./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/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 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:09:41,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:09:41,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:09:41,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:09:41,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:09:41,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:09:41,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:09:41,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:09:41,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:09:41,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:09:41,410 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:09:41,410 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:09:41,410 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:09:41,410 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:09:41,410 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:09:41,411 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:09:41,411 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:09:41,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:09:41,412 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:09:41,412 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:09:41,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:09:41,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:09:41,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:09:41,413 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:09:41,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:09:41,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:09:41,413 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:09:41,413 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:09:41,416 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:09:41,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:09:41,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:09:41,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:09:41,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:09:41,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:09:41,419 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:09:41,420 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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/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 -> 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b [2024-11-14 05:09:41,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:09:41,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:09:41,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:09:41,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:09:41,841 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:09:41,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c Unable to find full path for "g++" [2024-11-14 05:09:44,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:09:44,527 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:09:44,528 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2024-11-14 05:09:44,545 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/data/fc33e0b58/12788da87fc94a6090798abacca9d8fb/FLAGd0c539159 [2024-11-14 05:09:44,572 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/data/fc33e0b58/12788da87fc94a6090798abacca9d8fb [2024-11-14 05:09:44,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:09:44,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:09:44,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:09:44,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:09:44,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:09:44,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:09:44" (1/1) ... [2024-11-14 05:09:44,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762f7c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:44, skipping insertion in model container [2024-11-14 05:09:44,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:09:44" (1/1) ... [2024-11-14 05:09:44,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:09:44,863 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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2024-11-14 05:09:44,968 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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2024-11-14 05:09:45,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:09:45,110 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:09:45,124 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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2024-11-14 05:09:45,151 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_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2024-11-14 05:09:45,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:09:45,250 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:09:45,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45 WrapperNode [2024-11-14 05:09:45,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:09:45,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:09:45,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:09:45,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:09:45,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,331 INFO L138 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 878 [2024-11-14 05:09:45,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:09:45,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:09:45,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:09:45,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:09:45,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:09:45,413 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:09:45,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:09:45,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:09:45,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (1/1) ... [2024-11-14 05:09:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:09:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:09:45,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:09:45,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:09:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:09:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 05:09:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 05:09:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 05:09:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 05:09:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 05:09:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 05:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 05:09:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 05:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 05:09:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 05:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 05:09:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 05:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 05:09:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 05:09:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 05:09:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 05:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 05:09:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 05:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 05:09:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 05:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 05:09:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 05:09:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:09:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 05:09:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 05:09:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 05:09:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 05:09:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:09:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:09:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 05:09:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 05:09:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 05:09:45,515 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 05:09:45,760 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:09:45,763 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:09:47,011 INFO L? ?]: Removed 113 outVars from TransFormulas that were not future-live. [2024-11-14 05:09:47,012 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:09:47,762 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:09:47,765 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-14 05:09:47,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:09:47 BoogieIcfgContainer [2024-11-14 05:09:47,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:09:47,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:09:47,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:09:47,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:09:47,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:09:44" (1/3) ... [2024-11-14 05:09:47,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7a6d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:09:47, skipping insertion in model container [2024-11-14 05:09:47,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:09:45" (2/3) ... [2024-11-14 05:09:47,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7a6d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:09:47, skipping insertion in model container [2024-11-14 05:09:47,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:09:47" (3/3) ... [2024-11-14 05:09:47,783 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2024-11-14 05:09:47,803 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:09:47,806 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.09.cil-2.c that has 16 procedures, 243 locations, 1 initial locations, 16 loop locations, and 2 error locations. [2024-11-14 05:09:47,907 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:09:47,928 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;@f137ad6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:09:47,929 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 05:09:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 186 states have (on average 1.510752688172043) internal successors, (281), 194 states have internal predecessors, (281), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-14 05:09:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:09:47,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:47,950 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] [2024-11-14 05:09:47,951 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:47,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1972058735, now seen corresponding path program 1 times [2024-11-14 05:09:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:47,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427683889] [2024-11-14 05:09:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:49,003 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 05:09:49,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427683889] [2024-11-14 05:09:49,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427683889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:49,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:09:49,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:09:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97205812] [2024-11-14 05:09:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:49,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:09:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:09:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:09:49,044 INFO L87 Difference]: Start difference. First operand has 243 states, 186 states have (on average 1.510752688172043) internal successors, (281), 194 states have internal predecessors, (281), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 05:09:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:50,800 INFO L93 Difference]: Finished difference Result 542 states and 786 transitions. [2024-11-14 05:09:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:09:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-14 05:09:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:50,817 INFO L225 Difference]: With dead ends: 542 [2024-11-14 05:09:50,818 INFO L226 Difference]: Without dead ends: 302 [2024-11-14 05:09:50,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:09:50,827 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 514 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:50,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1062 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 05:09:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-14 05:09:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 289. [2024-11-14 05:09:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.4363636363636363) internal successors, (316), 225 states have internal predecessors, (316), 47 states have call successors, (47), 22 states have call predecessors, (47), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-14 05:09:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 406 transitions. [2024-11-14 05:09:50,950 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 406 transitions. Word has length 45 [2024-11-14 05:09:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:50,951 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 406 transitions. [2024-11-14 05:09:50,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 05:09:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 406 transitions. [2024-11-14 05:09:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:09:50,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:50,956 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] [2024-11-14 05:09:50,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:09:50,957 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:50,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1718903004, now seen corresponding path program 1 times [2024-11-14 05:09:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804117913] [2024-11-14 05:09:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:51,118 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 05:09:51,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804117913] [2024-11-14 05:09:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804117913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:51,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:09:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:09:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325765320] [2024-11-14 05:09:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:51,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:09:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:09:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:51,123 INFO L87 Difference]: Start difference. First operand 289 states and 406 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:51,365 INFO L93 Difference]: Finished difference Result 514 states and 693 transitions. [2024-11-14 05:09:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:09:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-11-14 05:09:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:51,374 INFO L225 Difference]: With dead ends: 514 [2024-11-14 05:09:51,374 INFO L226 Difference]: Without dead ends: 398 [2024-11-14 05:09:51,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:51,376 INFO L432 NwaCegarLoop]: 286 mSDtfsCounter, 317 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:51,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 349 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:09:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-14 05:09:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2024-11-14 05:09:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 285 states have (on average 1.3894736842105264) internal successors, (396), 290 states have internal predecessors, (396), 63 states have call successors, (63), 36 states have call predecessors, (63), 34 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2024-11-14 05:09:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 518 transitions. [2024-11-14 05:09:51,468 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 518 transitions. Word has length 46 [2024-11-14 05:09:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:51,468 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 518 transitions. [2024-11-14 05:09:51,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 518 transitions. [2024-11-14 05:09:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:09:51,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:51,474 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] [2024-11-14 05:09:51,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:09:51,475 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:51,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2062891394, now seen corresponding path program 1 times [2024-11-14 05:09:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553557096] [2024-11-14 05:09:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:51,613 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 05:09:51,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:51,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553557096] [2024-11-14 05:09:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553557096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:51,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:09:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:09:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133353062] [2024-11-14 05:09:51,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:51,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:09:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:09:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:51,618 INFO L87 Difference]: Start difference. First operand 384 states and 518 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:51,874 INFO L93 Difference]: Finished difference Result 748 states and 966 transitions. [2024-11-14 05:09:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:09:51,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-14 05:09:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:51,879 INFO L225 Difference]: With dead ends: 748 [2024-11-14 05:09:51,880 INFO L226 Difference]: Without dead ends: 538 [2024-11-14 05:09:51,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:51,882 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 68 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:51,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 554 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:09:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2024-11-14 05:09:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 534. [2024-11-14 05:09:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 390 states have (on average 1.3615384615384616) internal successors, (531), 395 states have internal predecessors, (531), 87 states have call successors, (87), 57 states have call predecessors, (87), 55 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2024-11-14 05:09:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 701 transitions. [2024-11-14 05:09:51,948 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 701 transitions. Word has length 47 [2024-11-14 05:09:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:51,948 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 701 transitions. [2024-11-14 05:09:51,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 701 transitions. [2024-11-14 05:09:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:09:51,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:51,951 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] [2024-11-14 05:09:51,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:09:51,952 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:51,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1772880000, now seen corresponding path program 1 times [2024-11-14 05:09:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915812207] [2024-11-14 05:09:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:51,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:52,024 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 05:09:52,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:52,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915812207] [2024-11-14 05:09:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915812207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:52,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:09:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:09:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296730409] [2024-11-14 05:09:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:52,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:09:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:09:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:52,030 INFO L87 Difference]: Start difference. First operand 534 states and 701 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:52,276 INFO L93 Difference]: Finished difference Result 958 states and 1223 transitions. [2024-11-14 05:09:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:09:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-14 05:09:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:52,284 INFO L225 Difference]: With dead ends: 958 [2024-11-14 05:09:52,285 INFO L226 Difference]: Without dead ends: 597 [2024-11-14 05:09:52,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:09:52,287 INFO L432 NwaCegarLoop]: 294 mSDtfsCounter, 317 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:52,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 356 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:09:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2024-11-14 05:09:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 585. [2024-11-14 05:09:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 426 states have (on average 1.3450704225352113) internal successors, (573), 431 states have internal predecessors, (573), 95 states have call successors, (95), 64 states have call predecessors, (95), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2024-11-14 05:09:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2024-11-14 05:09:52,384 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 53 [2024-11-14 05:09:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:52,384 INFO L471 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2024-11-14 05:09:52,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:09:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2024-11-14 05:09:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:09:52,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:52,387 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:09:52,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:09:52,388 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:52,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash -261488788, now seen corresponding path program 1 times [2024-11-14 05:09:52,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302077532] [2024-11-14 05:09:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:09:52,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:52,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302077532] [2024-11-14 05:09:52,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302077532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:09:52,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:09:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:09:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515847052] [2024-11-14 05:09:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:09:52,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:09:52,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:09:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:09:52,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:09:52,536 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 05:09:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:09:53,066 INFO L93 Difference]: Finished difference Result 694 states and 891 transitions. [2024-11-14 05:09:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:09:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-14 05:09:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:09:53,073 INFO L225 Difference]: With dead ends: 694 [2024-11-14 05:09:53,076 INFO L226 Difference]: Without dead ends: 691 [2024-11-14 05:09:53,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:09:53,080 INFO L432 NwaCegarLoop]: 291 mSDtfsCounter, 572 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:09:53,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 335 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:09:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2024-11-14 05:09:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 584. [2024-11-14 05:09:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 426 states have (on average 1.3380281690140845) internal successors, (570), 430 states have internal predecessors, (570), 94 states have call successors, (94), 64 states have call predecessors, (94), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2024-11-14 05:09:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2024-11-14 05:09:53,187 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 54 [2024-11-14 05:09:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:09:53,192 INFO L471 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2024-11-14 05:09:53,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 05:09:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2024-11-14 05:09:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:09:53,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:09:53,194 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:09:53,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 05:09:53,195 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:09:53,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:09:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 482542666, now seen corresponding path program 1 times [2024-11-14 05:09:53,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:09:53,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965485237] [2024-11-14 05:09:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:09:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:09:53,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:09:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965485237] [2024-11-14 05:09:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965485237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:09:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135538860] [2024-11-14 05:09:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:09:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:09:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:09:53,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:09:53,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:09:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:09:53,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:09:53,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:09:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:09:54,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:09:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:09:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135538860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:09:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455197503] [2024-11-14 05:09:54,286 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 05:09:54,286 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:09:54,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:09:54,296 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:09:54,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:10:01,687 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 181 for LOIs [2024-11-14 05:10:01,762 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 177 for LOIs [2024-11-14 05:10:01,832 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 185 for LOIs [2024-11-14 05:10:02,846 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 181 for LOIs [2024-11-14 05:10:03,071 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 181 for LOIs [2024-11-14 05:10:03,337 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 181 for LOIs [2024-11-14 05:10:03,415 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 188 for LOIs [2024-11-14 05:10:03,497 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:10:27,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1455197503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:27,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:10:27,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 05:10:27,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090517359] [2024-11-14 05:10:27,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:27,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:10:27,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:27,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:10:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 05:10:27,532 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:10:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:48,377 INFO L93 Difference]: Finished difference Result 1021 states and 1284 transitions. [2024-11-14 05:10:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:10:48,378 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-14 05:10:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:48,383 INFO L225 Difference]: With dead ends: 1021 [2024-11-14 05:10:48,383 INFO L226 Difference]: Without dead ends: 611 [2024-11-14 05:10:48,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:10:48,386 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 125 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 3749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:48,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 2201 Invalid, 3749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [100 Valid, 3649 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-14 05:10:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-11-14 05:10:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 603. [2024-11-14 05:10:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 443 states have (on average 1.3318284424379232) internal successors, (590), 447 states have internal predecessors, (590), 95 states have call successors, (95), 65 states have call predecessors, (95), 63 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-14 05:10:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 777 transitions. [2024-11-14 05:10:48,520 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 777 transitions. Word has length 55 [2024-11-14 05:10:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:48,521 INFO L471 AbstractCegarLoop]: Abstraction has 603 states and 777 transitions. [2024-11-14 05:10:48,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:10:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 777 transitions. [2024-11-14 05:10:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 05:10:48,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:48,522 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 05:10:48,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:10:48,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 05:10:48,723 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:48,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1777354648, now seen corresponding path program 1 times [2024-11-14 05:10:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622033675] [2024-11-14 05:10:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:10:48,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622033675] [2024-11-14 05:10:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622033675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:48,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:10:48,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:10:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280765336] [2024-11-14 05:10:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:48,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:10:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:10:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:10:48,820 INFO L87 Difference]: Start difference. First operand 603 states and 777 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:10:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:49,097 INFO L93 Difference]: Finished difference Result 1054 states and 1333 transitions. [2024-11-14 05:10:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:10:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2024-11-14 05:10:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:49,105 INFO L225 Difference]: With dead ends: 1054 [2024-11-14 05:10:49,106 INFO L226 Difference]: Without dead ends: 786 [2024-11-14 05:10:49,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:10:49,110 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 44 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:49,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 599 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:10:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-11-14 05:10:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 657. [2024-11-14 05:10:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 487 states have (on average 1.3326488706365502) internal successors, (649), 491 states have internal predecessors, (649), 100 states have call successors, (100), 70 states have call predecessors, (100), 68 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-14 05:10:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 846 transitions. [2024-11-14 05:10:49,241 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 846 transitions. Word has length 61 [2024-11-14 05:10:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:49,242 INFO L471 AbstractCegarLoop]: Abstraction has 657 states and 846 transitions. [2024-11-14 05:10:49,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:10:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 846 transitions. [2024-11-14 05:10:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 05:10:49,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:49,244 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] [2024-11-14 05:10:49,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 05:10:49,245 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:49,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -955502547, now seen corresponding path program 1 times [2024-11-14 05:10:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503714605] [2024-11-14 05:10:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:49,442 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 05:10:49,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503714605] [2024-11-14 05:10:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503714605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:49,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:10:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:10:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487467294] [2024-11-14 05:10:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:49,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:10:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:10:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:10:49,444 INFO L87 Difference]: Start difference. First operand 657 states and 846 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 05:10:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:50,626 INFO L93 Difference]: Finished difference Result 1430 states and 2080 transitions. [2024-11-14 05:10:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:10:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 59 [2024-11-14 05:10:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:50,637 INFO L225 Difference]: With dead ends: 1430 [2024-11-14 05:10:50,637 INFO L226 Difference]: Without dead ends: 1267 [2024-11-14 05:10:50,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:10:50,640 INFO L432 NwaCegarLoop]: 465 mSDtfsCounter, 1230 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:50,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 1196 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:10:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2024-11-14 05:10:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1254. [2024-11-14 05:10:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 987 states have (on average 1.403242147922999) internal successors, (1385), 994 states have internal predecessors, (1385), 173 states have call successors, (173), 94 states have call predecessors, (173), 92 states have return successors, (220), 167 states have call predecessors, (220), 170 states have call successors, (220) [2024-11-14 05:10:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1778 transitions. [2024-11-14 05:10:50,826 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1778 transitions. Word has length 59 [2024-11-14 05:10:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:50,826 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1778 transitions. [2024-11-14 05:10:50,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 05:10:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1778 transitions. [2024-11-14 05:10:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:10:50,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:50,830 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:10:50,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:10:50,830 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:50,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash 196426312, now seen corresponding path program 1 times [2024-11-14 05:10:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:50,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150744481] [2024-11-14 05:10:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:10:51,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150744481] [2024-11-14 05:10:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150744481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781506729] [2024-11-14 05:10:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:51,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:51,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:10:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:51,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:10:51,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:10:51,702 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:10:51,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781506729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:51,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:10:51,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2024-11-14 05:10:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376368908] [2024-11-14 05:10:51,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:51,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:10:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:10:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:10:51,704 INFO L87 Difference]: Start difference. First operand 1254 states and 1778 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:52,031 INFO L93 Difference]: Finished difference Result 1591 states and 2203 transitions. [2024-11-14 05:10:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:10:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 05:10:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:52,041 INFO L225 Difference]: With dead ends: 1591 [2024-11-14 05:10:52,042 INFO L226 Difference]: Without dead ends: 1269 [2024-11-14 05:10:52,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:10:52,044 INFO L432 NwaCegarLoop]: 323 mSDtfsCounter, 47 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:52,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 600 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:10:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2024-11-14 05:10:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1250. [2024-11-14 05:10:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 983 states have (on average 1.3896236012207528) internal successors, (1366), 990 states have internal predecessors, (1366), 173 states have call successors, (173), 94 states have call predecessors, (173), 92 states have return successors, (220), 167 states have call predecessors, (220), 170 states have call successors, (220) [2024-11-14 05:10:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1759 transitions. [2024-11-14 05:10:52,236 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1759 transitions. Word has length 102 [2024-11-14 05:10:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:52,237 INFO L471 AbstractCegarLoop]: Abstraction has 1250 states and 1759 transitions. [2024-11-14 05:10:52,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1759 transitions. [2024-11-14 05:10:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:10:52,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:52,245 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:10:52,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:10:52,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:52,449 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:52,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1772984071, now seen corresponding path program 1 times [2024-11-14 05:10:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141262813] [2024-11-14 05:10:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:10:53,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:53,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141262813] [2024-11-14 05:10:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141262813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:53,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741891670] [2024-11-14 05:10:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:53,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:53,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:53,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:10:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:53,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:10:53,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:10:53,338 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:10:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741891670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:53,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:10:53,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 05:10:53,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65378570] [2024-11-14 05:10:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:53,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:10:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:10:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:10:53,340 INFO L87 Difference]: Start difference. First operand 1250 states and 1759 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:53,895 INFO L93 Difference]: Finished difference Result 1587 states and 2164 transitions. [2024-11-14 05:10:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:10:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 05:10:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:53,906 INFO L225 Difference]: With dead ends: 1587 [2024-11-14 05:10:53,906 INFO L226 Difference]: Without dead ends: 1108 [2024-11-14 05:10:53,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:10:53,910 INFO L432 NwaCegarLoop]: 297 mSDtfsCounter, 267 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:53,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1131 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:10:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2024-11-14 05:10:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1104. [2024-11-14 05:10:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 888 states have (on average 1.4087837837837838) internal successors, (1251), 895 states have internal predecessors, (1251), 145 states have call successors, (145), 71 states have call predecessors, (145), 69 states have return successors, (192), 139 states have call predecessors, (192), 142 states have call successors, (192) [2024-11-14 05:10:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1588 transitions. [2024-11-14 05:10:54,081 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1588 transitions. Word has length 102 [2024-11-14 05:10:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:54,082 INFO L471 AbstractCegarLoop]: Abstraction has 1104 states and 1588 transitions. [2024-11-14 05:10:54,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1588 transitions. [2024-11-14 05:10:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 05:10:54,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:54,086 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:10:54,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:10:54,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:10:54,287 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:54,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1818356445, now seen corresponding path program 1 times [2024-11-14 05:10:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:54,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056087365] [2024-11-14 05:10:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 05:10:54,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056087365] [2024-11-14 05:10:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056087365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535084719] [2024-11-14 05:10:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:54,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:54,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:54,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:54,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:10:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:54,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:10:54,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:10:54,847 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:10:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535084719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:10:54,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:10:54,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-14 05:10:54,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969564273] [2024-11-14 05:10:54,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:10:54,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:10:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:10:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:10:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:10:54,851 INFO L87 Difference]: Start difference. First operand 1104 states and 1588 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:10:55,176 INFO L93 Difference]: Finished difference Result 1351 states and 1896 transitions. [2024-11-14 05:10:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:10:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-14 05:10:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:10:55,187 INFO L225 Difference]: With dead ends: 1351 [2024-11-14 05:10:55,187 INFO L226 Difference]: Without dead ends: 1105 [2024-11-14 05:10:55,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:10:55,190 INFO L432 NwaCegarLoop]: 316 mSDtfsCounter, 53 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:10:55,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 579 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:10:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2024-11-14 05:10:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1027. [2024-11-14 05:10:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 832 states have (on average 1.40625) internal successors, (1170), 839 states have internal predecessors, (1170), 134 states have call successors, (134), 61 states have call predecessors, (134), 59 states have return successors, (181), 128 states have call predecessors, (181), 131 states have call successors, (181) [2024-11-14 05:10:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1485 transitions. [2024-11-14 05:10:55,374 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1485 transitions. Word has length 104 [2024-11-14 05:10:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:10:55,374 INFO L471 AbstractCegarLoop]: Abstraction has 1027 states and 1485 transitions. [2024-11-14 05:10:55,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:10:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1485 transitions. [2024-11-14 05:10:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 05:10:55,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:10:55,378 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:10:55,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:10:55,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:55,582 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:10:55,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:10:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1418365246, now seen corresponding path program 1 times [2024-11-14 05:10:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:10:55,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142968640] [2024-11-14 05:10:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:10:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 05:10:55,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:10:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142968640] [2024-11-14 05:10:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142968640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:10:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008602645] [2024-11-14 05:10:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:10:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:10:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:10:55,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:10:55,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:10:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:10:56,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:10:56,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:10:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:10:56,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:10:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 05:10:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008602645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:10:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326509987] [2024-11-14 05:10:56,771 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 05:10:56,771 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:10:56,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:10:56,772 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:10:56,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:11:18,086 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 219 for LOIs [2024-11-14 05:11:18,494 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 190 for LOIs [2024-11-14 05:11:18,918 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 140 for LOIs [2024-11-14 05:11:18,963 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2024-11-14 05:11:21,697 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2024-11-14 05:11:24,306 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 154 for LOIs [2024-11-14 05:11:24,495 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 198 for LOIs [2024-11-14 05:11:24,870 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 209 for LOIs [2024-11-14 05:11:25,199 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:20,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29816#(and (= ~q_req_up~0 1) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (= 0 ~t9_pc~0) (= ~E_2~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_19| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 0))))) (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (not (= ~p_dw_st~0 0)))) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 05:12:20,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:20,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 05:12:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270894738] [2024-11-14 05:12:20,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:20,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:12:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:12:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:12:20,283 INFO L87 Difference]: Start difference. First operand 1027 states and 1485 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 05:12:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:24,462 INFO L93 Difference]: Finished difference Result 1967 states and 2572 transitions. [2024-11-14 05:12:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 05:12:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-14 05:12:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:24,474 INFO L225 Difference]: With dead ends: 1967 [2024-11-14 05:12:24,474 INFO L226 Difference]: Without dead ends: 1785 [2024-11-14 05:12:24,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4816 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 05:12:24,480 INFO L432 NwaCegarLoop]: 273 mSDtfsCounter, 1339 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:24,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 2064 Invalid, 2910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 05:12:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2024-11-14 05:12:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1422. [2024-11-14 05:12:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1117 states have (on average 1.3473589973142346) internal successors, (1505), 1124 states have internal predecessors, (1505), 192 states have call successors, (192), 113 states have call predecessors, (192), 111 states have return successors, (239), 186 states have call predecessors, (239), 189 states have call successors, (239) [2024-11-14 05:12:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1936 transitions. [2024-11-14 05:12:24,716 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1936 transitions. Word has length 104 [2024-11-14 05:12:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:24,716 INFO L471 AbstractCegarLoop]: Abstraction has 1422 states and 1936 transitions. [2024-11-14 05:12:24,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 05:12:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1936 transitions. [2024-11-14 05:12:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 05:12:24,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:24,720 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:12:24,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:24,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:24,921 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:24,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1299963638, now seen corresponding path program 1 times [2024-11-14 05:12:24,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:24,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485870791] [2024-11-14 05:12:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 05:12:24,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485870791] [2024-11-14 05:12:24,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485870791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:24,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:12:24,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:12:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544552135] [2024-11-14 05:12:24,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:25,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:12:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:12:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:12:25,001 INFO L87 Difference]: Start difference. First operand 1422 states and 1936 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 05:12:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:25,356 INFO L93 Difference]: Finished difference Result 1921 states and 2508 transitions. [2024-11-14 05:12:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:12:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-14 05:12:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:25,366 INFO L225 Difference]: With dead ends: 1921 [2024-11-14 05:12:25,366 INFO L226 Difference]: Without dead ends: 1412 [2024-11-14 05:12:25,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:12:25,369 INFO L432 NwaCegarLoop]: 320 mSDtfsCounter, 313 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:25,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 386 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2024-11-14 05:12:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1403. [2024-11-14 05:12:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1100 states have (on average 1.339090909090909) internal successors, (1473), 1107 states have internal predecessors, (1473), 191 states have call successors, (191), 112 states have call predecessors, (191), 110 states have return successors, (238), 185 states have call predecessors, (238), 188 states have call successors, (238) [2024-11-14 05:12:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1902 transitions. [2024-11-14 05:12:25,629 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1902 transitions. Word has length 108 [2024-11-14 05:12:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:25,630 INFO L471 AbstractCegarLoop]: Abstraction has 1403 states and 1902 transitions. [2024-11-14 05:12:25,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 05:12:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1902 transitions. [2024-11-14 05:12:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 05:12:25,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:25,633 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 05:12:25,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 05:12:25,634 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:25,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1145347672, now seen corresponding path program 1 times [2024-11-14 05:12:25,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:25,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495408683] [2024-11-14 05:12:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:25,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:12:25,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495408683] [2024-11-14 05:12:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495408683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406733301] [2024-11-14 05:12:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:25,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:25,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:25,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:12:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:26,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:12:26,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:12:26,124 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:12:26,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406733301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:26,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:12:26,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 05:12:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745906601] [2024-11-14 05:12:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:26,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:12:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:12:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:12:26,126 INFO L87 Difference]: Start difference. First operand 1403 states and 1902 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:12:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:26,673 INFO L93 Difference]: Finished difference Result 1923 states and 2496 transitions. [2024-11-14 05:12:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:12:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-14 05:12:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:26,684 INFO L225 Difference]: With dead ends: 1923 [2024-11-14 05:12:26,685 INFO L226 Difference]: Without dead ends: 1374 [2024-11-14 05:12:26,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:12:26,688 INFO L432 NwaCegarLoop]: 309 mSDtfsCounter, 44 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:26,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1487 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:12:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-14 05:12:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1314. [2024-11-14 05:12:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1039 states have (on average 1.3503368623676613) internal successors, (1403), 1046 states have internal predecessors, (1403), 176 states have call successors, (176), 99 states have call predecessors, (176), 97 states have return successors, (223), 170 states have call predecessors, (223), 173 states have call successors, (223) [2024-11-14 05:12:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1802 transitions. [2024-11-14 05:12:26,916 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1802 transitions. Word has length 112 [2024-11-14 05:12:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:26,917 INFO L471 AbstractCegarLoop]: Abstraction has 1314 states and 1802 transitions. [2024-11-14 05:12:26,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:12:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1802 transitions. [2024-11-14 05:12:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 05:12:26,921 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:26,921 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:26,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:27,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:27,122 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:27,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash -163452303, now seen corresponding path program 1 times [2024-11-14 05:12:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:27,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371357605] [2024-11-14 05:12:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:27,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 05:12:27,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:27,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371357605] [2024-11-14 05:12:27,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371357605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:27,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:12:27,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:12:27,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409784155] [2024-11-14 05:12:27,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:27,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:12:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:12:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:12:27,282 INFO L87 Difference]: Start difference. First operand 1314 states and 1802 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 05:12:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:27,835 INFO L93 Difference]: Finished difference Result 2063 states and 2647 transitions. [2024-11-14 05:12:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:12:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-14 05:12:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:27,846 INFO L225 Difference]: With dead ends: 2063 [2024-11-14 05:12:27,846 INFO L226 Difference]: Without dead ends: 1606 [2024-11-14 05:12:27,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:12:27,849 INFO L432 NwaCegarLoop]: 314 mSDtfsCounter, 302 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:27,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1316 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:12:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-11-14 05:12:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1572. [2024-11-14 05:12:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1201 states have (on average 1.318068276436303) internal successors, (1583), 1214 states have internal predecessors, (1583), 224 states have call successors, (224), 141 states have call predecessors, (224), 145 states have return successors, (283), 218 states have call predecessors, (283), 221 states have call successors, (283) [2024-11-14 05:12:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2090 transitions. [2024-11-14 05:12:28,163 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2090 transitions. Word has length 113 [2024-11-14 05:12:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:28,163 INFO L471 AbstractCegarLoop]: Abstraction has 1572 states and 2090 transitions. [2024-11-14 05:12:28,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 05:12:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2090 transitions. [2024-11-14 05:12:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 05:12:28,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:28,167 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:28,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 05:12:28,167 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:28,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -56350384, now seen corresponding path program 1 times [2024-11-14 05:12:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:28,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864509725] [2024-11-14 05:12:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:12:29,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:29,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864509725] [2024-11-14 05:12:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864509725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:29,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441150225] [2024-11-14 05:12:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:29,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:29,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:29,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:29,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:12:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:29,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 05:12:29,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:30,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 05:12:33,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441150225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505570546] [2024-11-14 05:12:33,484 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 05:12:33,484 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:33,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:33,484 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:33,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:08,179 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 230 for LOIs [2024-11-14 05:13:08,383 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 05:13:08,384 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 05:13:08,387 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 194 for LOIs [2024-11-14 05:13:09,729 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 195 for LOIs [2024-11-14 05:13:10,932 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 05:13:10,963 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2024-11-14 05:13:11,150 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2024-11-14 05:13:11,397 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:29,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49909#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-14 05:13:29,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:29,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:29,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 63 [2024-11-14 05:13:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234057226] [2024-11-14 05:13:29,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:29,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 05:13:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 05:13:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=11399, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 05:13:29,267 INFO L87 Difference]: Start difference. First operand 1572 states and 2090 transitions. Second operand has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-14 05:14:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:03,569 INFO L93 Difference]: Finished difference Result 5307 states and 6704 transitions. [2024-11-14 05:14:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2024-11-14 05:14:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) Word has length 114 [2024-11-14 05:14:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:03,592 INFO L225 Difference]: With dead ends: 5307 [2024-11-14 05:14:03,593 INFO L226 Difference]: Without dead ends: 4592 [2024-11-14 05:14:03,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 296 SyntacticMatches, 7 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 93387 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=21001, Invalid=202255, Unknown=0, NotChecked=0, Total=223256 [2024-11-14 05:14:03,631 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 7379 mSDsluCounter, 5740 mSDsCounter, 0 mSdLazyCounter, 8978 mSolverCounterSat, 3679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7379 SdHoareTripleChecker+Valid, 6068 SdHoareTripleChecker+Invalid, 12657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3679 IncrementalHoareTripleChecker+Valid, 8978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:03,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7379 Valid, 6068 Invalid, 12657 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3679 Valid, 8978 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-14 05:14:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2024-11-14 05:14:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2078. [2024-11-14 05:14:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 1555 states have (on average 1.279742765273312) internal successors, (1990), 1570 states have internal predecessors, (1990), 296 states have call successors, (296), 199 states have call predecessors, (296), 225 states have return successors, (383), 310 states have call predecessors, (383), 293 states have call successors, (383) [2024-11-14 05:14:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 2669 transitions. [2024-11-14 05:14:04,237 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 2669 transitions. Word has length 114 [2024-11-14 05:14:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:04,240 INFO L471 AbstractCegarLoop]: Abstraction has 2078 states and 2669 transitions. [2024-11-14 05:14:04,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-14 05:14:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 2669 transitions. [2024-11-14 05:14:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 05:14:04,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:04,246 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:14:04,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:04,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:14:04,451 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:04,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:04,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1219087394, now seen corresponding path program 1 times [2024-11-14 05:14:04,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:04,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065321646] [2024-11-14 05:14:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:04,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:14:04,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065321646] [2024-11-14 05:14:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065321646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:04,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937057620] [2024-11-14 05:14:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:04,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:04,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:04,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:05,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:14:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:05,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:14:05,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:14:05,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:14:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937057620] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:14:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 05:14:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845349448] [2024-11-14 05:14:05,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:05,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:14:05,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:14:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:14:05,592 INFO L87 Difference]: Start difference. First operand 2078 states and 2669 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:14:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:06,993 INFO L93 Difference]: Finished difference Result 3662 states and 4523 transitions. [2024-11-14 05:14:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:14:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-14 05:14:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:07,006 INFO L225 Difference]: With dead ends: 3662 [2024-11-14 05:14:07,006 INFO L226 Difference]: Without dead ends: 2441 [2024-11-14 05:14:07,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:14:07,011 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 448 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:07,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 853 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:14:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2024-11-14 05:14:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2120. [2024-11-14 05:14:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1576 states have (on average 1.2785532994923858) internal successors, (2015), 1591 states have internal predecessors, (2015), 311 states have call successors, (311), 204 states have call predecessors, (311), 231 states have return successors, (411), 326 states have call predecessors, (411), 308 states have call successors, (411) [2024-11-14 05:14:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2737 transitions. [2024-11-14 05:14:07,692 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2737 transitions. Word has length 115 [2024-11-14 05:14:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:07,692 INFO L471 AbstractCegarLoop]: Abstraction has 2120 states and 2737 transitions. [2024-11-14 05:14:07,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:14:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2737 transitions. [2024-11-14 05:14:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 05:14:07,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:07,698 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:07,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:07,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:14:07,903 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:07,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2128842048, now seen corresponding path program 1 times [2024-11-14 05:14:07,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:07,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198932766] [2024-11-14 05:14:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:07,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 05:14:08,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:08,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198932766] [2024-11-14 05:14:08,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198932766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300691136] [2024-11-14 05:14:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:08,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:08,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:08,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:08,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:14:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:09,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 05:14:09,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:10,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:14:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300691136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064611539] [2024-11-14 05:14:11,757 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:14:11,757 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:11,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:11,757 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:11,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:32,673 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 231 for LOIs [2024-11-14 05:14:32,893 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 05:14:32,919 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 05:14:32,923 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 195 for LOIs [2024-11-14 05:14:34,018 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 196 for LOIs [2024-11-14 05:14:35,088 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 05:14:35,115 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 189 for LOIs [2024-11-14 05:14:35,302 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 200 for LOIs [2024-11-14 05:14:35,509 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:54,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71181#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_45| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 2147483647) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 0)))) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~q_free~0_107 Int) (v_~q_req_up~0_107 Int)) (and (or (and (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_107 0)) (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_107 1) (= ~p_dw_st~0 0))) (or (exists ((v_~p_dw_pc~0_50 Int) (v_~p_dw_st~0_143 Int)) (and (or (and (= v_~q_req_up~0_107 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~p_dw_st~0_143 1) (<= ~p_last_write~0 2147483647)) (and (= v_~p_dw_st~0_143 1) (= v_~p_dw_pc~0_50 0))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_72| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483648)))) (= v_~p_dw_pc~0_50 0)) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_72| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483648)))) (= v_~p_dw_pc~0_50 1))))) (= ~p_dw_st~0 0)))) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 05:14:54,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:54,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:54,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 05:14:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898029082] [2024-11-14 05:14:54,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:54,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:14:54,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:14:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 05:14:54,377 INFO L87 Difference]: Start difference. First operand 2120 states and 2737 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 05:15:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:04,475 INFO L93 Difference]: Finished difference Result 4714 states and 5771 transitions. [2024-11-14 05:15:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-14 05:15:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 05:15:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:04,491 INFO L225 Difference]: With dead ends: 4714 [2024-11-14 05:15:04,491 INFO L226 Difference]: Without dead ends: 3451 [2024-11-14 05:15:04,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15911 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 05:15:04,500 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 5269 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 6746 mSolverCounterSat, 2431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5269 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 9177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2431 IncrementalHoareTripleChecker+Valid, 6746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:04,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5269 Valid, 3460 Invalid, 9177 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2431 Valid, 6746 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-14 05:15:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2024-11-14 05:15:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 1911. [2024-11-14 05:15:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1447 states have (on average 1.290946786454734) internal successors, (1868), 1464 states have internal predecessors, (1868), 266 states have call successors, (266), 169 states have call predecessors, (266), 196 states have return successors, (355), 279 states have call predecessors, (355), 263 states have call successors, (355) [2024-11-14 05:15:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2489 transitions. [2024-11-14 05:15:05,128 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2489 transitions. Word has length 124 [2024-11-14 05:15:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:05,129 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 2489 transitions. [2024-11-14 05:15:05,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 05:15:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2489 transitions. [2024-11-14 05:15:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 05:15:05,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:05,142 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:05,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 05:15:05,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:15:05,343 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:05,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1182515242, now seen corresponding path program 1 times [2024-11-14 05:15:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:05,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478112463] [2024-11-14 05:15:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 05:15:05,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478112463] [2024-11-14 05:15:05,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478112463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043195878] [2024-11-14 05:15:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:05,579 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:05,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:15:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:05,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:15:05,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:15:05,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:15:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043195878] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:06,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:15:06,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 05:15:06,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927148955] [2024-11-14 05:15:06,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:06,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:15:06,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:15:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:15:06,164 INFO L87 Difference]: Start difference. First operand 1911 states and 2489 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:15:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:07,437 INFO L93 Difference]: Finished difference Result 2702 states and 3388 transitions. [2024-11-14 05:15:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:15:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-14 05:15:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:07,446 INFO L225 Difference]: With dead ends: 2702 [2024-11-14 05:15:07,446 INFO L226 Difference]: Without dead ends: 1648 [2024-11-14 05:15:07,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:15:07,450 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 682 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:07,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 549 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:15:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2024-11-14 05:15:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1592. [2024-11-14 05:15:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1204 states have (on average 1.303986710963455) internal successors, (1570), 1221 states have internal predecessors, (1570), 227 states have call successors, (227), 136 states have call predecessors, (227), 159 states have return successors, (311), 236 states have call predecessors, (311), 224 states have call successors, (311) [2024-11-14 05:15:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 2108 transitions. [2024-11-14 05:15:07,941 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 2108 transitions. Word has length 125 [2024-11-14 05:15:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:07,941 INFO L471 AbstractCegarLoop]: Abstraction has 1592 states and 2108 transitions. [2024-11-14 05:15:07,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:15:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 2108 transitions. [2024-11-14 05:15:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:15:07,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:07,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:07,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:15:08,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:08,151 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:08,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 863247199, now seen corresponding path program 1 times [2024-11-14 05:15:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:08,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297923098] [2024-11-14 05:15:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:15:08,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297923098] [2024-11-14 05:15:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297923098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090279844] [2024-11-14 05:15:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:08,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:08,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:15:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:08,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:15:08,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:15:08,557 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:15:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090279844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:08,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:15:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:15:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780834463] [2024-11-14 05:15:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:08,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:15:08,559 INFO L87 Difference]: Start difference. First operand 1592 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 05:15:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:09,200 INFO L93 Difference]: Finished difference Result 3096 states and 4529 transitions. [2024-11-14 05:15:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 117 [2024-11-14 05:15:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:09,213 INFO L225 Difference]: With dead ends: 3096 [2024-11-14 05:15:09,213 INFO L226 Difference]: Without dead ends: 2336 [2024-11-14 05:15:09,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 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 05:15:09,218 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 306 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:09,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 478 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2024-11-14 05:15:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2327. [2024-11-14 05:15:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 1822 states have (on average 1.358397365532382) internal successors, (2475), 1842 states have internal predecessors, (2475), 314 states have call successors, (314), 166 states have call predecessors, (314), 189 states have return successors, (444), 320 states have call predecessors, (444), 311 states have call successors, (444) [2024-11-14 05:15:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3233 transitions. [2024-11-14 05:15:09,807 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3233 transitions. Word has length 117 [2024-11-14 05:15:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:09,808 INFO L471 AbstractCegarLoop]: Abstraction has 2327 states and 3233 transitions. [2024-11-14 05:15:09,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 05:15:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3233 transitions. [2024-11-14 05:15:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:15:09,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:09,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:09,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:15:10,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:10,014 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:10,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash -171762147, now seen corresponding path program 1 times [2024-11-14 05:15:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224075542] [2024-11-14 05:15:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:10,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:15:10,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224075542] [2024-11-14 05:15:10,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224075542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273548942] [2024-11-14 05:15:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:10,138 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:10,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:15:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:10,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:15:10,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 05:15:10,410 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:15:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273548942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:15:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:15:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672394816] [2024-11-14 05:15:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:10,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:15:10,412 INFO L87 Difference]: Start difference. First operand 2327 states and 3233 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 05:15:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:11,125 INFO L93 Difference]: Finished difference Result 5286 states and 7969 transitions. [2024-11-14 05:15:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 117 [2024-11-14 05:15:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:11,145 INFO L225 Difference]: With dead ends: 5286 [2024-11-14 05:15:11,145 INFO L226 Difference]: Without dead ends: 3791 [2024-11-14 05:15:11,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 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 05:15:11,154 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 309 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:11,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 478 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2024-11-14 05:15:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 3777. [2024-11-14 05:15:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3043 states have (on average 1.3982911600394348) internal successors, (4255), 3069 states have internal predecessors, (4255), 483 states have call successors, (483), 226 states have call predecessors, (483), 249 states have return successors, (701), 483 states have call predecessors, (701), 480 states have call successors, (701) [2024-11-14 05:15:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 5439 transitions. [2024-11-14 05:15:11,893 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 5439 transitions. Word has length 117 [2024-11-14 05:15:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:11,893 INFO L471 AbstractCegarLoop]: Abstraction has 3777 states and 5439 transitions. [2024-11-14 05:15:11,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 05:15:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 5439 transitions. [2024-11-14 05:15:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:15:11,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:11,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:11,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 05:15:12,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:12,102 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:12,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:12,102 INFO L85 PathProgramCache]: Analyzing trace with hash -564970849, now seen corresponding path program 1 times [2024-11-14 05:15:12,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:12,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892921134] [2024-11-14 05:15:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:12,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:15:12,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:12,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892921134] [2024-11-14 05:15:12,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892921134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:12,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018407731] [2024-11-14 05:15:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:12,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:12,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:12,222 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:12,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:15:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:12,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:15:12,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:15:12,496 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:15:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018407731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:15:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:15:12,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858187088] [2024-11-14 05:15:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:12,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:12,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:15:12,497 INFO L87 Difference]: Start difference. First operand 3777 states and 5439 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 05:15:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:13,376 INFO L93 Difference]: Finished difference Result 9606 states and 14708 transitions. [2024-11-14 05:15:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 117 [2024-11-14 05:15:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:13,407 INFO L225 Difference]: With dead ends: 9606 [2024-11-14 05:15:13,407 INFO L226 Difference]: Without dead ends: 6661 [2024-11-14 05:15:13,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 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 05:15:13,421 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 294 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:13,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 478 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:15:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6661 states. [2024-11-14 05:15:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6661 to 6637. [2024-11-14 05:15:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 5455 states have (on average 1.4216315307057745) internal successors, (7755), 5493 states have internal predecessors, (7755), 811 states have call successors, (811), 346 states have call predecessors, (811), 369 states have return successors, (1197), 799 states have call predecessors, (1197), 808 states have call successors, (1197) [2024-11-14 05:15:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 9763 transitions. [2024-11-14 05:15:14,310 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 9763 transitions. Word has length 117 [2024-11-14 05:15:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:14,311 INFO L471 AbstractCegarLoop]: Abstraction has 6637 states and 9763 transitions. [2024-11-14 05:15:14,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 05:15:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 9763 transitions. [2024-11-14 05:15:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:15:14,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:14,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:14,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:15:14,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:14,523 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:14,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash 116517469, now seen corresponding path program 1 times [2024-11-14 05:15:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712688938] [2024-11-14 05:15:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:15:14,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712688938] [2024-11-14 05:15:14,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712688938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675996187] [2024-11-14 05:15:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:14,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:14,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:15:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:14,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:15:14,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:15:14,939 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:15:14,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675996187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:14,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:15:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:15:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298430966] [2024-11-14 05:15:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:14,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:15:14,941 INFO L87 Difference]: Start difference. First operand 6637 states and 9763 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:15:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:16,380 INFO L93 Difference]: Finished difference Result 18126 states and 27904 transitions. [2024-11-14 05:15:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-14 05:15:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:16,437 INFO L225 Difference]: With dead ends: 18126 [2024-11-14 05:15:16,437 INFO L226 Difference]: Without dead ends: 12321 [2024-11-14 05:15:16,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 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 05:15:16,462 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 300 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:16,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 478 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2024-11-14 05:15:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 12277. [2024-11-14 05:15:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12277 states, 10219 states have (on average 1.432136216850964) internal successors, (14635), 10281 states have internal predecessors, (14635), 1447 states have call successors, (1447), 586 states have call predecessors, (1447), 609 states have return successors, (2153), 1411 states have call predecessors, (2153), 1444 states have call successors, (2153) [2024-11-14 05:15:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12277 states to 12277 states and 18235 transitions. [2024-11-14 05:15:18,124 INFO L78 Accepts]: Start accepts. Automaton has 12277 states and 18235 transitions. Word has length 117 [2024-11-14 05:15:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:18,125 INFO L471 AbstractCegarLoop]: Abstraction has 12277 states and 18235 transitions. [2024-11-14 05:15:18,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:15:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12277 states and 18235 transitions. [2024-11-14 05:15:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:15:18,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:18,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:15:18,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:15:18,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a131a1a-098b-4b86-8d59-6a4c546c0c1c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:18,341 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:18,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1718703003, now seen corresponding path program 1 times [2024-11-14 05:15:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259320565] [2024-11-14 05:15:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 05:15:18,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259320565] [2024-11-14 05:15:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259320565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:18,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:15:18,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:15:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140464467] [2024-11-14 05:15:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:18,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:18,442 INFO L87 Difference]: Start difference. First operand 12277 states and 18235 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:15:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:20,269 INFO L93 Difference]: Finished difference Result 24185 states and 36974 transitions. [2024-11-14 05:15:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2024-11-14 05:15:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:20,341 INFO L225 Difference]: With dead ends: 24185 [2024-11-14 05:15:20,342 INFO L226 Difference]: Without dead ends: 14997 [2024-11-14 05:15:20,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:20,369 INFO L432 NwaCegarLoop]: 394 mSDtfsCounter, 110 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:20,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 683 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2024-11-14 05:15:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14181. [2024-11-14 05:15:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 12059 states have (on average 1.459076208640849) internal successors, (17595), 12121 states have internal predecessors, (17595), 1479 states have call successors, (1479), 618 states have call predecessors, (1479), 641 states have return successors, (2185), 1443 states have call predecessors, (2185), 1476 states have call successors, (2185) [2024-11-14 05:15:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 21259 transitions. [2024-11-14 05:15:22,078 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 21259 transitions. Word has length 117 [2024-11-14 05:15:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:22,078 INFO L471 AbstractCegarLoop]: Abstraction has 14181 states and 21259 transitions. [2024-11-14 05:15:22,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:15:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 21259 transitions. [2024-11-14 05:15:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 05:15:22,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:22,110 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, 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 05:15:22,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 05:15:22,111 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:22,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2049940056, now seen corresponding path program 1 times [2024-11-14 05:15:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:22,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274264922] [2024-11-14 05:15:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:22,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 05:15:22,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:22,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274264922] [2024-11-14 05:15:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274264922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:22,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:15:22,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:15:22,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158887482] [2024-11-14 05:15:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:22,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:22,200 INFO L87 Difference]: Start difference. First operand 14181 states and 21259 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:15:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:25,388 INFO L93 Difference]: Finished difference Result 40526 states and 62580 transitions. [2024-11-14 05:15:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-14 05:15:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:25,507 INFO L225 Difference]: With dead ends: 40526 [2024-11-14 05:15:25,508 INFO L226 Difference]: Without dead ends: 27177 [2024-11-14 05:15:25,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:25,555 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 297 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:25,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 480 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:15:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27177 states. [2024-11-14 05:15:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27177 to 27061. [2024-11-14 05:15:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27061 states, 23163 states have (on average 1.458662522125804) internal successors, (33787), 23273 states have internal predecessors, (33787), 2743 states have call successors, (2743), 1130 states have call predecessors, (2743), 1153 states have return successors, (4057), 2659 states have call predecessors, (4057), 2740 states have call successors, (4057) [2024-11-14 05:15:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27061 states to 27061 states and 40587 transitions. [2024-11-14 05:15:28,491 INFO L78 Accepts]: Start accepts. Automaton has 27061 states and 40587 transitions. Word has length 159 [2024-11-14 05:15:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:28,492 INFO L471 AbstractCegarLoop]: Abstraction has 27061 states and 40587 transitions. [2024-11-14 05:15:28,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:15:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 27061 states and 40587 transitions. [2024-11-14 05:15:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 05:15:28,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:28,532 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, 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 05:15:28,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-14 05:15:28,533 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:28,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash -333653095, now seen corresponding path program 1 times [2024-11-14 05:15:28,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:28,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063144758] [2024-11-14 05:15:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:28,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 05:15:28,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:28,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063144758] [2024-11-14 05:15:28,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063144758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:28,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:15:28,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:15:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690803243] [2024-11-14 05:15:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:28,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:28,625 INFO L87 Difference]: Start difference. First operand 27061 states and 40587 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:15:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:34,735 INFO L93 Difference]: Finished difference Result 78814 states and 121092 transitions. [2024-11-14 05:15:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-14 05:15:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:34,932 INFO L225 Difference]: With dead ends: 78814 [2024-11-14 05:15:34,932 INFO L226 Difference]: Without dead ends: 52585 [2024-11-14 05:15:35,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:35,023 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 299 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:35,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 480 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:15:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52585 states. [2024-11-14 05:15:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52585 to 52357. [2024-11-14 05:15:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52357 states, 44987 states have (on average 1.453819992442261) internal successors, (65403), 45193 states have internal predecessors, (65403), 5191 states have call successors, (5191), 2154 states have call predecessors, (5191), 2177 states have return successors, (7657), 5011 states have call predecessors, (7657), 5188 states have call successors, (7657) [2024-11-14 05:15:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52357 states to 52357 states and 78251 transitions. [2024-11-14 05:15:41,779 INFO L78 Accepts]: Start accepts. Automaton has 52357 states and 78251 transitions. Word has length 159 [2024-11-14 05:15:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:41,779 INFO L471 AbstractCegarLoop]: Abstraction has 52357 states and 78251 transitions. [2024-11-14 05:15:41,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:15:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 52357 states and 78251 transitions. [2024-11-14 05:15:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 05:15:41,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:41,878 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, 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 05:15:41,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-14 05:15:41,878 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:41,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash -291907123, now seen corresponding path program 1 times [2024-11-14 05:15:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:41,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849470088] [2024-11-14 05:15:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-14 05:15:41,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849470088] [2024-11-14 05:15:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849470088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:15:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:15:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:15:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49778458] [2024-11-14 05:15:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:15:41,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:15:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:15:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:41,972 INFO L87 Difference]: Start difference. First operand 52357 states and 78251 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:15:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:50,942 INFO L93 Difference]: Finished difference Result 153998 states and 234996 transitions. [2024-11-14 05:15:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:15:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-14 05:15:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:51,379 INFO L225 Difference]: With dead ends: 153998 [2024-11-14 05:15:51,379 INFO L226 Difference]: Without dead ends: 102473 [2024-11-14 05:15:51,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:15:51,599 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 301 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:51,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 480 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:15:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102473 states.