 transitions. [2023-11-12 01:03:53,992 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 4313 transitions. Word has length 130 [2023-11-12 01:03:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:53,993 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 4313 transitions. [2023-11-12 01:03:53,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 4313 transitions. [2023-11-12 01:03:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:03:53,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:53,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:54,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 01:03:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 01:03:54,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:54,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash 84637707, now seen corresponding path program 1 times [2023-11-12 01:03:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737958783] [2023-11-12 01:03:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:03:54,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:54,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737958783] [2023-11-12 01:03:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737958783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307573271] [2023-11-12 01:03:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:54,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:54,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:03:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:54,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:03:54,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 01:03:54,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:54,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307573271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:54,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:03:54,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:03:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846407000] [2023-11-12 01:03:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:54,837 INFO L87 Difference]: Start difference. First operand 2347 states and 4313 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:55,489 INFO L93 Difference]: Finished difference Result 3736 states and 6420 transitions. [2023-11-12 01:03:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:03:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:55,513 INFO L225 Difference]: With dead ends: 3736 [2023-11-12 01:03:55,513 INFO L226 Difference]: Without dead ends: 3035 [2023-11-12 01:03:55,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:55,524 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3513 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3539 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:55,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3539 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:03:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2023-11-12 01:03:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3029. [2023-11-12 01:03:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2815 states have (on average 1.7715808170515097) internal successors, (4987), 2821 states have internal predecessors, (4987), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-12 01:03:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 5315 transitions. [2023-11-12 01:03:55,658 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 5315 transitions. Word has length 130 [2023-11-12 01:03:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:55,658 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 5315 transitions. [2023-11-12 01:03:55,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 5315 transitions. [2023-11-12 01:03:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:03:55,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:55,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:55,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:55,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 01:03:55,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:55,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1411614857, now seen corresponding path program 1 times [2023-11-12 01:03:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985350959] [2023-11-12 01:03:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:55,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:03:56,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985350959] [2023-11-12 01:03:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985350959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073019996] [2023-11-12 01:03:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:56,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:56,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:03:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:56,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:03:56,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:03:56,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073019996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:56,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:03:56,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:03:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472314326] [2023-11-12 01:03:56,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:56,454 INFO L87 Difference]: Start difference. First operand 3029 states and 5315 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:57,126 INFO L93 Difference]: Finished difference Result 5770 states and 9456 transitions. [2023-11-12 01:03:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:03:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:57,163 INFO L225 Difference]: With dead ends: 5770 [2023-11-12 01:03:57,164 INFO L226 Difference]: Without dead ends: 4387 [2023-11-12 01:03:57,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:57,173 INFO L413 NwaCegarLoop]: 3315 mSDtfsCounter, 3519 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:57,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3537 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:03:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2023-11-12 01:03:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4377. [2023-11-12 01:03:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 3963 states have (on average 1.679283371183447) internal successors, (6655), 3973 states have internal predecessors, (6655), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-12 01:03:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 7287 transitions. [2023-11-12 01:03:57,536 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 7287 transitions. Word has length 130 [2023-11-12 01:03:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 4377 states and 7287 transitions. [2023-11-12 01:03:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 7287 transitions. [2023-11-12 01:03:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:03:57,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:57,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:57,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:57,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 01:03:57,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:57,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1581302407, now seen corresponding path program 1 times [2023-11-12 01:03:57,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:57,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252375639] [2023-11-12 01:03:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:57,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:03:57,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252375639] [2023-11-12 01:03:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252375639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690068217] [2023-11-12 01:03:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:57,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:57,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:58,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:03:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:58,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:03:58,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 01:03:58,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:58,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690068217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:58,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:03:58,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:03:58,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130487279] [2023-11-12 01:03:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:58,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:58,300 INFO L87 Difference]: Start difference. First operand 4377 states and 7287 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:59,042 INFO L93 Difference]: Finished difference Result 9790 states and 15428 transitions. [2023-11-12 01:03:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:03:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:59,096 INFO L225 Difference]: With dead ends: 9790 [2023-11-12 01:03:59,096 INFO L226 Difference]: Without dead ends: 7059 [2023-11-12 01:03:59,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:03:59,114 INFO L413 NwaCegarLoop]: 3286 mSDtfsCounter, 3522 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:03:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2023-11-12 01:03:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7041. [2023-11-12 01:03:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 6235 states have (on average 1.5947072975140337) internal successors, (9943), 6253 states have internal predecessors, (9943), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-12 01:03:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 11167 transitions. [2023-11-12 01:03:59,491 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 11167 transitions. Word has length 130 [2023-11-12 01:03:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:59,492 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 11167 transitions. [2023-11-12 01:03:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:03:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 11167 transitions. [2023-11-12 01:03:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:03:59,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:59,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:59,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:59,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:59,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1566597065, now seen corresponding path program 1 times [2023-11-12 01:03:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675861059] [2023-11-12 01:03:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:59,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:03:59,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675861059] [2023-11-12 01:03:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675861059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855796521] [2023-11-12 01:03:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:59,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:59,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:04:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:00,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:04:00,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 01:04:00,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:04:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855796521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:00,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:04:00,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:04:00,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491275317] [2023-11-12 01:04:00,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:00,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:00,292 INFO L87 Difference]: Start difference. First operand 7041 states and 11167 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:04:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:01,257 INFO L93 Difference]: Finished difference Result 17734 states and 27172 transitions. [2023-11-12 01:04:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:04:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:01,332 INFO L225 Difference]: With dead ends: 17734 [2023-11-12 01:04:01,332 INFO L226 Difference]: Without dead ends: 12339 [2023-11-12 01:04:01,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:01,354 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 3495 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:01,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3526 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:04:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12339 states. [2023-11-12 01:04:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12339 to 12305. [2023-11-12 01:04:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12305 states, 10731 states have (on average 1.5304258689777281) internal successors, (16423), 10765 states have internal predecessors, (16423), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-11-12 01:04:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12305 states to 12305 states and 18799 transitions. [2023-11-12 01:04:01,921 INFO L78 Accepts]: Start accepts. Automaton has 12305 states and 18799 transitions. Word has length 130 [2023-11-12 01:04:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 12305 states and 18799 transitions. [2023-11-12 01:04:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:04:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12305 states and 18799 transitions. [2023-11-12 01:04:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:04:01,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:01,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:01,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:02,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:02,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:02,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -887475257, now seen corresponding path program 1 times [2023-11-12 01:04:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:02,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110958523] [2023-11-12 01:04:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:04:02,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110958523] [2023-11-12 01:04:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110958523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218310470] [2023-11-12 01:04:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:02,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:02,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:04:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:04:02,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 01:04:02,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:04:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218310470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:02,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:04:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:04:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696925286] [2023-11-12 01:04:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:02,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:02,685 INFO L87 Difference]: Start difference. First operand 12305 states and 18799 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:04:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:04,061 INFO L93 Difference]: Finished difference Result 33430 states and 50260 transitions. [2023-11-12 01:04:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-11-12 01:04:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:04,174 INFO L225 Difference]: With dead ends: 33430 [2023-11-12 01:04:04,175 INFO L226 Difference]: Without dead ends: 22771 [2023-11-12 01:04:04,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:04,233 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 3507 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:04,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3526 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:04:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22771 states. [2023-11-12 01:04:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22771 to 22705. [2023-11-12 01:04:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 19627 states have (on average 1.4872879197024507) internal successors, (29191), 19693 states have internal predecessors, (29191), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-11-12 01:04:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 33807 transitions. [2023-11-12 01:04:05,592 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 33807 transitions. Word has length 130 [2023-11-12 01:04:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:05,593 INFO L495 AbstractCegarLoop]: Abstraction has 22705 states and 33807 transitions. [2023-11-12 01:04:05,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:04:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 33807 transitions. [2023-11-12 01:04:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 01:04:05,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:05,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:05,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 01:04:05,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3f0778-6e82-4e39-a8ca-7727f3504f6a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 01:04:05,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:05,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash 263191237, now seen corresponding path program 1 times [2023-11-12 01:04:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:05,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254552513] [2023-11-12 01:04:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 01:04:06,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:06,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254552513] [2023-11-12 01:04:06,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254552513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:06,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:06,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:04:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427275907] [2023-11-12 01:04:06,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:06,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:06,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:04:06,678 INFO L87 Difference]: Start difference. First operand 22705 states and 33807 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 01:04:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:09,408 INFO L93 Difference]: Finished difference Result 67061 states and 98769 transitions. [2023-11-12 01:04:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:04:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2023-11-12 01:04:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:09,655 INFO L225 Difference]: With dead ends: 67061 [2023-11-12 01:04:09,656 INFO L226 Difference]: Without dead ends: 46003 [2023-11-12 01:04:09,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:04:09,743 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 4028 mSDsluCounter, 6539 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4048 SdHoareTripleChecker+Valid, 9849 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:09,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4048 Valid, 9849 Invalid, 1024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [106 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 01:04:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46003 states.