./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:36:23,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:36:23,548 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:36:23,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:36:23,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:36:23,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:36:23,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:36:23,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:36:23,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:36:23,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:36:23,614 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:36:23,615 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:36:23,617 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:36:23,619 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:36:23,620 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:36:23,620 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:36:23,623 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:36:23,623 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:36:23,624 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:36:23,625 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:36:23,625 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:36:23,626 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:36:23,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:36:23,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:36:23,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:36:23,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:36:23,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:36:23,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:36:23,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:36:23,632 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:36:23,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:36:23,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:36:23,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:36:23,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:36:23,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:36:23,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:36:23,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:36:23,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:36:23,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:36:23,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:36:23,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:36:23,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:36:23,639 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:36:23,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:36:23,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:36:23,640 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:36:23,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:36:23,640 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 [2024-11-09 06:36:24,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:36:24,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:36:24,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:36:24,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:36:24,079 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:36:24,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c Unable to find full path for "g++" [2024-11-09 06:36:26,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:36:27,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:36:27,023 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2024-11-09 06:36:27,043 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/data/82e45d8d2/6bf6eb99f2794f0cb8b12948e08fddce/FLAGd29adb508 [2024-11-09 06:36:27,302 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/data/82e45d8d2/6bf6eb99f2794f0cb8b12948e08fddce [2024-11-09 06:36:27,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:36:27,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:36:27,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:36:27,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:36:27,317 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:36:27,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:36:27" (1/1) ... [2024-11-09 06:36:27,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1241b7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:27, skipping insertion in model container [2024-11-09 06:36:27,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:36:27" (1/1) ... [2024-11-09 06:36:27,383 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:36:27,629 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_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2024-11-09 06:36:27,751 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_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2024-11-09 06:36:27,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:36:27,892 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:36:27,909 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_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2024-11-09 06:36:27,964 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_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2024-11-09 06:36:28,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:36:28,103 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:36:28,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28 WrapperNode [2024-11-09 06:36:28,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:36:28,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:36:28,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:36:28,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:36:28,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,188 INFO L138 Inliner]: procedures = 63, calls = 72, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 636 [2024-11-09 06:36:28,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:36:28,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:36:28,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:36:28,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:36:28,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:36:28,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:36:28,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:36:28,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:36:28,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (1/1) ... [2024-11-09 06:36:28,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:36:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:28,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:36:28,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:36:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:36:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 06:36:28,386 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 06:36:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 06:36:28,386 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 06:36:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 06:36:28,387 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 06:36:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 06:36:28,387 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 06:36:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 06:36:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 06:36:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 06:36:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 06:36:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 06:36:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 06:36:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 06:36:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 06:36:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 06:36:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 06:36:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 06:36:28,392 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 06:36:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 06:36:28,392 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 06:36:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:36:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 06:36:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 06:36:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 06:36:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 06:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:36:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:36:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 06:36:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 06:36:28,549 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:36:28,554 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:36:29,756 INFO L? ?]: Removed 85 outVars from TransFormulas that were not future-live. [2024-11-09 06:36:29,757 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:36:30,349 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:36:30,349 INFO L316 CfgBuilder]: Removed 12 assume(true) statements. [2024-11-09 06:36:30,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:36:30 BoogieIcfgContainer [2024-11-09 06:36:30,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:36:30,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:36:30,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:36:30,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:36:30,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:36:27" (1/3) ... [2024-11-09 06:36:30,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717233e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:36:30, skipping insertion in model container [2024-11-09 06:36:30,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:36:28" (2/3) ... [2024-11-09 06:36:30,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717233e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:36:30, skipping insertion in model container [2024-11-09 06:36:30,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:36:30" (3/3) ... [2024-11-09 06:36:30,364 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2024-11-09 06:36:30,391 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:36:30,392 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 06:36:30,506 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:36:30,517 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;@9f03122, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:36:30,519 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 06:36:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 139 states have (on average 1.4892086330935252) internal successors, (207), 145 states have internal predecessors, (207), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-09 06:36:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 06:36:30,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:30,544 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] [2024-11-09 06:36:30,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:30,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash 937638284, now seen corresponding path program 1 times [2024-11-09 06:36:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:30,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437857189] [2024-11-09 06:36:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:30,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:31,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437857189] [2024-11-09 06:36:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437857189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:31,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:31,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:36:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866497078] [2024-11-09 06:36:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:31,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:36:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:36:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:36:31,594 INFO L87 Difference]: Start difference. First operand has 189 states, 139 states have (on average 1.4892086330935252) internal successors, (207), 145 states have internal predecessors, (207), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) 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) [2024-11-09 06:36:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:33,055 INFO L93 Difference]: Finished difference Result 435 states and 614 transitions. [2024-11-09 06:36:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:36:33,060 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 [2024-11-09 06:36:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:33,087 INFO L225 Difference]: With dead ends: 435 [2024-11-09 06:36:33,088 INFO L226 Difference]: Without dead ends: 249 [2024-11-09 06:36:33,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 06:36:33,105 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 408 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:33,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 804 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:36:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-09 06:36:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2024-11-09 06:36:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 173 states have (on average 1.3988439306358382) internal successors, (242), 177 states have internal predecessors, (242), 41 states have call successors, (41), 21 states have call predecessors, (41), 20 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 06:36:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 322 transitions. [2024-11-09 06:36:33,238 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 322 transitions. Word has length 45 [2024-11-09 06:36:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:33,239 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 322 transitions. [2024-11-09 06:36:33,240 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) [2024-11-09 06:36:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 322 transitions. [2024-11-09 06:36:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:36:33,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:33,245 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] [2024-11-09 06:36:33,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:36:33,246 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:33,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1294992963, now seen corresponding path program 1 times [2024-11-09 06:36:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:33,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000684251] [2024-11-09 06:36:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:33,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000684251] [2024-11-09 06:36:33,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000684251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:33,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:33,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:36:33,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144982292] [2024-11-09 06:36:33,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:33,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:36:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:36:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:36:33,392 INFO L87 Difference]: Start difference. First operand 236 states and 322 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) [2024-11-09 06:36:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:33,568 INFO L93 Difference]: Finished difference Result 461 states and 609 transitions. [2024-11-09 06:36:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:36:33,569 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 [2024-11-09 06:36:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:33,573 INFO L225 Difference]: With dead ends: 461 [2024-11-09 06:36:33,574 INFO L226 Difference]: Without dead ends: 345 [2024-11-09 06:36:33,575 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 [2024-11-09 06:36:33,577 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 233 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:33,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 278 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-09 06:36:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 331. [2024-11-09 06:36:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 238 states have (on average 1.3529411764705883) internal successors, (322), 242 states have internal predecessors, (322), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-09 06:36:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 434 transitions. [2024-11-09 06:36:33,693 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 434 transitions. Word has length 46 [2024-11-09 06:36:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:33,695 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 434 transitions. [2024-11-09 06:36:33,695 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) [2024-11-09 06:36:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 434 transitions. [2024-11-09 06:36:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 06:36:33,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:33,703 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] [2024-11-09 06:36:33,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:36:33,704 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:33,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -571100210, now seen corresponding path program 1 times [2024-11-09 06:36:33,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:33,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889153403] [2024-11-09 06:36:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:33,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:33,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889153403] [2024-11-09 06:36:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889153403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:33,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:36:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130020436] [2024-11-09 06:36:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:33,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:36:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:36:33,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:36:33,824 INFO L87 Difference]: Start difference. First operand 331 states and 434 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) [2024-11-09 06:36:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:34,059 INFO L93 Difference]: Finished difference Result 695 states and 882 transitions. [2024-11-09 06:36:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:36:34,060 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 [2024-11-09 06:36:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:34,065 INFO L225 Difference]: With dead ends: 695 [2024-11-09 06:36:34,065 INFO L226 Difference]: Without dead ends: 485 [2024-11-09 06:36:34,067 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 [2024-11-09 06:36:34,069 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 68 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:34,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 412 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-11-09 06:36:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 481. [2024-11-09 06:36:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 343 states have (on average 1.3323615160349853) internal successors, (457), 347 states have internal predecessors, (457), 81 states have call successors, (81), 56 states have call predecessors, (81), 55 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-11-09 06:36:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 617 transitions. [2024-11-09 06:36:34,127 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 617 transitions. Word has length 47 [2024-11-09 06:36:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:34,128 INFO L471 AbstractCegarLoop]: Abstraction has 481 states and 617 transitions. [2024-11-09 06:36:34,129 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) [2024-11-09 06:36:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 617 transitions. [2024-11-09 06:36:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:36:34,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:34,132 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] [2024-11-09 06:36:34,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:36:34,132 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:34,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 159772374, now seen corresponding path program 1 times [2024-11-09 06:36:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456845499] [2024-11-09 06:36:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:34,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456845499] [2024-11-09 06:36:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456845499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:34,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:34,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:36:34,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820495548] [2024-11-09 06:36:34,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:34,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:36:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:36:34,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:36:34,272 INFO L87 Difference]: Start difference. First operand 481 states and 617 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:36:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:35,315 INFO L93 Difference]: Finished difference Result 1004 states and 1427 transitions. [2024-11-09 06:36:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:36:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-11-09 06:36:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:35,324 INFO L225 Difference]: With dead ends: 1004 [2024-11-09 06:36:35,324 INFO L226 Difference]: Without dead ends: 894 [2024-11-09 06:36:35,326 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 [2024-11-09 06:36:35,328 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 828 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:35,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 790 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:36:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2024-11-09 06:36:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 883. [2024-11-09 06:36:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 664 states have (on average 1.3780120481927711) internal successors, (915), 671 states have internal predecessors, (915), 138 states have call successors, (138), 80 states have call predecessors, (138), 79 states have return successors, (170), 133 states have call predecessors, (170), 136 states have call successors, (170) [2024-11-09 06:36:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1223 transitions. [2024-11-09 06:36:35,441 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1223 transitions. Word has length 46 [2024-11-09 06:36:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:35,442 INFO L471 AbstractCegarLoop]: Abstraction has 883 states and 1223 transitions. [2024-11-09 06:36:35,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:36:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1223 transitions. [2024-11-09 06:36:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 06:36:35,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:35,446 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] [2024-11-09 06:36:35,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:36:35,446 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:35,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash -441256564, now seen corresponding path program 1 times [2024-11-09 06:36:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:35,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685455508] [2024-11-09 06:36:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:35,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685455508] [2024-11-09 06:36:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685455508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:36:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215728982] [2024-11-09 06:36:35,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:35,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:36:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:36:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:36:35,508 INFO L87 Difference]: Start difference. First operand 883 states and 1223 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) [2024-11-09 06:36:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:35,707 INFO L93 Difference]: Finished difference Result 1307 states and 1745 transitions. [2024-11-09 06:36:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:36:35,707 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 [2024-11-09 06:36:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:35,719 INFO L225 Difference]: With dead ends: 1307 [2024-11-09 06:36:35,719 INFO L226 Difference]: Without dead ends: 946 [2024-11-09 06:36:35,721 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 [2024-11-09 06:36:35,726 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 233 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:35,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 285 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:36:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2024-11-09 06:36:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 934. [2024-11-09 06:36:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 700 states have (on average 1.3671428571428572) internal successors, (957), 707 states have internal predecessors, (957), 146 states have call successors, (146), 87 states have call predecessors, (146), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2024-11-09 06:36:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1281 transitions. [2024-11-09 06:36:35,887 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1281 transitions. Word has length 53 [2024-11-09 06:36:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:35,888 INFO L471 AbstractCegarLoop]: Abstraction has 934 states and 1281 transitions. [2024-11-09 06:36:35,891 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) [2024-11-09 06:36:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1281 transitions. [2024-11-09 06:36:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 06:36:35,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:35,894 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] [2024-11-09 06:36:35,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:36:35,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:35,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1930513982, now seen corresponding path program 1 times [2024-11-09 06:36:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491618603] [2024-11-09 06:36:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:36,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491618603] [2024-11-09 06:36:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491618603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:36,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:36:36,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:36:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165931093] [2024-11-09 06:36:36,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:36,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:36:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:36:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:36:36,059 INFO L87 Difference]: Start difference. First operand 934 states and 1281 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) [2024-11-09 06:36:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:36,476 INFO L93 Difference]: Finished difference Result 1043 states and 1413 transitions. [2024-11-09 06:36:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:36:36,477 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 [2024-11-09 06:36:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:36,485 INFO L225 Difference]: With dead ends: 1043 [2024-11-09 06:36:36,485 INFO L226 Difference]: Without dead ends: 1040 [2024-11-09 06:36:36,486 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 [2024-11-09 06:36:36,488 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 424 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:36,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 264 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:36:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2024-11-09 06:36:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 933. [2024-11-09 06:36:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 700 states have (on average 1.3628571428571428) internal successors, (954), 706 states have internal predecessors, (954), 145 states have call successors, (145), 87 states have call predecessors, (145), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2024-11-09 06:36:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1277 transitions. [2024-11-09 06:36:36,618 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1277 transitions. Word has length 54 [2024-11-09 06:36:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:36,619 INFO L471 AbstractCegarLoop]: Abstraction has 933 states and 1277 transitions. [2024-11-09 06:36:36,620 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) [2024-11-09 06:36:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1277 transitions. [2024-11-09 06:36:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 06:36:36,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:36,622 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] [2024-11-09 06:36:36,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:36:36,622 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:36,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:36,623 INFO L85 PathProgramCache]: Analyzing trace with hash 282690454, now seen corresponding path program 1 times [2024-11-09 06:36:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:36,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678170289] [2024-11-09 06:36:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:36,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:36,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678170289] [2024-11-09 06:36:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678170289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030107917] [2024-11-09 06:36:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:36,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:36,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:36:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:37,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:36:37,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:37,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:36:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030107917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:37,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732086216] [2024-11-09 06:36:37,597 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 06:36:37,598 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:37,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:37,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:37,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:43,328 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 141 for LOIs [2024-11-09 06:36:43,393 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 137 for LOIs [2024-11-09 06:36:43,470 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 145 for LOIs [2024-11-09 06:36:44,536 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 141 for LOIs [2024-11-09 06:36:44,716 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 141 for LOIs [2024-11-09 06:36:44,895 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 141 for LOIs [2024-11-09 06:36:44,961 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 148 for LOIs [2024-11-09 06:36:45,018 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:59,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1732086216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:36:59,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 06:36:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664763996] [2024-11-09 06:36:59,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:36:59,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:36:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:36:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:36:59,783 INFO L87 Difference]: Start difference. First operand 933 states and 1277 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) [2024-11-09 06:37:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:12,425 INFO L93 Difference]: Finished difference Result 1370 states and 1806 transitions. [2024-11-09 06:37:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:37:12,426 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 [2024-11-09 06:37:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:12,436 INFO L225 Difference]: With dead ends: 1370 [2024-11-09 06:37:12,436 INFO L226 Difference]: Without dead ends: 960 [2024-11-09 06:37:12,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 06:37:12,441 INFO L432 NwaCegarLoop]: 200 mSDtfsCounter, 107 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:12,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 1060 Invalid, 1916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [83 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 06:37:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2024-11-09 06:37:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 952. [2024-11-09 06:37:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 717 states have (on average 1.3584379358437937) internal successors, (974), 723 states have internal predecessors, (974), 146 states have call successors, (146), 88 states have call predecessors, (146), 87 states have return successors, (179), 142 states have call predecessors, (179), 145 states have call successors, (179) [2024-11-09 06:37:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1299 transitions. [2024-11-09 06:37:12,606 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1299 transitions. Word has length 55 [2024-11-09 06:37:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:12,607 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1299 transitions. [2024-11-09 06:37:12,607 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) [2024-11-09 06:37:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1299 transitions. [2024-11-09 06:37:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 06:37:12,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:12,611 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] [2024-11-09 06:37:12,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:37:12,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 06:37:12,816 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:12,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1197652514, now seen corresponding path program 1 times [2024-11-09 06:37:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:12,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440729442] [2024-11-09 06:37:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:37:12,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440729442] [2024-11-09 06:37:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440729442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:12,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:37:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:37:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380393269] [2024-11-09 06:37:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:12,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:37:12,909 INFO L87 Difference]: Start difference. First operand 952 states and 1299 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) [2024-11-09 06:37:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:13,174 INFO L93 Difference]: Finished difference Result 1403 states and 1855 transitions. [2024-11-09 06:37:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:13,175 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 [2024-11-09 06:37:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:13,183 INFO L225 Difference]: With dead ends: 1403 [2024-11-09 06:37:13,184 INFO L226 Difference]: Without dead ends: 1135 [2024-11-09 06:37:13,186 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 [2024-11-09 06:37:13,187 INFO L432 NwaCegarLoop]: 247 mSDtfsCounter, 44 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:13,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 457 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2024-11-09 06:37:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1006. [2024-11-09 06:37:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 761 states have (on average 1.3574244415243102) internal successors, (1033), 767 states have internal predecessors, (1033), 151 states have call successors, (151), 93 states have call predecessors, (151), 92 states have return successors, (184), 147 states have call predecessors, (184), 150 states have call successors, (184) [2024-11-09 06:37:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1368 transitions. [2024-11-09 06:37:13,338 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1368 transitions. Word has length 61 [2024-11-09 06:37:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:13,339 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1368 transitions. [2024-11-09 06:37:13,339 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) [2024-11-09 06:37:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1368 transitions. [2024-11-09 06:37:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:37:13,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:13,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:13,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:37:13,344 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:13,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1702828843, now seen corresponding path program 1 times [2024-11-09 06:37:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167352729] [2024-11-09 06:37:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:37:13,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167352729] [2024-11-09 06:37:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167352729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299372201] [2024-11-09 06:37:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:13,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:13,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:37:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:13,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:37:13,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:37:13,784 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:37:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299372201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:37:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378882277] [2024-11-09 06:37:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:13,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:37:13,789 INFO L87 Difference]: Start difference. First operand 1006 states and 1368 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:37:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:14,087 INFO L93 Difference]: Finished difference Result 2014 states and 2933 transitions. [2024-11-09 06:37:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2024-11-09 06:37:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:14,097 INFO L225 Difference]: With dead ends: 2014 [2024-11-09 06:37:14,097 INFO L226 Difference]: Without dead ends: 1502 [2024-11-09 06:37:14,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:37:14,101 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 227 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:14,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 343 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2024-11-09 06:37:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1495. [2024-11-09 06:37:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1153 states have (on average 1.375542064180399) internal successors, (1586), 1162 states have internal predecessors, (1586), 218 states have call successors, (218), 123 states have call predecessors, (218), 122 states have return successors, (281), 211 states have call predecessors, (281), 217 states have call successors, (281) [2024-11-09 06:37:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2085 transitions. [2024-11-09 06:37:14,270 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2085 transitions. Word has length 88 [2024-11-09 06:37:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:14,270 INFO L471 AbstractCegarLoop]: Abstraction has 1495 states and 2085 transitions. [2024-11-09 06:37:14,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:37:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2085 transitions. [2024-11-09 06:37:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:37:14,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:14,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:14,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:37:14,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 06:37:14,476 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:14,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 164649193, now seen corresponding path program 1 times [2024-11-09 06:37:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:14,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701421749] [2024-11-09 06:37:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:37:14,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701421749] [2024-11-09 06:37:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701421749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359079185] [2024-11-09 06:37:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:14,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:14,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:14,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:14,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:37:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:14,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:37:14,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:37:14,821 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:37:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359079185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:14,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:14,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:37:14,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595036550] [2024-11-09 06:37:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:14,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:14,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:37:14,826 INFO L87 Difference]: Start difference. First operand 1495 states and 2085 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:37:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:15,194 INFO L93 Difference]: Finished difference Result 3466 states and 5113 transitions. [2024-11-09 06:37:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2024-11-09 06:37:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:15,213 INFO L225 Difference]: With dead ends: 3466 [2024-11-09 06:37:15,214 INFO L226 Difference]: Without dead ends: 2465 [2024-11-09 06:37:15,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:37:15,225 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:15,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 343 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2024-11-09 06:37:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2453. [2024-11-09 06:37:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1922 states have (on average 1.385015608740895) internal successors, (2662), 1937 states have internal predecessors, (2662), 347 states have call successors, (347), 183 states have call predecessors, (347), 182 states have return successors, (466), 334 states have call predecessors, (466), 346 states have call successors, (466) [2024-11-09 06:37:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3475 transitions. [2024-11-09 06:37:15,529 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3475 transitions. Word has length 88 [2024-11-09 06:37:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:15,530 INFO L471 AbstractCegarLoop]: Abstraction has 2453 states and 3475 transitions. [2024-11-09 06:37:15,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:37:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3475 transitions. [2024-11-09 06:37:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:37:15,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:15,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:15,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:37:15,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:15,737 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:15,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash -429382677, now seen corresponding path program 1 times [2024-11-09 06:37:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548704602] [2024-11-09 06:37:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:37:15,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548704602] [2024-11-09 06:37:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548704602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:37:15,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:37:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704275211] [2024-11-09 06:37:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:15,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:37:15,842 INFO L87 Difference]: Start difference. First operand 2453 states and 3475 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:37:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:16,239 INFO L93 Difference]: Finished difference Result 4495 states and 6588 transitions. [2024-11-09 06:37:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2024-11-09 06:37:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:16,262 INFO L225 Difference]: With dead ends: 4495 [2024-11-09 06:37:16,263 INFO L226 Difference]: Without dead ends: 2925 [2024-11-09 06:37:16,271 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 [2024-11-09 06:37:16,272 INFO L432 NwaCegarLoop]: 286 mSDtfsCounter, 70 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:16,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 503 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2024-11-09 06:37:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2745. [2024-11-09 06:37:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2198 states have (on average 1.4094631483166515) internal successors, (3098), 2213 states have internal predecessors, (3098), 355 states have call successors, (355), 191 states have call predecessors, (355), 190 states have return successors, (474), 342 states have call predecessors, (474), 354 states have call successors, (474) [2024-11-09 06:37:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3927 transitions. [2024-11-09 06:37:16,617 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3927 transitions. Word has length 88 [2024-11-09 06:37:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:16,618 INFO L471 AbstractCegarLoop]: Abstraction has 2745 states and 3927 transitions. [2024-11-09 06:37:16,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:37:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3927 transitions. [2024-11-09 06:37:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 06:37:16,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:16,625 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] [2024-11-09 06:37:16,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:37:16,628 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:16,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1545482475, now seen corresponding path program 1 times [2024-11-09 06:37:16,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:16,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852299125] [2024-11-09 06:37:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:16,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:37:17,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852299125] [2024-11-09 06:37:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852299125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:17,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593735133] [2024-11-09 06:37:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:17,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:17,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:17,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:37:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:17,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:37:17,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:37:17,367 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:37:17,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593735133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:17,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:17,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2024-11-09 06:37:17,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979656947] [2024-11-09 06:37:17,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:17,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:37:17,373 INFO L87 Difference]: Start difference. First operand 2745 states and 3927 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) [2024-11-09 06:37:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:17,739 INFO L93 Difference]: Finished difference Result 3082 states and 4352 transitions. [2024-11-09 06:37:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:17,740 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 [2024-11-09 06:37:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:17,756 INFO L225 Difference]: With dead ends: 3082 [2024-11-09 06:37:17,756 INFO L226 Difference]: Without dead ends: 2760 [2024-11-09 06:37:17,759 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 [2024-11-09 06:37:17,760 INFO L432 NwaCegarLoop]: 252 mSDtfsCounter, 47 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:17,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 458 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2024-11-09 06:37:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2741. [2024-11-09 06:37:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2194 states have (on average 1.4033728350045578) internal successors, (3079), 2209 states have internal predecessors, (3079), 355 states have call successors, (355), 191 states have call predecessors, (355), 190 states have return successors, (474), 342 states have call predecessors, (474), 354 states have call successors, (474) [2024-11-09 06:37:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3908 transitions. [2024-11-09 06:37:18,065 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3908 transitions. Word has length 102 [2024-11-09 06:37:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:18,066 INFO L471 AbstractCegarLoop]: Abstraction has 2741 states and 3908 transitions. [2024-11-09 06:37:18,066 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) [2024-11-09 06:37:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3908 transitions. [2024-11-09 06:37:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 06:37:18,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:18,072 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] [2024-11-09 06:37:18,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:37:18,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:18,274 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:18,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 31075284, now seen corresponding path program 1 times [2024-11-09 06:37:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105067217] [2024-11-09 06:37:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:37:18,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:18,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105067217] [2024-11-09 06:37:18,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105067217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:18,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067860640] [2024-11-09 06:37:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:18,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:18,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:18,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:18,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:37:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:18,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:37:18,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:37:18,962 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:37:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067860640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:18,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:18,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 06:37:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595545066] [2024-11-09 06:37:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:18,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:37:18,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:37:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:37:18,965 INFO L87 Difference]: Start difference. First operand 2741 states and 3908 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) [2024-11-09 06:37:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:19,499 INFO L93 Difference]: Finished difference Result 3078 states and 4313 transitions. [2024-11-09 06:37:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:37:19,499 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 [2024-11-09 06:37:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:19,518 INFO L225 Difference]: With dead ends: 3078 [2024-11-09 06:37:19,518 INFO L226 Difference]: Without dead ends: 2599 [2024-11-09 06:37:19,521 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 [2024-11-09 06:37:19,522 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 183 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:19,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 917 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:37:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2024-11-09 06:37:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2595. [2024-11-09 06:37:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2099 states have (on average 1.4121010004764174) internal successors, (2964), 2114 states have internal predecessors, (2964), 327 states have call successors, (327), 168 states have call predecessors, (327), 167 states have return successors, (446), 314 states have call predecessors, (446), 326 states have call successors, (446) [2024-11-09 06:37:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 3737 transitions. [2024-11-09 06:37:19,853 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 3737 transitions. Word has length 102 [2024-11-09 06:37:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:19,853 INFO L471 AbstractCegarLoop]: Abstraction has 2595 states and 3737 transitions. [2024-11-09 06:37:19,854 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) [2024-11-09 06:37:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 3737 transitions. [2024-11-09 06:37:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 06:37:19,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:19,864 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] [2024-11-09 06:37:19,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:37:20,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:37:20,068 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:20,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1196042843, now seen corresponding path program 1 times [2024-11-09 06:37:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268108069] [2024-11-09 06:37:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:37:20,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:20,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268108069] [2024-11-09 06:37:20,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268108069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345510191] [2024-11-09 06:37:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:20,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:20,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:37:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:20,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:37:20,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:37:20,551 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:37:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345510191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:37:20,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:37:20,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 06:37:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035596233] [2024-11-09 06:37:20,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:37:20,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:37:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:37:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:37:20,554 INFO L87 Difference]: Start difference. First operand 2595 states and 3737 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) [2024-11-09 06:37:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:20,910 INFO L93 Difference]: Finished difference Result 2842 states and 4045 transitions. [2024-11-09 06:37:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:37:20,911 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 [2024-11-09 06:37:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:20,932 INFO L225 Difference]: With dead ends: 2842 [2024-11-09 06:37:20,932 INFO L226 Difference]: Without dead ends: 2596 [2024-11-09 06:37:20,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:37:20,936 INFO L432 NwaCegarLoop]: 245 mSDtfsCounter, 53 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:20,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 437 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:37:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2024-11-09 06:37:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2518. [2024-11-09 06:37:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2043 states have (on average 1.4111600587371513) internal successors, (2883), 2058 states have internal predecessors, (2883), 316 states have call successors, (316), 158 states have call predecessors, (316), 157 states have return successors, (435), 303 states have call predecessors, (435), 315 states have call successors, (435) [2024-11-09 06:37:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3634 transitions. [2024-11-09 06:37:21,265 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3634 transitions. Word has length 104 [2024-11-09 06:37:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:21,266 INFO L471 AbstractCegarLoop]: Abstraction has 2518 states and 3634 transitions. [2024-11-09 06:37:21,266 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) [2024-11-09 06:37:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3634 transitions. [2024-11-09 06:37:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 06:37:21,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:21,281 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] [2024-11-09 06:37:21,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:37:21,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:37:21,482 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:21,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 796051644, now seen corresponding path program 1 times [2024-11-09 06:37:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:21,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134177401] [2024-11-09 06:37:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:37:21,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:37:21,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134177401] [2024-11-09 06:37:21,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134177401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:37:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549581516] [2024-11-09 06:37:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:37:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:37:21,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:37:21,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:37:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:37:21,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:37:21,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:37:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:37:22,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 06:37:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549581516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:22,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687505814] [2024-11-09 06:37:22,668 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 06:37:22,668 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:22,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:22,669 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:22,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:38,748 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 179 for LOIs [2024-11-09 06:37:39,043 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2024-11-09 06:37:39,300 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2024-11-09 06:37:39,334 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 164 for LOIs [2024-11-09 06:37:41,205 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2024-11-09 06:37:42,905 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 114 for LOIs [2024-11-09 06:37:43,036 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 158 for LOIs [2024-11-09 06:37:43,286 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 169 for LOIs [2024-11-09 06:37:43,553 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:38:19,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66781#(and (= ~q_req_up~0 1) (= ~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) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= ~p_dw_pc~0 1) (= ~T4_E~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) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_st~0 1))' at error location [2024-11-09 06:38:19,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:38:19,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:38:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 06:38:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779279938] [2024-11-09 06:38:19,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:38:19,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:38:19,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:38:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:38:19,184 INFO L87 Difference]: Start difference. First operand 2518 states and 3634 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) [2024-11-09 06:38:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:23,307 INFO L93 Difference]: Finished difference Result 3458 states and 4721 transitions. [2024-11-09 06:38:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 06:38:23,308 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 [2024-11-09 06:38:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:23,330 INFO L225 Difference]: With dead ends: 3458 [2024-11-09 06:38:23,330 INFO L226 Difference]: Without dead ends: 3276 [2024-11-09 06:38:23,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 06:38:23,339 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 968 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:23,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1421 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:38:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2024-11-09 06:38:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2913. [2024-11-09 06:38:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2328 states have (on average 1.3823024054982818) internal successors, (3218), 2343 states have internal predecessors, (3218), 374 states have call successors, (374), 210 states have call predecessors, (374), 209 states have return successors, (493), 361 states have call predecessors, (493), 373 states have call successors, (493) [2024-11-09 06:38:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4085 transitions. [2024-11-09 06:38:23,739 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4085 transitions. Word has length 104 [2024-11-09 06:38:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:23,740 INFO L471 AbstractCegarLoop]: Abstraction has 2913 states and 4085 transitions. [2024-11-09 06:38:23,741 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) [2024-11-09 06:38:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4085 transitions. [2024-11-09 06:38:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 06:38:23,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:23,748 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] [2024-11-09 06:38:23,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:38:23,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:38:23,950 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:23,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1549552628, now seen corresponding path program 1 times [2024-11-09 06:38:23,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:23,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097476717] [2024-11-09 06:38:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:38:24,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097476717] [2024-11-09 06:38:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097476717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:38:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:38:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796534218] [2024-11-09 06:38:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:24,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:38:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:38:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:38:24,033 INFO L87 Difference]: Start difference. First operand 2913 states and 4085 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) [2024-11-09 06:38:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:24,486 INFO L93 Difference]: Finished difference Result 3412 states and 4657 transitions. [2024-11-09 06:38:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:38:24,487 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 [2024-11-09 06:38:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:24,506 INFO L225 Difference]: With dead ends: 3412 [2024-11-09 06:38:24,506 INFO L226 Difference]: Without dead ends: 2903 [2024-11-09 06:38:24,509 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 [2024-11-09 06:38:24,510 INFO L432 NwaCegarLoop]: 249 mSDtfsCounter, 229 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:24,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 315 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:38:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2024-11-09 06:38:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2894. [2024-11-09 06:38:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2311 states have (on average 1.378623972306361) internal successors, (3186), 2326 states have internal predecessors, (3186), 373 states have call successors, (373), 209 states have call predecessors, (373), 208 states have return successors, (492), 360 states have call predecessors, (492), 372 states have call successors, (492) [2024-11-09 06:38:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 4051 transitions. [2024-11-09 06:38:24,814 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 4051 transitions. Word has length 108 [2024-11-09 06:38:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:24,815 INFO L471 AbstractCegarLoop]: Abstraction has 2894 states and 4051 transitions. [2024-11-09 06:38:24,815 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) [2024-11-09 06:38:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 4051 transitions. [2024-11-09 06:38:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 06:38:24,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:24,824 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] [2024-11-09 06:38:24,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 06:38:24,824 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:24,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 197877334, now seen corresponding path program 1 times [2024-11-09 06:38:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:24,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003577599] [2024-11-09 06:38:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:24,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 06:38:25,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003577599] [2024-11-09 06:38:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003577599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191974799] [2024-11-09 06:38:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:25,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:25,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:25,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:38:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:25,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:38:25,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:38:25,301 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:38:25,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191974799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:25,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:38:25,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 06:38:25,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021098883] [2024-11-09 06:38:25,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:25,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:38:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:38:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 06:38:25,304 INFO L87 Difference]: Start difference. First operand 2894 states and 4051 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) [2024-11-09 06:38:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:25,956 INFO L93 Difference]: Finished difference Result 3414 states and 4645 transitions. [2024-11-09 06:38:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:38:25,956 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 [2024-11-09 06:38:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:25,974 INFO L225 Difference]: With dead ends: 3414 [2024-11-09 06:38:25,975 INFO L226 Difference]: Without dead ends: 2865 [2024-11-09 06:38:25,978 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 [2024-11-09 06:38:25,979 INFO L432 NwaCegarLoop]: 238 mSDtfsCounter, 44 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:25,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1132 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:38:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2024-11-09 06:38:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2805. [2024-11-09 06:38:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2250 states have (on average 1.3848888888888888) internal successors, (3116), 2265 states have internal predecessors, (3116), 358 states have call successors, (358), 196 states have call predecessors, (358), 195 states have return successors, (477), 345 states have call predecessors, (477), 357 states have call successors, (477) [2024-11-09 06:38:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 3951 transitions. [2024-11-09 06:38:26,415 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 3951 transitions. Word has length 112 [2024-11-09 06:38:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:26,416 INFO L471 AbstractCegarLoop]: Abstraction has 2805 states and 3951 transitions. [2024-11-09 06:38:26,416 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) [2024-11-09 06:38:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 3951 transitions. [2024-11-09 06:38:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 06:38:26,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:26,424 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] [2024-11-09 06:38:26,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:38:26,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:38:26,629 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:26,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 109117604, now seen corresponding path program 1 times [2024-11-09 06:38:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213503235] [2024-11-09 06:38:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:26,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 06:38:26,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213503235] [2024-11-09 06:38:26,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213503235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:38:26,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:38:26,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:38:26,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132088348] [2024-11-09 06:38:26,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:38:26,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:38:26,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:38:26,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:38:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:38:26,800 INFO L87 Difference]: Start difference. First operand 2805 states and 3951 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) [2024-11-09 06:38:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:27,292 INFO L93 Difference]: Finished difference Result 3554 states and 4796 transitions. [2024-11-09 06:38:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:38:27,293 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 [2024-11-09 06:38:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:27,312 INFO L225 Difference]: With dead ends: 3554 [2024-11-09 06:38:27,312 INFO L226 Difference]: Without dead ends: 3097 [2024-11-09 06:38:27,315 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 [2024-11-09 06:38:27,316 INFO L432 NwaCegarLoop]: 243 mSDtfsCounter, 218 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:27,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1032 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:38:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2024-11-09 06:38:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3063. [2024-11-09 06:38:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2412 states have (on average 1.3665008291873963) internal successors, (3296), 2433 states have internal predecessors, (3296), 406 states have call successors, (406), 238 states have call predecessors, (406), 243 states have return successors, (537), 393 states have call predecessors, (537), 405 states have call successors, (537) [2024-11-09 06:38:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4239 transitions. [2024-11-09 06:38:27,662 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4239 transitions. Word has length 113 [2024-11-09 06:38:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:27,663 INFO L471 AbstractCegarLoop]: Abstraction has 3063 states and 4239 transitions. [2024-11-09 06:38:27,663 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) [2024-11-09 06:38:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4239 transitions. [2024-11-09 06:38:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 06:38:27,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:27,672 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] [2024-11-09 06:38:27,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 06:38:27,672 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:27,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1478043293, now seen corresponding path program 1 times [2024-11-09 06:38:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:27,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039159571] [2024-11-09 06:38:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:38:28,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:38:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039159571] [2024-11-09 06:38:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039159571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:38:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510999899] [2024-11-09 06:38:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:38:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:38:28,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:38:28,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:38:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:38:28,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 06:38:28,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:38:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:38:29,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:38:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:38:32,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510999899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:38:32,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437298899] [2024-11-09 06:38:32,269 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 06:38:32,269 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:38:32,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:38:32,270 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:38:32,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:02,405 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 190 for LOIs [2024-11-09 06:39:02,661 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 06:39:02,663 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 06:39:02,668 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 154 for LOIs [2024-11-09 06:39:03,599 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2024-11-09 06:39:04,426 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 06:39:04,459 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 148 for LOIs [2024-11-09 06:39:04,612 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 159 for LOIs [2024-11-09 06:39:04,775 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:39:21,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102541#(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 [2024-11-09 06:39:21,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:39:21,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:39:21,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 50 [2024-11-09 06:39:21,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375786055] [2024-11-09 06:39:21,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:39:21,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 06:39:21,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 06:39:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=9264, Unknown=0, NotChecked=0, Total=10100 [2024-11-09 06:39:21,289 INFO L87 Difference]: Start difference. First operand 3063 states and 4239 transitions. Second operand has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-09 06:39:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:33,051 INFO L93 Difference]: Finished difference Result 5186 states and 6811 transitions. [2024-11-09 06:39:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-09 06:39:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) Word has length 114 [2024-11-09 06:39:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:33,074 INFO L225 Difference]: With dead ends: 5186 [2024-11-09 06:39:33,074 INFO L226 Difference]: Without dead ends: 4471 [2024-11-09 06:39:33,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 10 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18790 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=5885, Invalid=44067, Unknown=0, NotChecked=0, Total=49952 [2024-11-09 06:39:33,094 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 3710 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 1872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3710 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 6036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1872 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:33,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3710 Valid, 2857 Invalid, 6036 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1872 Valid, 4164 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 06:39:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2024-11-09 06:39:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 3063. [2024-11-09 06:39:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2412 states have (on average 1.364842454394693) internal successors, (3292), 2433 states have internal predecessors, (3292), 406 states have call successors, (406), 238 states have call predecessors, (406), 243 states have return successors, (537), 393 states have call predecessors, (537), 405 states have call successors, (537) [2024-11-09 06:39:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4235 transitions. [2024-11-09 06:39:33,772 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4235 transitions. Word has length 114 [2024-11-09 06:39:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:33,772 INFO L471 AbstractCegarLoop]: Abstraction has 3063 states and 4235 transitions. [2024-11-09 06:39:33,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-09 06:39:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4235 transitions. [2024-11-09 06:39:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 06:39:33,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:33,782 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] [2024-11-09 06:39:33,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:39:33,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:33,987 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:33,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash -248801677, now seen corresponding path program 1 times [2024-11-09 06:39:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:33,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163933446] [2024-11-09 06:39:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:39:34,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163933446] [2024-11-09 06:39:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163933446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872572903] [2024-11-09 06:39:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:34,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:34,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:34,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:39:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:34,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 06:39:34,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 06:39:34,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:39:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872572903] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:35,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:39:35,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 06:39:35,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091880480] [2024-11-09 06:39:35,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:39:35,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:39:35,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:39:35,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 06:39:35,032 INFO L87 Difference]: Start difference. First operand 3063 states and 4235 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) [2024-11-09 06:39:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:36,224 INFO L93 Difference]: Finished difference Result 3935 states and 5244 transitions. [2024-11-09 06:39:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:39:36,225 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 [2024-11-09 06:39:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:36,242 INFO L225 Difference]: With dead ends: 3935 [2024-11-09 06:39:36,242 INFO L226 Difference]: Without dead ends: 3220 [2024-11-09 06:39:36,247 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 [2024-11-09 06:39:36,247 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 325 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:36,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 687 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:39:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2024-11-09 06:39:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3042. [2024-11-09 06:39:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 2384 states have (on average 1.3661912751677852) internal successors, (3257), 2408 states have internal predecessors, (3257), 409 states have call successors, (409), 235 states have call predecessors, (409), 247 states have return successors, (556), 400 states have call predecessors, (556), 408 states have call successors, (556) [2024-11-09 06:39:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 4222 transitions. [2024-11-09 06:39:36,809 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 4222 transitions. Word has length 115 [2024-11-09 06:39:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:36,810 INFO L471 AbstractCegarLoop]: Abstraction has 3042 states and 4222 transitions. [2024-11-09 06:39:36,810 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) [2024-11-09 06:39:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 4222 transitions. [2024-11-09 06:39:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:39:36,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:36,819 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 06:39:36,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:39:37,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:37,024 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:37,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1745072053, now seen corresponding path program 1 times [2024-11-09 06:39:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690269646] [2024-11-09 06:39:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:39:37,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690269646] [2024-11-09 06:39:37,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690269646] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:39:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:39:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:39:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647947763] [2024-11-09 06:39:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:39:37,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:39:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:39:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:39:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:39:37,101 INFO L87 Difference]: Start difference. First operand 3042 states and 4222 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:39:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:39:37,731 INFO L93 Difference]: Finished difference Result 7455 states and 10927 transitions. [2024-11-09 06:39:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:39:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2024-11-09 06:39:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:39:37,763 INFO L225 Difference]: With dead ends: 7455 [2024-11-09 06:39:37,763 INFO L226 Difference]: Without dead ends: 5204 [2024-11-09 06:39:37,776 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 [2024-11-09 06:39:37,777 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 217 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:39:37,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 338 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:39:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2024-11-09 06:39:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 5174. [2024-11-09 06:39:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5174 states, 4132 states have (on average 1.382623426911907) internal successors, (5713), 4168 states have internal predecessors, (5713), 665 states have call successors, (665), 363 states have call predecessors, (665), 375 states have return successors, (916), 644 states have call predecessors, (916), 664 states have call successors, (916) [2024-11-09 06:39:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 7294 transitions. [2024-11-09 06:39:38,666 INFO L78 Accepts]: Start accepts. Automaton has 5174 states and 7294 transitions. Word has length 118 [2024-11-09 06:39:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:39:38,667 INFO L471 AbstractCegarLoop]: Abstraction has 5174 states and 7294 transitions. [2024-11-09 06:39:38,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:39:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5174 states and 7294 transitions. [2024-11-09 06:39:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 06:39:38,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:39:38,683 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] [2024-11-09 06:39:38,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 06:39:38,683 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:39:38,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:39:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 625773518, now seen corresponding path program 1 times [2024-11-09 06:39:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:39:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633467491] [2024-11-09 06:39:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:39:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 06:39:39,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:39:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633467491] [2024-11-09 06:39:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633467491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:39:39,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318992397] [2024-11-09 06:39:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:39:39,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:39:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:39:39,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:39:39,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:39:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:39:40,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:39:40,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:39:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:39:41,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:39:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 06:39:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318992397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:39:43,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771347954] [2024-11-09 06:39:43,273 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 06:39:43,274 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:39:43,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:39:43,274 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:39:43,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:39:56,755 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 191 for LOIs [2024-11-09 06:39:57,014 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 06:39:57,049 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 06:39:57,053 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2024-11-09 06:39:57,891 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 156 for LOIs [2024-11-09 06:39:58,733 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 06:39:58,765 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 149 for LOIs [2024-11-09 06:39:58,904 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 160 for LOIs [2024-11-09 06:39:59,057 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:40:15,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '142150#(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) (exists ((v_~q_free~0_107 Int) (v_~q_req_up~0_107 Int)) (and (or (= ~p_dw_st~0 0) (exists ((v_~p_dw_pc~0_50 Int) (v_~p_dw_st~0_141 Int)) (and (or (and (= v_~p_dw_st~0_141 1) (= v_~p_dw_pc~0_50 0)) (and (= v_~q_req_up~0_107 1) (<= ~q_buf_0~0 2147483647) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~p_dw_st~0_141 1))) (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)))))) (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))))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-09 06:40:15,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:40:15,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:40:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 18] total 53 [2024-11-09 06:40:15,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686323863] [2024-11-09 06:40:15,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:40:15,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 06:40:15,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 06:40:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=10159, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 06:40:15,725 INFO L87 Difference]: Start difference. First operand 5174 states and 7294 transitions. Second operand has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) [2024-11-09 06:40:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:28,123 INFO L93 Difference]: Finished difference Result 6581 states and 8969 transitions. [2024-11-09 06:40:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-11-09 06:40:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) Word has length 124 [2024-11-09 06:40:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:28,158 INFO L225 Difference]: With dead ends: 6581 [2024-11-09 06:40:28,158 INFO L226 Difference]: Without dead ends: 5890 [2024-11-09 06:40:28,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 21923 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=6074, Invalid=50332, Unknown=0, NotChecked=0, Total=56406 [2024-11-09 06:40:28,177 INFO L432 NwaCegarLoop]: 196 mSDtfsCounter, 3918 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 4906 mSolverCounterSat, 1951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3918 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 6857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1951 IncrementalHoareTripleChecker+Valid, 4906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:28,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3918 Valid, 3072 Invalid, 6857 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1951 Valid, 4906 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 06:40:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2024-11-09 06:40:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 4958. [2024-11-09 06:40:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4958 states, 4000 states have (on average 1.39075) internal successors, (5563), 4031 states have internal predecessors, (5563), 622 states have call successors, (622), 328 states have call predecessors, (622), 334 states have return successors, (855), 600 states have call predecessors, (855), 621 states have call successors, (855) [2024-11-09 06:40:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 7040 transitions. [2024-11-09 06:40:29,009 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 7040 transitions. Word has length 124 [2024-11-09 06:40:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:29,009 INFO L471 AbstractCegarLoop]: Abstraction has 4958 states and 7040 transitions. [2024-11-09 06:40:29,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 37 states have (on average 5.783783783783784) internal successors, (214), 40 states have internal predecessors, (214), 27 states have call successors, (49), 19 states have call predecessors, (49), 22 states have return successors, (51), 25 states have call predecessors, (51), 27 states have call successors, (51) [2024-11-09 06:40:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 7040 transitions. [2024-11-09 06:40:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 06:40:29,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:29,023 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] [2024-11-09 06:40:29,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:40:29,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:29,226 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:29,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1871546394, now seen corresponding path program 1 times [2024-11-09 06:40:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:29,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814712383] [2024-11-09 06:40:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:40:29,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:29,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814712383] [2024-11-09 06:40:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814712383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:29,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207469420] [2024-11-09 06:40:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:29,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:29,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:29,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:29,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:40:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:29,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 06:40:29,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:40:29,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:40:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207469420] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:30,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:40:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 06:40:30,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133742892] [2024-11-09 06:40:30,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:40:30,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:40:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:40:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:40:30,076 INFO L87 Difference]: Start difference. First operand 4958 states and 7040 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) [2024-11-09 06:40:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:31,478 INFO L93 Difference]: Finished difference Result 5227 states and 7338 transitions. [2024-11-09 06:40:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:40:31,478 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 [2024-11-09 06:40:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:31,505 INFO L225 Difference]: With dead ends: 5227 [2024-11-09 06:40:31,505 INFO L226 Difference]: Without dead ends: 4389 [2024-11-09 06:40:31,512 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 [2024-11-09 06:40:31,513 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 497 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:31,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 429 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:40:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2024-11-09 06:40:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 4389. [2024-11-09 06:40:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 3596 states have (on average 1.4204671857619577) internal successors, (5108), 3621 states have internal predecessors, (5108), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2024-11-09 06:40:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6404 transitions. [2024-11-09 06:40:32,058 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6404 transitions. Word has length 125 [2024-11-09 06:40:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:32,058 INFO L471 AbstractCegarLoop]: Abstraction has 4389 states and 6404 transitions. [2024-11-09 06:40:32,058 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) [2024-11-09 06:40:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6404 transitions. [2024-11-09 06:40:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:40:32,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:32,072 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 06:40:32,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:40:32,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:32,276 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:32,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1366681322, now seen corresponding path program 1 times [2024-11-09 06:40:32,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:32,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473477939] [2024-11-09 06:40:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 06:40:32,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:32,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473477939] [2024-11-09 06:40:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473477939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:40:32,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:40:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:40:32,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370054963] [2024-11-09 06:40:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:40:32,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:40:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:40:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:40:32,422 INFO L87 Difference]: Start difference. First operand 4389 states and 6404 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:40:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:33,573 INFO L93 Difference]: Finished difference Result 12978 states and 19277 transitions. [2024-11-09 06:40:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:40:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2024-11-09 06:40:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:33,630 INFO L225 Difference]: With dead ends: 12978 [2024-11-09 06:40:33,631 INFO L226 Difference]: Without dead ends: 8595 [2024-11-09 06:40:33,657 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 [2024-11-09 06:40:33,658 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 134 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:33,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 283 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:40:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2024-11-09 06:40:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8537. [2024-11-09 06:40:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8537 states, 6996 states have (on average 1.4048027444253859) internal successors, (9828), 7045 states have internal predecessors, (9828), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2024-11-09 06:40:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8537 states to 8537 states and 12300 transitions. [2024-11-09 06:40:34,778 INFO L78 Accepts]: Start accepts. Automaton has 8537 states and 12300 transitions. Word has length 118 [2024-11-09 06:40:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:34,779 INFO L471 AbstractCegarLoop]: Abstraction has 8537 states and 12300 transitions. [2024-11-09 06:40:34,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:40:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8537 states and 12300 transitions. [2024-11-09 06:40:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:40:34,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:34,814 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, 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] [2024-11-09 06:40:34,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 06:40:34,815 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:34,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -481842456, now seen corresponding path program 1 times [2024-11-09 06:40:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531283138] [2024-11-09 06:40:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 06:40:34,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531283138] [2024-11-09 06:40:34,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531283138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658180837] [2024-11-09 06:40:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:34,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:40:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:35,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:40:35,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:40:35,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:40:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658180837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:40:35,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:40:35,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:40:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906395016] [2024-11-09 06:40:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:40:35,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:40:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:40:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:35,228 INFO L87 Difference]: Start difference. First operand 8537 states and 12300 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:36,514 INFO L93 Difference]: Finished difference Result 15813 states and 23126 transitions. [2024-11-09 06:40:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:40:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 06:40:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:36,593 INFO L225 Difference]: With dead ends: 15813 [2024-11-09 06:40:36,594 INFO L226 Difference]: Without dead ends: 11431 [2024-11-09 06:40:36,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:36,618 INFO L432 NwaCegarLoop]: 213 mSDtfsCounter, 83 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:36,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 354 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:40:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2024-11-09 06:40:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 10305. [2024-11-09 06:40:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10305 states, 8652 states have (on average 1.4308830328247804) internal successors, (12380), 8701 states have internal predecessors, (12380), 1084 states have call successors, (1084), 568 states have call predecessors, (1084), 568 states have return successors, (1500), 1036 states have call predecessors, (1500), 1084 states have call successors, (1500) [2024-11-09 06:40:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10305 states to 10305 states and 14964 transitions. [2024-11-09 06:40:37,956 INFO L78 Accepts]: Start accepts. Automaton has 10305 states and 14964 transitions. Word has length 134 [2024-11-09 06:40:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:37,957 INFO L471 AbstractCegarLoop]: Abstraction has 10305 states and 14964 transitions. [2024-11-09 06:40:37,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 10305 states and 14964 transitions. [2024-11-09 06:40:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:40:37,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:37,993 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:38,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:40:38,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:38,198 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:38,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1593590716, now seen corresponding path program 1 times [2024-11-09 06:40:38,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:38,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361147932] [2024-11-09 06:40:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 06:40:38,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361147932] [2024-11-09 06:40:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361147932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:38,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870254666] [2024-11-09 06:40:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:38,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:38,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:38,334 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:38,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:40:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:38,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:40:38,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:40:38,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:40:38,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870254666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:40:38,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:40:38,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:40:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388621731] [2024-11-09 06:40:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:40:38,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:40:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:40:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:38,600 INFO L87 Difference]: Start difference. First operand 10305 states and 14964 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:39,974 INFO L93 Difference]: Finished difference Result 19489 states and 28562 transitions. [2024-11-09 06:40:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:40:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 06:40:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:40,053 INFO L225 Difference]: With dead ends: 19489 [2024-11-09 06:40:40,053 INFO L226 Difference]: Without dead ends: 14237 [2024-11-09 06:40:40,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:40,075 INFO L432 NwaCegarLoop]: 234 mSDtfsCounter, 95 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:40,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 377 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:40:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14237 states. [2024-11-09 06:40:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14237 to 12831. [2024-11-09 06:40:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12831 states, 11010 states have (on average 1.449227974568574) internal successors, (15956), 11059 states have internal predecessors, (15956), 1168 states have call successors, (1168), 652 states have call predecessors, (1168), 652 states have return successors, (1584), 1120 states have call predecessors, (1584), 1168 states have call successors, (1584) [2024-11-09 06:40:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12831 states to 12831 states and 18708 transitions. [2024-11-09 06:40:41,737 INFO L78 Accepts]: Start accepts. Automaton has 12831 states and 18708 transitions. Word has length 134 [2024-11-09 06:40:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:41,738 INFO L471 AbstractCegarLoop]: Abstraction has 12831 states and 18708 transitions. [2024-11-09 06:40:41,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12831 states and 18708 transitions. [2024-11-09 06:40:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:40:41,775 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:41,775 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, 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] [2024-11-09 06:40:41,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:40:41,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:40:41,980 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:41,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash -667751030, now seen corresponding path program 1 times [2024-11-09 06:40:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:41,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388644126] [2024-11-09 06:40:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:41,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 06:40:42,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388644126] [2024-11-09 06:40:42,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388644126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712745886] [2024-11-09 06:40:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:42,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:42,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:42,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:40:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:42,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:40:42,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:40:42,392 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:40:42,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712745886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:40:42,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:40:42,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:40:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29250581] [2024-11-09 06:40:42,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:40:42,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:40:42,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:40:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:40:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:42,395 INFO L87 Difference]: Start difference. First operand 12831 states and 18708 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:40:43,961 INFO L93 Difference]: Finished difference Result 24681 states and 36272 transitions. [2024-11-09 06:40:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:40:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 06:40:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:40:44,038 INFO L225 Difference]: With dead ends: 24681 [2024-11-09 06:40:44,039 INFO L226 Difference]: Without dead ends: 18082 [2024-11-09 06:40:44,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:40:44,067 INFO L432 NwaCegarLoop]: 239 mSDtfsCounter, 101 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:40:44,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 382 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:40:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2024-11-09 06:40:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 16536. [2024-11-09 06:40:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16536 states, 14463 states have (on average 1.4624904929820923) internal successors, (21152), 14512 states have internal predecessors, (21152), 1294 states have call successors, (1294), 778 states have call predecessors, (1294), 778 states have return successors, (1710), 1246 states have call predecessors, (1710), 1294 states have call successors, (1710) [2024-11-09 06:40:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16536 states to 16536 states and 24156 transitions. [2024-11-09 06:40:46,057 INFO L78 Accepts]: Start accepts. Automaton has 16536 states and 24156 transitions. Word has length 134 [2024-11-09 06:40:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:40:46,058 INFO L471 AbstractCegarLoop]: Abstraction has 16536 states and 24156 transitions. [2024-11-09 06:40:46,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:40:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16536 states and 24156 transitions. [2024-11-09 06:40:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:40:46,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:40:46,095 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:40:46,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 06:40:46,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:40:46,296 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:40:46,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:40:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2061571782, now seen corresponding path program 1 times [2024-11-09 06:40:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:40:46,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292704765] [2024-11-09 06:40:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:40:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 06:40:46,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292704765] [2024-11-09 06:40:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292704765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605503785] [2024-11-09 06:40:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:40:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:46,760 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:40:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:47,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 06:40:47,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:40:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 06:40:47,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:40:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 06:40:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605503785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:40:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839169515] [2024-11-09 06:40:47,902 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2024-11-09 06:40:47,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:40:47,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:40:47,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:40:47,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:41:02,832 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 193 for LOIs [2024-11-09 06:41:03,165 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 74 for LOIs [2024-11-09 06:41:03,312 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 145 for LOIs [2024-11-09 06:41:03,462 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 107 for LOIs [2024-11-09 06:41:03,736 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 74 for LOIs [2024-11-09 06:41:05,858 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 182 for LOIs [2024-11-09 06:41:06,083 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:41:31,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '327609#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 2147483647) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 0)) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_19| 2147483648)))) (= ~m_i~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (exists ((|v_ULTIMATE.start_eval2_~tmp~5#1_24| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp~5#1_24| 1) (not (= |v_ULTIMATE.start_eval2_~tmp~5#1_24| 0)) (<= 0 |v_ULTIMATE.start_eval2_~tmp~5#1_24|))) (not (= ~token~0 (+ 5 ~local~0))))' at error location [2024-11-09 06:41:31,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:41:31,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:41:31,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 06:41:31,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029068322] [2024-11-09 06:41:31,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:41:31,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:41:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:41:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=3300, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:41:31,018 INFO L87 Difference]: Start difference. First operand 16536 states and 24156 transitions. Second operand has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 06:41:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:37,824 INFO L93 Difference]: Finished difference Result 62461 states and 92132 transitions. [2024-11-09 06:41:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:41:37,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 138 [2024-11-09 06:41:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:37,959 INFO L225 Difference]: With dead ends: 62461 [2024-11-09 06:41:37,959 INFO L226 Difference]: Without dead ends: 45932 [2024-11-09 06:41:37,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 344 SyntacticMatches, 39 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4392 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=982, Invalid=7574, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 06:41:37,994 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 2753 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2753 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:37,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2753 Valid, 767 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 06:41:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45932 states. [2024-11-09 06:41:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45932 to 43412. [2024-11-09 06:41:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43412 states, 38083 states have (on average 1.430454533518893) internal successors, (54476), 38204 states have internal predecessors, (54476), 3186 states have call successors, (3186), 2142 states have call predecessors, (3186), 2142 states have return successors, (4270), 3066 states have call predecessors, (4270), 3186 states have call successors, (4270) [2024-11-09 06:41:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43412 states to 43412 states and 61932 transitions. [2024-11-09 06:41:43,024 INFO L78 Accepts]: Start accepts. Automaton has 43412 states and 61932 transitions. Word has length 138 [2024-11-09 06:41:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:43,024 INFO L471 AbstractCegarLoop]: Abstraction has 43412 states and 61932 transitions. [2024-11-09 06:41:43,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 06:41:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 43412 states and 61932 transitions. [2024-11-09 06:41:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:41:43,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:43,082 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:41:43,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:41:43,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:41:43,287 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:43,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash 828157349, now seen corresponding path program 1 times [2024-11-09 06:41:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:43,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315295663] [2024-11-09 06:41:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 06:41:43,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315295663] [2024-11-09 06:41:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315295663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399327215] [2024-11-09 06:41:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:43,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:43,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:41:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:43,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:41:43,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:41:43,679 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:41:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399327215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:41:43,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:41:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:41:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038384419] [2024-11-09 06:41:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:41:43,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:41:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:41:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:41:43,682 INFO L87 Difference]: Start difference. First operand 43412 states and 61932 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:41:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:41:48,870 INFO L93 Difference]: Finished difference Result 79974 states and 114297 transitions. [2024-11-09 06:41:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:41:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2024-11-09 06:41:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:41:49,028 INFO L225 Difference]: With dead ends: 79974 [2024-11-09 06:41:49,028 INFO L226 Difference]: Without dead ends: 48332 [2024-11-09 06:41:49,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:41:49,090 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 130 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:41:49,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 188 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:41:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48332 states. [2024-11-09 06:41:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48332 to 47632. [2024-11-09 06:41:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47632 states, 41878 states have (on average 1.4109317541429867) internal successors, (59087), 41975 states have internal predecessors, (59087), 3300 states have call successors, (3300), 2448 states have call predecessors, (3300), 2453 states have return successors, (4431), 3209 states have call predecessors, (4431), 3300 states have call successors, (4431) [2024-11-09 06:41:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47632 states to 47632 states and 66818 transitions. [2024-11-09 06:41:54,895 INFO L78 Accepts]: Start accepts. Automaton has 47632 states and 66818 transitions. Word has length 135 [2024-11-09 06:41:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:41:54,896 INFO L471 AbstractCegarLoop]: Abstraction has 47632 states and 66818 transitions. [2024-11-09 06:41:54,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:41:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47632 states and 66818 transitions. [2024-11-09 06:41:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:41:55,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:41:55,128 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, 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] [2024-11-09 06:41:55,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:41:55,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:41:55,330 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:41:55,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:41:55,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1953417318, now seen corresponding path program 1 times [2024-11-09 06:41:55,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:41:55,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426247980] [2024-11-09 06:41:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:55,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:41:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-09 06:41:55,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:41:55,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426247980] [2024-11-09 06:41:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426247980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:41:55,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41282945] [2024-11-09 06:41:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:41:55,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:41:55,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:41:55,498 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:41:55,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a3f5d0-cfe7-40c7-bdc7-d4d1c5563b74/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:41:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:41:55,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:41:55,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:41:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:41:55,748 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:41:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41282945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:41:55,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:41:55,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:41:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295755258] [2024-11-09 06:41:55,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:41:55,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:41:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:41:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:41:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:41:55,753 INFO L87 Difference]: Start difference. First operand 47632 states and 66818 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 06:42:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:03,572 INFO L93 Difference]: Finished difference Result 91659 states and 129333 transitions. [2024-11-09 06:42:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:42:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2024-11-09 06:42:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:03,906 INFO L225 Difference]: With dead ends: 91659 [2024-11-09 06:42:03,906 INFO L226 Difference]: Without dead ends: 56999 [2024-11-09 06:42:03,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:42:03,967 INFO L432 NwaCegarLoop]: 208 mSDtfsCounter, 77 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:03,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 350 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:42:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56999 states.