./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E --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 4859a4cdb98a3caca502aed15b30b6d563e2037c3c786a209b1853d003f6e66c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:04:28,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:04:29,068 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:04:29,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:04:29,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:04:29,114 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:04:29,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:04:29,115 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:04:29,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:04:29,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:04:29,116 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:04:29,116 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:04:29,117 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:04:29,117 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:04:29,117 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:04:29,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:04:29,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:04:29,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:04:29,121 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:04:29,121 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:04:29,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:04:29,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:04:29,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:04:29,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:04:29,123 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:04:29,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:04:29,124 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:04:29,124 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:04:29,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:04:29,125 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E 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 -> 4859a4cdb98a3caca502aed15b30b6d563e2037c3c786a209b1853d003f6e66c [2024-11-14 03:04:29,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:04:29,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:04:29,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:04:29,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:04:29,563 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:04:29,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c Unable to find full path for "g++" [2024-11-14 03:04:31,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:04:32,772 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:04:32,774 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c [2024-11-14 03:04:32,831 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/data/e0085617f/65f4ec04c44e4dfc9ea36d02d4996673/FLAG1871ff9bf [2024-11-14 03:04:32,857 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/data/e0085617f/65f4ec04c44e4dfc9ea36d02d4996673 [2024-11-14 03:04:32,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:04:32,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:04:32,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:04:32,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:04:32,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:04:32,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:04:32" (1/1) ... [2024-11-14 03:04:32,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e9e00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:32, skipping insertion in model container [2024-11-14 03:04:32,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:04:32" (1/1) ... [2024-11-14 03:04:33,119 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:04:35,081 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[378560,378573] [2024-11-14 03:04:35,121 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[383339,383352] [2024-11-14 03:04:35,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:04:35,598 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:04:36,634 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[378560,378573] [2024-11-14 03:04:36,641 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[383339,383352] [2024-11-14 03:04:36,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:04:36,742 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:04:36,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36 WrapperNode [2024-11-14 03:04:36,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:04:36,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:04:36,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:04:36,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:04:36,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:36,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:37,581 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13280 [2024-11-14 03:04:37,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:04:37,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:04:37,583 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:04:37,583 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:04:37,591 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:37,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:37,631 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:37,633 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:37,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:38,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:38,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:38,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:38,144 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:04:38,145 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:04:38,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:04:38,146 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:04:38,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (1/1) ... [2024-11-14 03:04:38,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:04:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:38,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:04:38,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:04:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:04:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:04:38,232 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:04:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:04:38,232 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:04:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:04:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:04:38,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:04:38,460 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:04:38,463 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:04:51,658 INFO L? ?]: Removed 1765 outVars from TransFormulas that were not future-live. [2024-11-14 03:04:51,658 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:04:54,665 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:04:54,666 INFO L316 CfgBuilder]: Removed 17 assume(true) statements. [2024-11-14 03:04:54,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:04:54 BoogieIcfgContainer [2024-11-14 03:04:54,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:04:54,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:04:54,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:04:54,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:04:54,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:04:32" (1/3) ... [2024-11-14 03:04:54,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76790d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:04:54, skipping insertion in model container [2024-11-14 03:04:54,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:04:36" (2/3) ... [2024-11-14 03:04:54,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76790d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:04:54, skipping insertion in model container [2024-11-14 03:04:54,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:04:54" (3/3) ... [2024-11-14 03:04:54,679 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.15.cil.c [2024-11-14 03:04:54,718 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:04:54,725 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label42+token_ring.15.cil.c that has 8 procedures, 1862 locations, 1 initial locations, 17 loop locations, and 2 error locations. [2024-11-14 03:04:54,896 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:04:54,920 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@68d51300, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:04:54,920 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:04:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 03:04:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 03:04:54,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:54,966 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:54,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:54,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -219533205, now seen corresponding path program 1 times [2024-11-14 03:04:55,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979332880] [2024-11-14 03:04:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:04:55,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979332880] [2024-11-14 03:04:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979332880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:04:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:04:55,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:04:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177527372] [2024-11-14 03:04:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:04:55,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:04:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:04:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:04:55,804 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:04:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:57,131 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2024-11-14 03:04:57,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:04:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2024-11-14 03:04:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:57,159 INFO L225 Difference]: With dead ends: 3919 [2024-11-14 03:04:57,159 INFO L226 Difference]: Without dead ends: 2056 [2024-11-14 03:04:57,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:04:57,175 INFO L432 NwaCegarLoop]: 3577 mSDtfsCounter, 3848 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7050 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:57,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7050 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:04:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2024-11-14 03:04:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2024-11-14 03:04:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-14 03:04:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2024-11-14 03:04:57,372 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2024-11-14 03:04:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:57,374 INFO L471 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2024-11-14 03:04:57,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:04:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2024-11-14 03:04:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:04:57,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:57,391 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:57,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:04:57,391 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:57,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 14979653, now seen corresponding path program 1 times [2024-11-14 03:04:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076899338] [2024-11-14 03:04:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:04:57,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076899338] [2024-11-14 03:04:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076899338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567274332] [2024-11-14 03:04:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:57,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:57,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:04:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:58,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:04:58,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:04:58,287 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:04:58,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567274332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:04:58,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:04:58,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:04:58,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428121849] [2024-11-14 03:04:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:04:58,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:04:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:04:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:04:58,294 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:04:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:59,250 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2024-11-14 03:04:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:04:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:04:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:59,268 INFO L225 Difference]: With dead ends: 2866 [2024-11-14 03:04:59,268 INFO L226 Difference]: Without dead ends: 2457 [2024-11-14 03:04:59,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:04:59,272 INFO L432 NwaCegarLoop]: 3389 mSDtfsCounter, 3547 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:59,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3651 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:04:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2024-11-14 03:04:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2024-11-14 03:04:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-14 03:04:59,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2024-11-14 03:04:59,385 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2024-11-14 03:04:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:59,387 INFO L471 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2024-11-14 03:04:59,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:04:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2024-11-14 03:04:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:04:59,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:59,394 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:59,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:04:59,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:59,598 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:59,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -507400761, now seen corresponding path program 1 times [2024-11-14 03:04:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463202555] [2024-11-14 03:04:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:04:59,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:59,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463202555] [2024-11-14 03:04:59,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463202555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:59,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507523621] [2024-11-14 03:04:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:59,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:59,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:59,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:05:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:00,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:00,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:05:00,219 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507523621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:00,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:00,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:00,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713812080] [2024-11-14 03:05:00,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:00,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:00,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:00,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:00,222 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:00,890 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2024-11-14 03:05:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:00,912 INFO L225 Difference]: With dead ends: 4048 [2024-11-14 03:05:00,912 INFO L226 Difference]: Without dead ends: 3243 [2024-11-14 03:05:00,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:00,918 INFO L432 NwaCegarLoop]: 3387 mSDtfsCounter, 3565 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:00,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3649 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:05:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2024-11-14 03:05:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2024-11-14 03:05:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-14 03:05:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2024-11-14 03:05:01,073 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2024-11-14 03:05:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:01,074 INFO L471 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2024-11-14 03:05:01,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2024-11-14 03:05:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:01,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:01,083 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:01,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:01,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:01,285 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:01,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:01,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1909216055, now seen corresponding path program 1 times [2024-11-14 03:05:01,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:01,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801360299] [2024-11-14 03:05:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:05:01,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:01,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801360299] [2024-11-14 03:05:01,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801360299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:01,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736552218] [2024-11-14 03:05:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:01,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:01,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:01,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:05:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:01,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:01,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:05:01,966 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:01,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736552218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:01,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583056227] [2024-11-14 03:05:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:01,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:01,970 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:02,666 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2024-11-14 03:05:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:02,695 INFO L225 Difference]: With dead ends: 6388 [2024-11-14 03:05:02,695 INFO L226 Difference]: Without dead ends: 4799 [2024-11-14 03:05:02,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:02,705 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3559 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:02,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:05:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2024-11-14 03:05:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2024-11-14 03:05:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2024-11-14 03:05:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2024-11-14 03:05:02,912 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2024-11-14 03:05:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:02,913 INFO L471 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2024-11-14 03:05:02,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2024-11-14 03:05:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:02,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:02,924 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:02,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:03,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:03,125 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:03,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash -70675125, now seen corresponding path program 1 times [2024-11-14 03:05:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778761155] [2024-11-14 03:05:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:05:03,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778761155] [2024-11-14 03:05:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778761155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680589637] [2024-11-14 03:05:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:03,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:03,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:03,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:05:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:03,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:03,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:05:03,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680589637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:03,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251448230] [2024-11-14 03:05:03,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:03,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:03,672 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:04,991 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2024-11-14 03:05:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:05,037 INFO L225 Difference]: With dead ends: 11020 [2024-11-14 03:05:05,037 INFO L226 Difference]: Without dead ends: 7879 [2024-11-14 03:05:05,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:05,053 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3568 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:05,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:05:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2024-11-14 03:05:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2024-11-14 03:05:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2024-11-14 03:05:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2024-11-14 03:05:05,482 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2024-11-14 03:05:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:05,482 INFO L471 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2024-11-14 03:05:05,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2024-11-14 03:05:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:05,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:05,499 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:05,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:05,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:05,704 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:05,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:05,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1583079671, now seen corresponding path program 1 times [2024-11-14 03:05:05,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:05,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048412356] [2024-11-14 03:05:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:05,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:05:05,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048412356] [2024-11-14 03:05:05,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048412356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:05,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176725175] [2024-11-14 03:05:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:05,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:05,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:05,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:05:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:06,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:06,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:05:06,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176725175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:06,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917138509] [2024-11-14 03:05:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:06,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:06,269 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:07,326 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2024-11-14 03:05:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:07,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:07,440 INFO L225 Difference]: With dead ends: 20188 [2024-11-14 03:05:07,441 INFO L226 Difference]: Without dead ends: 13975 [2024-11-14 03:05:07,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:07,471 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3538 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:07,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:05:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2024-11-14 03:05:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2024-11-14 03:05:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2024-11-14 03:05:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2024-11-14 03:05:08,281 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2024-11-14 03:05:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:08,282 INFO L471 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2024-11-14 03:05:08,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2024-11-14 03:05:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:08,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:08,311 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:08,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:05:08,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:08,516 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:08,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1366010183, now seen corresponding path program 1 times [2024-11-14 03:05:08,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:08,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144662474] [2024-11-14 03:05:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:05:08,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144662474] [2024-11-14 03:05:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144662474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:08,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537304331] [2024-11-14 03:05:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:08,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:08,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:08,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:05:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:09,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:09,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:05:09,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:09,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537304331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:09,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:09,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041199605] [2024-11-14 03:05:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:09,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:09,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:09,182 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:10,971 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2024-11-14 03:05:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:10,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:11,172 INFO L225 Difference]: With dead ends: 38332 [2024-11-14 03:05:11,173 INFO L226 Difference]: Without dead ends: 26039 [2024-11-14 03:05:11,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:11,221 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3541 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:11,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:05:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2024-11-14 03:05:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2024-11-14 03:05:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2024-11-14 03:05:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2024-11-14 03:05:12,574 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2024-11-14 03:05:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:12,575 INFO L471 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2024-11-14 03:05:12,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2024-11-14 03:05:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:12,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:12,629 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:12,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:12,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:12,830 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:12,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -149156279, now seen corresponding path program 1 times [2024-11-14 03:05:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452421566] [2024-11-14 03:05:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:05:13,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452421566] [2024-11-14 03:05:13,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452421566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076551352] [2024-11-14 03:05:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:13,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:13,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:13,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:05:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:13,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:13,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:05:13,454 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:13,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076551352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:13,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:13,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:05:13,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420126205] [2024-11-14 03:05:13,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:13,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:13,458 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:17,018 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2024-11-14 03:05:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 03:05:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:17,283 INFO L225 Difference]: With dead ends: 74236 [2024-11-14 03:05:17,283 INFO L226 Difference]: Without dead ends: 49911 [2024-11-14 03:05:17,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:17,355 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3553 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:17,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:05:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states. [2024-11-14 03:05:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49911 to 49779. [2024-11-14 03:05:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49779 states, 43243 states have (on average 1.4757301759822399) internal successors, (63815), 43374 states have internal predecessors, (63815), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2024-11-14 03:05:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49779 states to 49779 states and 73809 transitions. [2024-11-14 03:05:19,960 INFO L78 Accepts]: Start accepts. Automaton has 49779 states and 73809 transitions. Word has length 145 [2024-11-14 03:05:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:19,960 INFO L471 AbstractCegarLoop]: Abstraction has 49779 states and 73809 transitions. [2024-11-14 03:05:19,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:05:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 49779 states and 73809 transitions. [2024-11-14 03:05:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:05:20,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:20,089 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:05:20,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:05:20,294 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:20,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash 593690699, now seen corresponding path program 1 times [2024-11-14 03:05:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:20,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408031635] [2024-11-14 03:05:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:20,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:05:20,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408031635] [2024-11-14 03:05:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408031635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:05:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:05:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861080145] [2024-11-14 03:05:20,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:20,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:05:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:05:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:05:20,984 INFO L87 Difference]: Start difference. First operand 49779 states and 73809 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:05:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:27,142 INFO L93 Difference]: Finished difference Result 157179 states and 232279 transitions. [2024-11-14 03:05:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:05:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2024-11-14 03:05:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:27,744 INFO L225 Difference]: With dead ends: 157179 [2024-11-14 03:05:27,744 INFO L226 Difference]: Without dead ends: 109047 [2024-11-14 03:05:27,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:05:27,858 INFO L432 NwaCegarLoop]: 3348 mSDtfsCounter, 4217 mSDsluCounter, 6646 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 9994 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:27,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4239 Valid, 9994 Invalid, 1079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [128 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:05:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109047 states. [2024-11-14 03:05:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109047 to 96371. [2024-11-14 03:05:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96371 states, 83563 states have (on average 1.4606344913418619) internal successors, (122055), 83822 states have internal predecessors, (122055), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2024-11-14 03:05:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96371 states to 96371 states and 141521 transitions. [2024-11-14 03:05:32,939 INFO L78 Accepts]: Start accepts. Automaton has 96371 states and 141521 transitions. Word has length 145 [2024-11-14 03:05:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:32,941 INFO L471 AbstractCegarLoop]: Abstraction has 96371 states and 141521 transitions. [2024-11-14 03:05:32,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:05:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96371 states and 141521 transitions. [2024-11-14 03:05:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-14 03:05:33,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:33,061 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:33,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:05:33,062 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:33,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -92222025, now seen corresponding path program 1 times [2024-11-14 03:05:33,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330964062] [2024-11-14 03:05:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:33,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:05:33,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330964062] [2024-11-14 03:05:33,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330964062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040007370] [2024-11-14 03:05:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:33,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:33,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:33,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:05:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:34,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:34,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:05:34,105 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:34,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040007370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:34,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:05:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504824698] [2024-11-14 03:05:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:34,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:34,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:34,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:05:34,108 INFO L87 Difference]: Start difference. First operand 96371 states and 141521 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:05:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:38,450 INFO L93 Difference]: Finished difference Result 171511 states and 254548 transitions. [2024-11-14 03:05:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:05:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 169 [2024-11-14 03:05:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:39,038 INFO L225 Difference]: With dead ends: 171511 [2024-11-14 03:05:39,038 INFO L226 Difference]: Without dead ends: 123123 [2024-11-14 03:05:39,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:05:39,136 INFO L432 NwaCegarLoop]: 3480 mSDtfsCounter, 147 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6820 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:39,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 6820 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:05:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2024-11-14 03:05:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 116979. [2024-11-14 03:05:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116979 states, 103659 states have (on average 1.4886406390183198) internal successors, (154311), 103918 states have internal predecessors, (154311), 9990 states have call successors, (9990), 3329 states have call predecessors, (9990), 3328 states have return successors, (9988), 9732 states have call predecessors, (9988), 9988 states have call successors, (9988) [2024-11-14 03:05:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116979 states to 116979 states and 174289 transitions. [2024-11-14 03:05:44,659 INFO L78 Accepts]: Start accepts. Automaton has 116979 states and 174289 transitions. Word has length 169 [2024-11-14 03:05:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:44,659 INFO L471 AbstractCegarLoop]: Abstraction has 116979 states and 174289 transitions. [2024-11-14 03:05:44,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:05:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 116979 states and 174289 transitions. [2024-11-14 03:05:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-14 03:05:44,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:44,919 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:44,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:05:45,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:05:45,124 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:45,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2006267560, now seen corresponding path program 1 times [2024-11-14 03:05:45,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:45,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463694691] [2024-11-14 03:05:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:45,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:05:45,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463694691] [2024-11-14 03:05:45,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463694691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905644025] [2024-11-14 03:05:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:45,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:45,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa47369-6b6a-45c1-8424-6c2867d730d5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:05:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:45,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:05:45,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 03:05:46,192 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:05:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905644025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-14 03:05:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618478190] [2024-11-14 03:05:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:46,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:05:46,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:05:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:05:46,194 INFO L87 Difference]: Start difference. First operand 116979 states and 174289 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)