./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:10:58,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:10:58,787 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:10:58,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:10:58,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:10:58,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:10:58,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:10:58,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:10:58,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:10:58,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:10:58,821 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:10:58,821 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:10:58,821 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:10:58,821 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:10:58,821 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:10:58,822 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:10:58,822 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:10:58,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:10:58,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:10:58,823 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:10:58,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:10:58,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:10:58,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:10:58,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:10:58,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:10:58,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:10:58,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:10:58,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:10:58,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:10:58,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:10:58,826 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2024-11-14 04:10:59,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:10:59,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:10:59,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:10:59,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:10:59,169 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:10:59,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c Unable to find full path for "g++" [2024-11-14 04:11:01,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:11:01,423 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:11:01,424 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2024-11-14 04:11:01,450 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/data/bfdddd28a/5526b476909a4c109c82ab7a4ed84410/FLAGcc5f755f7 [2024-11-14 04:11:01,474 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/data/bfdddd28a/5526b476909a4c109c82ab7a4ed84410 [2024-11-14 04:11:01,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:11:01,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:11:01,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:01,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:11:01,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:11:01,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:01" (1/1) ... [2024-11-14 04:11:01,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b04cacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:01, skipping insertion in model container [2024-11-14 04:11:01,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:01" (1/1) ... [2024-11-14 04:11:01,544 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:11:01,737 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_07a5114e-9d62-4ee1-8d6a-27be274cc277/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2024-11-14 04:11:01,828 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_07a5114e-9d62-4ee1-8d6a-27be274cc277/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2024-11-14 04:11:01,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:02,015 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:11:02,027 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_07a5114e-9d62-4ee1-8d6a-27be274cc277/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2024-11-14 04:11:02,062 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_07a5114e-9d62-4ee1-8d6a-27be274cc277/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2024-11-14 04:11:02,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:02,138 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:11:02,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02 WrapperNode [2024-11-14 04:11:02,139 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:02,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:02,140 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:11:02,140 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:11:02,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,246 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1055 [2024-11-14 04:11:02,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:02,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:11:02,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:11:02,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:11:02,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:11:02,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:11:02,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:11:02,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:11:02,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (1/1) ... [2024-11-14 04:11:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:11:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:02,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:11:02,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:11:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:11:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 04:11:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 04:11:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 04:11:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 04:11:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 04:11:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 04:11:02,607 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:11:02,609 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:11:04,073 INFO L? ?]: Removed 131 outVars from TransFormulas that were not future-live. [2024-11-14 04:11:04,075 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:11:04,808 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:11:04,812 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-14 04:11:04,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:04 BoogieIcfgContainer [2024-11-14 04:11:04,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:11:04,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:11:04,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:11:04,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:11:04,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:11:01" (1/3) ... [2024-11-14 04:11:04,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a3474f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:04, skipping insertion in model container [2024-11-14 04:11:04,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:02" (2/3) ... [2024-11-14 04:11:04,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a3474f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:04, skipping insertion in model container [2024-11-14 04:11:04,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:04" (3/3) ... [2024-11-14 04:11:04,826 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2024-11-14 04:11:04,847 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:11:04,850 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c that has 16 procedures, 279 locations, 1 initial locations, 19 loop locations, and 2 error locations. [2024-11-14 04:11:04,938 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:11:04,953 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;@f3bcf88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:11:04,956 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:11:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-14 04:11:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 04:11:04,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:04,974 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:04,975 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:04,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1670120611, now seen corresponding path program 1 times [2024-11-14 04:11:04,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:04,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681172917] [2024-11-14 04:11:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:05,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:05,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681172917] [2024-11-14 04:11:05,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681172917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:05,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:11:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448783320] [2024-11-14 04:11:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:05,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:11:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:11:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:11:05,568 INFO L87 Difference]: Start difference. First operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:11:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:07,103 INFO L93 Difference]: Finished difference Result 977 states and 1430 transitions. [2024-11-14 04:11:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:11:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-14 04:11:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:07,132 INFO L225 Difference]: With dead ends: 977 [2024-11-14 04:11:07,132 INFO L226 Difference]: Without dead ends: 684 [2024-11-14 04:11:07,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:11:07,144 INFO L432 NwaCegarLoop]: 457 mSDtfsCounter, 1107 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:07,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1200 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:11:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2024-11-14 04:11:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 613. [2024-11-14 04:11:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 453 states have (on average 1.3620309050772628) internal successors, (617), 458 states have internal predecessors, (617), 97 states have call successors, (97), 63 states have call predecessors, (97), 61 states have return successors, (108), 93 states have call predecessors, (108), 93 states have call successors, (108) [2024-11-14 04:11:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 822 transitions. [2024-11-14 04:11:07,331 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 822 transitions. Word has length 45 [2024-11-14 04:11:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:07,333 INFO L471 AbstractCegarLoop]: Abstraction has 613 states and 822 transitions. [2024-11-14 04:11:07,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:11:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 822 transitions. [2024-11-14 04:11:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:11:07,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:07,336 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:07,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:11:07,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:07,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1529973134, now seen corresponding path program 1 times [2024-11-14 04:11:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127895970] [2024-11-14 04:11:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:07,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127895970] [2024-11-14 04:11:07,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127895970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:07,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:07,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:11:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922072249] [2024-11-14 04:11:07,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:07,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:11:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:07,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:11:07,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:11:07,850 INFO L87 Difference]: Start difference. First operand 613 states and 822 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 04:11:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:09,151 INFO L93 Difference]: Finished difference Result 1374 states and 1769 transitions. [2024-11-14 04:11:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:11:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 46 [2024-11-14 04:11:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:09,165 INFO L225 Difference]: With dead ends: 1374 [2024-11-14 04:11:09,165 INFO L226 Difference]: Without dead ends: 971 [2024-11-14 04:11:09,167 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 [2024-11-14 04:11:09,172 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 561 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:09,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1219 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:11:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2024-11-14 04:11:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 942. [2024-11-14 04:11:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 676 states have (on average 1.3136094674556213) internal successors, (888), 682 states have internal predecessors, (888), 153 states have call successors, (153), 111 states have call predecessors, (153), 111 states have return successors, (182), 150 states have call predecessors, (182), 149 states have call successors, (182) [2024-11-14 04:11:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1223 transitions. [2024-11-14 04:11:09,327 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1223 transitions. Word has length 46 [2024-11-14 04:11:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:09,327 INFO L471 AbstractCegarLoop]: Abstraction has 942 states and 1223 transitions. [2024-11-14 04:11:09,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 04:11:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1223 transitions. [2024-11-14 04:11:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:11:09,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:09,334 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:09,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:11:09,334 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:09,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash -411468318, now seen corresponding path program 1 times [2024-11-14 04:11:09,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:09,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986851278] [2024-11-14 04:11:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:09,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:09,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986851278] [2024-11-14 04:11:09,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986851278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:09,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:09,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:11:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589984351] [2024-11-14 04:11:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:09,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:09,429 INFO L87 Difference]: Start difference. First operand 942 states and 1223 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:11:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:09,730 INFO L93 Difference]: Finished difference Result 1883 states and 2382 transitions. [2024-11-14 04:11:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-14 04:11:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:09,740 INFO L225 Difference]: With dead ends: 1883 [2024-11-14 04:11:09,743 INFO L226 Difference]: Without dead ends: 1201 [2024-11-14 04:11:09,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:09,746 INFO L432 NwaCegarLoop]: 342 mSDtfsCounter, 68 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:09,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 656 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2024-11-14 04:11:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1179. [2024-11-14 04:11:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 837 states have (on average 1.2927120669056154) internal successors, (1082), 843 states have internal predecessors, (1082), 195 states have call successors, (195), 149 states have call predecessors, (195), 145 states have return successors, (228), 188 states have call predecessors, (228), 191 states have call successors, (228) [2024-11-14 04:11:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1505 transitions. [2024-11-14 04:11:09,930 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1505 transitions. Word has length 47 [2024-11-14 04:11:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:09,932 INFO L471 AbstractCegarLoop]: Abstraction has 1179 states and 1505 transitions. [2024-11-14 04:11:09,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:11:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1505 transitions. [2024-11-14 04:11:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 04:11:09,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:09,937 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] [2024-11-14 04:11:09,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:11:09,937 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:09,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash 702739879, now seen corresponding path program 1 times [2024-11-14 04:11:09,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:09,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174136909] [2024-11-14 04:11:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:09,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:11:10,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:10,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174136909] [2024-11-14 04:11:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174136909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:10,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:11:10,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963708316] [2024-11-14 04:11:10,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:10,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:10,039 INFO L87 Difference]: Start difference. First operand 1179 states and 1505 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:11:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:10,280 INFO L93 Difference]: Finished difference Result 1585 states and 1995 transitions. [2024-11-14 04:11:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:10,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-14 04:11:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:10,292 INFO L225 Difference]: With dead ends: 1585 [2024-11-14 04:11:10,292 INFO L226 Difference]: Without dead ends: 1030 [2024-11-14 04:11:10,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:10,298 INFO L432 NwaCegarLoop]: 343 mSDtfsCounter, 368 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:10,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 405 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2024-11-14 04:11:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 824. [2024-11-14 04:11:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 601 states have (on average 1.2961730449251248) internal successors, (779), 606 states have internal predecessors, (779), 132 states have call successors, (132), 95 states have call predecessors, (132), 89 states have return successors, (136), 124 states have call predecessors, (136), 128 states have call successors, (136) [2024-11-14 04:11:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1047 transitions. [2024-11-14 04:11:10,382 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1047 transitions. Word has length 53 [2024-11-14 04:11:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:10,384 INFO L471 AbstractCegarLoop]: Abstraction has 824 states and 1047 transitions. [2024-11-14 04:11:10,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:11:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1047 transitions. [2024-11-14 04:11:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:11:10,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:10,386 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:10,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:11:10,387 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:10,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2092789233, now seen corresponding path program 1 times [2024-11-14 04:11:10,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603534307] [2024-11-14 04:11:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:10,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:10,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603534307] [2024-11-14 04:11:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603534307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:10,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:10,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:11:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645587545] [2024-11-14 04:11:10,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:10,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:11:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:11:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:11:10,532 INFO L87 Difference]: Start difference. First operand 824 states and 1047 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 04:11:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:11,046 INFO L93 Difference]: Finished difference Result 1079 states and 1348 transitions. [2024-11-14 04:11:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:11:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-14 04:11:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:11,058 INFO L225 Difference]: With dead ends: 1079 [2024-11-14 04:11:11,058 INFO L226 Difference]: Without dead ends: 1076 [2024-11-14 04:11:11,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:11:11,060 INFO L432 NwaCegarLoop]: 338 mSDtfsCounter, 671 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:11,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 381 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:11:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-11-14 04:11:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 823. [2024-11-14 04:11:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 601 states have (on average 1.286189683860233) internal successors, (773), 605 states have internal predecessors, (773), 131 states have call successors, (131), 95 states have call predecessors, (131), 89 states have return successors, (136), 124 states have call predecessors, (136), 128 states have call successors, (136) [2024-11-14 04:11:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1040 transitions. [2024-11-14 04:11:11,157 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1040 transitions. Word has length 54 [2024-11-14 04:11:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:11,160 INFO L471 AbstractCegarLoop]: Abstraction has 823 states and 1040 transitions. [2024-11-14 04:11:11,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 04:11:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1040 transitions. [2024-11-14 04:11:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 04:11:11,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:11,162 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:11,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:11:11,162 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:11,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash -453416406, now seen corresponding path program 1 times [2024-11-14 04:11:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:11,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499146195] [2024-11-14 04:11:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:11,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499146195] [2024-11-14 04:11:11,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499146195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:11,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357155122] [2024-11-14 04:11:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:11,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:11,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:11,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:11:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:11,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:11:11,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:11,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357155122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:12,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100439124] [2024-11-14 04:11:12,048 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:11:12,048 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:12,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:12,056 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:12,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:19,271 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2024-11-14 04:11:19,351 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2024-11-14 04:11:19,439 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2024-11-14 04:11:20,837 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2024-11-14 04:11:21,076 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2024-11-14 04:11:21,354 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2024-11-14 04:11:21,429 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2024-11-14 04:11:21,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [100439124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:47,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:47,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 04:11:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405639265] [2024-11-14 04:11:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:47,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:11:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:11:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:11:47,663 INFO L87 Difference]: Start difference. First operand 823 states and 1040 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 04:12:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:09,691 INFO L93 Difference]: Finished difference Result 1462 states and 1796 transitions. [2024-11-14 04:12:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:12:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-14 04:12:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:09,700 INFO L225 Difference]: With dead ends: 1462 [2024-11-14 04:12:09,700 INFO L226 Difference]: Without dead ends: 849 [2024-11-14 04:12:09,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:12:09,704 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 109 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:09,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2044 Invalid, 4065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2024-11-14 04:12:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2024-11-14 04:12:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 841. [2024-11-14 04:12:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 617 states have (on average 1.2820097244732578) internal successors, (791), 621 states have internal predecessors, (791), 132 states have call successors, (132), 96 states have call predecessors, (132), 90 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2024-11-14 04:12:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1060 transitions. [2024-11-14 04:12:09,838 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1060 transitions. Word has length 55 [2024-11-14 04:12:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:09,839 INFO L471 AbstractCegarLoop]: Abstraction has 841 states and 1060 transitions. [2024-11-14 04:12:09,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 04:12:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1060 transitions. [2024-11-14 04:12:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 04:12:09,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:09,841 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:09,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:12:10,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:10,042 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:10,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1872931270, now seen corresponding path program 1 times [2024-11-14 04:12:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577195979] [2024-11-14 04:12:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:10,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:12:10,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577195979] [2024-11-14 04:12:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577195979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:12:10,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:12:10,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:12:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674088159] [2024-11-14 04:12:10,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:12:10,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:12:10,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:12:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:12:10,121 INFO L87 Difference]: Start difference. First operand 841 states and 1060 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 04:12:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:10,426 INFO L93 Difference]: Finished difference Result 1423 states and 1743 transitions. [2024-11-14 04:12:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:12:10,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2024-11-14 04:12:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:10,435 INFO L225 Difference]: With dead ends: 1423 [2024-11-14 04:12:10,435 INFO L226 Difference]: Without dead ends: 1050 [2024-11-14 04:12:10,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:12:10,439 INFO L432 NwaCegarLoop]: 364 mSDtfsCounter, 43 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:10,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 692 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:12:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2024-11-14 04:12:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 962. [2024-11-14 04:12:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 698 states have (on average 1.2664756446991403) internal successors, (884), 706 states have internal predecessors, (884), 154 states have call successors, (154), 118 states have call predecessors, (154), 108 states have return successors, (159), 139 states have call predecessors, (159), 151 states have call successors, (159) [2024-11-14 04:12:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1197 transitions. [2024-11-14 04:12:10,602 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1197 transitions. Word has length 61 [2024-11-14 04:12:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:10,602 INFO L471 AbstractCegarLoop]: Abstraction has 962 states and 1197 transitions. [2024-11-14 04:12:10,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 04:12:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1197 transitions. [2024-11-14 04:12:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 04:12:10,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:10,605 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:10,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:12:10,605 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:10,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1187265502, now seen corresponding path program 1 times [2024-11-14 04:12:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:10,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157775179] [2024-11-14 04:12:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:12:10,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157775179] [2024-11-14 04:12:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157775179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:12:10,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:12:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:12:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503275729] [2024-11-14 04:12:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:12:10,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:12:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:12:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:12:10,842 INFO L87 Difference]: Start difference. First operand 962 states and 1197 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:12:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:12,059 INFO L93 Difference]: Finished difference Result 1915 states and 2737 transitions. [2024-11-14 04:12:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:12:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-11-14 04:12:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:12,071 INFO L225 Difference]: With dead ends: 1915 [2024-11-14 04:12:12,071 INFO L226 Difference]: Without dead ends: 1716 [2024-11-14 04:12:12,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:12:12,074 INFO L432 NwaCegarLoop]: 561 mSDtfsCounter, 1525 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:12,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 1468 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:12:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2024-11-14 04:12:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1703. [2024-11-14 04:12:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1330 states have (on average 1.3714285714285714) internal successors, (1824), 1341 states have internal predecessors, (1824), 239 states have call successors, (239), 142 states have call predecessors, (239), 132 states have return successors, (306), 221 states have call predecessors, (306), 236 states have call successors, (306) [2024-11-14 04:12:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2369 transitions. [2024-11-14 04:12:12,298 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2369 transitions. Word has length 68 [2024-11-14 04:12:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:12,298 INFO L471 AbstractCegarLoop]: Abstraction has 1703 states and 2369 transitions. [2024-11-14 04:12:12,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:12:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2369 transitions. [2024-11-14 04:12:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 04:12:12,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:12,302 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:12,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:12:12,303 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:12,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 569810331, now seen corresponding path program 1 times [2024-11-14 04:12:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615597786] [2024-11-14 04:12:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 04:12:12,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615597786] [2024-11-14 04:12:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615597786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:12:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191843003] [2024-11-14 04:12:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:12,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:12:12,781 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:12:12,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:12:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:12,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:12:12,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:12:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:12:13,043 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:12:13,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191843003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:12:13,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:12:13,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 04:12:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026093781] [2024-11-14 04:12:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:12:13,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:12:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:12:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:12:13,049 INFO L87 Difference]: Start difference. First operand 1703 states and 2369 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:12:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:13,621 INFO L93 Difference]: Finished difference Result 2250 states and 3020 transitions. [2024-11-14 04:12:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:12:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 04:12:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:13,649 INFO L225 Difference]: With dead ends: 2250 [2024-11-14 04:12:13,650 INFO L226 Difference]: Without dead ends: 1498 [2024-11-14 04:12:13,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:12:13,654 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 324 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:13,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1377 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:12:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2024-11-14 04:12:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1475. [2024-11-14 04:12:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1188 states have (on average 1.3973063973063973) internal successors, (1660), 1197 states have internal predecessors, (1660), 191 states have call successors, (191), 100 states have call predecessors, (191), 94 states have return successors, (254), 179 states have call predecessors, (254), 188 states have call successors, (254) [2024-11-14 04:12:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2105 transitions. [2024-11-14 04:12:13,834 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2105 transitions. Word has length 102 [2024-11-14 04:12:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:13,835 INFO L471 AbstractCegarLoop]: Abstraction has 1475 states and 2105 transitions. [2024-11-14 04:12:13,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:12:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2105 transitions. [2024-11-14 04:12:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:12:13,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:13,843 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:13,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:12:14,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:14,044 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:14,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 625494246, now seen corresponding path program 1 times [2024-11-14 04:12:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843212732] [2024-11-14 04:12:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 04:12:14,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843212732] [2024-11-14 04:12:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843212732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:12:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645459431] [2024-11-14 04:12:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:14,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:14,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:12:14,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:12:14,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:12:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:14,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:12:14,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:12:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:12:14,490 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:12:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645459431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:12:14,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:12:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-14 04:12:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145662323] [2024-11-14 04:12:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:12:14,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:12:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:12:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:12:14,492 INFO L87 Difference]: Start difference. First operand 1475 states and 2105 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:12:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:14,785 INFO L93 Difference]: Finished difference Result 1774 states and 2463 transitions. [2024-11-14 04:12:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:12:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-14 04:12:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:14,794 INFO L225 Difference]: With dead ends: 1774 [2024-11-14 04:12:14,794 INFO L226 Difference]: Without dead ends: 1324 [2024-11-14 04:12:14,796 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 [2024-11-14 04:12:14,796 INFO L432 NwaCegarLoop]: 366 mSDtfsCounter, 53 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:14,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 677 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:12:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2024-11-14 04:12:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1208. [2024-11-14 04:12:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 998 states have (on average 1.4298597194388778) internal successors, (1427), 1005 states have internal predecessors, (1427), 149 states have call successors, (149), 61 states have call predecessors, (149), 59 states have return successors, (208), 143 states have call predecessors, (208), 146 states have call successors, (208) [2024-11-14 04:12:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1784 transitions. [2024-11-14 04:12:14,952 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1784 transitions. Word has length 104 [2024-11-14 04:12:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:14,952 INFO L471 AbstractCegarLoop]: Abstraction has 1208 states and 1784 transitions. [2024-11-14 04:12:14,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:12:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1784 transitions. [2024-11-14 04:12:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:12:14,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:14,955 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:14,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:12:15,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:12:15,156 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:15,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash 225503047, now seen corresponding path program 1 times [2024-11-14 04:12:15,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:15,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326611734] [2024-11-14 04:12:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:15,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:12:15,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326611734] [2024-11-14 04:12:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326611734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:12:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675530928] [2024-11-14 04:12:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:12:15,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:12:15,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:12:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:15,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:12:15,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:12:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:12:15,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:12:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 04:12:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675530928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:12:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172713023] [2024-11-14 04:12:16,187 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 04:12:16,187 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:12:16,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:12:16,188 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:12:16,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:12:37,806 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 241 for LOIs [2024-11-14 04:12:38,291 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 212 for LOIs [2024-11-14 04:12:38,752 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 158 for LOIs [2024-11-14 04:12:38,798 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 226 for LOIs [2024-11-14 04:12:42,109 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 227 for LOIs [2024-11-14 04:12:44,907 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 172 for LOIs [2024-11-14 04:12:45,093 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 220 for LOIs [2024-11-14 04:12:45,512 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 231 for LOIs [2024-11-14 04:12:45,947 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:13:48,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39307#(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_42 Int)) (and (= ~E_12~0 2) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_18| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_18| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_18| 2147483648)))) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_23|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 1) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 0)))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_42 0)) (and (not (= ~p_dw_st~0 0)) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_23|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 1) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 0)))))) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))) (= ~c_dr_st~0 1))' at error location [2024-11-14 04:13:48,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:13:48,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:13:48,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 04:13:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122878380] [2024-11-14 04:13:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:13:48,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:13:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:13:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:13:48,863 INFO L87 Difference]: Start difference. First operand 1208 states and 1784 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 04:13:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:52,836 INFO L93 Difference]: Finished difference Result 2148 states and 2871 transitions. [2024-11-14 04:13:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 04:13:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-14 04:13:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:52,850 INFO L225 Difference]: With dead ends: 2148 [2024-11-14 04:13:52,850 INFO L226 Difference]: Without dead ends: 1966 [2024-11-14 04:13:52,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 04:13:52,857 INFO L432 NwaCegarLoop]: 305 mSDtfsCounter, 1533 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:52,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 2125 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:13:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2024-11-14 04:13:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1603. [2024-11-14 04:13:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1283 states have (on average 1.373343725643024) internal successors, (1762), 1290 states have internal predecessors, (1762), 207 states have call successors, (207), 113 states have call predecessors, (207), 111 states have return successors, (266), 201 states have call predecessors, (266), 204 states have call successors, (266) [2024-11-14 04:13:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2235 transitions. [2024-11-14 04:13:53,104 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2235 transitions. Word has length 104 [2024-11-14 04:13:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:53,105 INFO L471 AbstractCegarLoop]: Abstraction has 1603 states and 2235 transitions. [2024-11-14 04:13:53,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 04:13:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2235 transitions. [2024-11-14 04:13:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 04:13:53,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:53,109 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:53,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:13:53,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:53,314 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:53,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1000647617, now seen corresponding path program 1 times [2024-11-14 04:13:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233451062] [2024-11-14 04:13:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:13:53,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233451062] [2024-11-14 04:13:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233451062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:53,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:13:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:13:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172721009] [2024-11-14 04:13:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:53,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:13:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:13:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:53,370 INFO L87 Difference]: Start difference. First operand 1603 states and 2235 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 04:13:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:53,702 INFO L93 Difference]: Finished difference Result 2102 states and 2807 transitions. [2024-11-14 04:13:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:13:53,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-14 04:13:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:53,712 INFO L225 Difference]: With dead ends: 2102 [2024-11-14 04:13:53,712 INFO L226 Difference]: Without dead ends: 1593 [2024-11-14 04:13:53,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:53,715 INFO L432 NwaCegarLoop]: 369 mSDtfsCounter, 370 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:53,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 436 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:13:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2024-11-14 04:13:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1584. [2024-11-14 04:13:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1266 states have (on average 1.3665086887835702) internal successors, (1730), 1273 states have internal predecessors, (1730), 206 states have call successors, (206), 112 states have call predecessors, (206), 110 states have return successors, (265), 200 states have call predecessors, (265), 203 states have call successors, (265) [2024-11-14 04:13:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2201 transitions. [2024-11-14 04:13:53,975 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2201 transitions. Word has length 108 [2024-11-14 04:13:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:53,975 INFO L471 AbstractCegarLoop]: Abstraction has 1584 states and 2201 transitions. [2024-11-14 04:13:53,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 04:13:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2201 transitions. [2024-11-14 04:13:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 04:13:53,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:53,981 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:53,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:13:53,982 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:53,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 281700837, now seen corresponding path program 1 times [2024-11-14 04:13:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:53,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35282999] [2024-11-14 04:13:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:13:54,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:54,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35282999] [2024-11-14 04:13:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35282999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947340917] [2024-11-14 04:13:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:54,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:54,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:54,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:13:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:54,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:13:54,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:13:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:13:54,412 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:13:54,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947340917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:54,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:13:54,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 04:13:54,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750731360] [2024-11-14 04:13:54,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:54,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:13:54,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:13:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:13:54,414 INFO L87 Difference]: Start difference. First operand 1584 states and 2201 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:13:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:54,793 INFO L93 Difference]: Finished difference Result 2104 states and 2795 transitions. [2024-11-14 04:13:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:13:54,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-14 04:13:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:54,802 INFO L225 Difference]: With dead ends: 2104 [2024-11-14 04:13:54,802 INFO L226 Difference]: Without dead ends: 1555 [2024-11-14 04:13:54,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:13:54,805 INFO L432 NwaCegarLoop]: 358 mSDtfsCounter, 47 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:54,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1417 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:13:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2024-11-14 04:13:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1495. [2024-11-14 04:13:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1205 states have (on average 1.3775933609958506) internal successors, (1660), 1212 states have internal predecessors, (1660), 191 states have call successors, (191), 99 states have call predecessors, (191), 97 states have return successors, (250), 185 states have call predecessors, (250), 188 states have call successors, (250) [2024-11-14 04:13:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2101 transitions. [2024-11-14 04:13:55,031 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2101 transitions. Word has length 112 [2024-11-14 04:13:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:55,034 INFO L471 AbstractCegarLoop]: Abstraction has 1495 states and 2101 transitions. [2024-11-14 04:13:55,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:13:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2101 transitions. [2024-11-14 04:13:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 04:13:55,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:55,037 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:55,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:13:55,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:13:55,238 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:55,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -891602474, now seen corresponding path program 1 times [2024-11-14 04:13:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238985317] [2024-11-14 04:13:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 04:13:55,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:55,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238985317] [2024-11-14 04:13:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238985317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:55,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:13:55,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:13:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306354301] [2024-11-14 04:13:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:55,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:13:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:13:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:13:55,383 INFO L87 Difference]: Start difference. First operand 1495 states and 2101 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 04:13:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:55,901 INFO L93 Difference]: Finished difference Result 2244 states and 2946 transitions. [2024-11-14 04:13:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:13:55,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-14 04:13:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:55,911 INFO L225 Difference]: With dead ends: 2244 [2024-11-14 04:13:55,911 INFO L226 Difference]: Without dead ends: 1787 [2024-11-14 04:13:55,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:13:55,913 INFO L432 NwaCegarLoop]: 363 mSDtfsCounter, 359 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:55,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1513 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:13:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2024-11-14 04:13:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1753. [2024-11-14 04:13:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1367 states have (on average 1.346013167520117) internal successors, (1840), 1380 states have internal predecessors, (1840), 239 states have call successors, (239), 141 states have call predecessors, (239), 145 states have return successors, (310), 233 states have call predecessors, (310), 236 states have call successors, (310) [2024-11-14 04:13:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2389 transitions. [2024-11-14 04:13:56,215 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2389 transitions. Word has length 113 [2024-11-14 04:13:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:56,215 INFO L471 AbstractCegarLoop]: Abstraction has 1753 states and 2389 transitions. [2024-11-14 04:13:56,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 04:13:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2389 transitions. [2024-11-14 04:13:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 04:13:56,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:56,218 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:56,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:13:56,218 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:56,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -823347677, now seen corresponding path program 1 times [2024-11-14 04:13:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:56,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498991387] [2024-11-14 04:13:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:56,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:13:56,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498991387] [2024-11-14 04:13:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498991387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:56,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:13:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 04:13:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017977467] [2024-11-14 04:13:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:56,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:13:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:13:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:13:56,615 INFO L87 Difference]: Start difference. First operand 1753 states and 2389 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-14 04:13:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:57,855 INFO L93 Difference]: Finished difference Result 2432 states and 3152 transitions. [2024-11-14 04:13:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:13:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2024-11-14 04:13:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:57,864 INFO L225 Difference]: With dead ends: 2432 [2024-11-14 04:13:57,864 INFO L226 Difference]: Without dead ends: 1717 [2024-11-14 04:13:57,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:13:57,866 INFO L432 NwaCegarLoop]: 250 mSDtfsCounter, 1121 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:57,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 1119 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:13:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2024-11-14 04:13:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1697. [2024-11-14 04:13:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1331 states have (on average 1.3493613824192336) internal successors, (1796), 1348 states have internal predecessors, (1796), 224 states have call successors, (224), 129 states have call predecessors, (224), 140 states have return successors, (301), 221 states have call predecessors, (301), 221 states have call successors, (301) [2024-11-14 04:13:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2321 transitions. [2024-11-14 04:13:58,192 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2321 transitions. Word has length 114 [2024-11-14 04:13:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:58,192 INFO L471 AbstractCegarLoop]: Abstraction has 1697 states and 2321 transitions. [2024-11-14 04:13:58,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-14 04:13:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2321 transitions. [2024-11-14 04:13:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 04:13:58,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:58,195 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:58,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 04:13:58,196 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:58,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1125251676, now seen corresponding path program 1 times [2024-11-14 04:13:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:58,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718217133] [2024-11-14 04:13:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 04:13:59,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718217133] [2024-11-14 04:13:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718217133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724565834] [2024-11-14 04:13:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:59,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:59,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:59,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:13:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:59,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 04:13:59,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:14:00,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:14:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724565834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523669112] [2024-11-14 04:14:02,055 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:14:02,056 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:02,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:02,056 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:02,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:45,911 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 260 for LOIs [2024-11-14 04:14:46,184 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 04:14:46,185 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 04:14:46,188 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2024-11-14 04:14:47,675 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 225 for LOIs [2024-11-14 04:14:49,073 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 28 for LOIs [2024-11-14 04:14:49,107 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 218 for LOIs [2024-11-14 04:14:49,349 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 229 for LOIs [2024-11-14 04:14:49,701 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:15:09,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66842#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-14 04:15:09,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:15:09,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:15:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 53 [2024-11-14 04:15:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925240364] [2024-11-14 04:15:09,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:15:09,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 04:15:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 04:15:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=9690, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:15:09,821 INFO L87 Difference]: Start difference. First operand 1697 states and 2321 transitions. Second operand has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 04:15:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:28,502 INFO L93 Difference]: Finished difference Result 3532 states and 4463 transitions. [2024-11-14 04:15:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2024-11-14 04:15:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) Word has length 114 [2024-11-14 04:15:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:28,515 INFO L225 Difference]: With dead ends: 3532 [2024-11-14 04:15:28,516 INFO L226 Difference]: Without dead ends: 2870 [2024-11-14 04:15:28,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 297 SyntacticMatches, 6 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 48436 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=11478, Invalid=108584, Unknown=0, NotChecked=0, Total=120062 [2024-11-14 04:15:28,535 INFO L432 NwaCegarLoop]: 284 mSDtfsCounter, 5824 mSDsluCounter, 4618 mSDsCounter, 0 mSdLazyCounter, 6790 mSolverCounterSat, 2298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5825 SdHoareTripleChecker+Valid, 4902 SdHoareTripleChecker+Invalid, 9088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2298 IncrementalHoareTripleChecker+Valid, 6790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:28,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5825 Valid, 4902 Invalid, 9088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2298 Valid, 6790 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 04:15:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2024-11-14 04:15:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1868. [2024-11-14 04:15:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1446 states have (on average 1.3326417704011064) internal successors, (1927), 1465 states have internal predecessors, (1927), 250 states have call successors, (250), 150 states have call predecessors, (250), 170 states have return successors, (337), 254 states have call predecessors, (337), 247 states have call successors, (337) [2024-11-14 04:15:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2514 transitions. [2024-11-14 04:15:28,939 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2514 transitions. Word has length 114 [2024-11-14 04:15:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:28,940 INFO L471 AbstractCegarLoop]: Abstraction has 1868 states and 2514 transitions. [2024-11-14 04:15:28,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 04:15:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2514 transitions. [2024-11-14 04:15:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 04:15:28,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:28,945 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:15:28,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:15:29,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:15:29,149 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:29,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1802086775, now seen corresponding path program 1 times [2024-11-14 04:15:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:29,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503197050] [2024-11-14 04:15:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:15:29,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503197050] [2024-11-14 04:15:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503197050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:15:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950021466] [2024-11-14 04:15:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:15:29,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:15:29,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:15:29,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:15:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:29,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:15:29,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:15:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:15:29,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:15:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 04:15:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950021466] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:15:29,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:15:29,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 04:15:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529216836] [2024-11-14 04:15:29,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:15:29,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:15:29,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:15:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:15:29,927 INFO L87 Difference]: Start difference. First operand 1868 states and 2514 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:15:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:31,103 INFO L93 Difference]: Finished difference Result 3101 states and 3942 transitions. [2024-11-14 04:15:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:15:31,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-14 04:15:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:31,116 INFO L225 Difference]: With dead ends: 3101 [2024-11-14 04:15:31,116 INFO L226 Difference]: Without dead ends: 2270 [2024-11-14 04:15:31,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:15:31,119 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 560 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:31,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 617 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:15:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2024-11-14 04:15:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2018. [2024-11-14 04:15:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1536 states have (on average 1.3203125) internal successors, (2028), 1561 states have internal predecessors, (2028), 279 states have call successors, (279), 169 states have call predecessors, (279), 201 states have return successors, (396), 289 states have call predecessors, (396), 276 states have call successors, (396) [2024-11-14 04:15:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2703 transitions. [2024-11-14 04:15:31,569 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2703 transitions. Word has length 115 [2024-11-14 04:15:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:31,570 INFO L471 AbstractCegarLoop]: Abstraction has 2018 states and 2703 transitions. [2024-11-14 04:15:31,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:15:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2703 transitions. [2024-11-14 04:15:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:15:31,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:31,574 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:15:31,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:15:31,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:15:31,775 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:31,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash 256567969, now seen corresponding path program 1 times [2024-11-14 04:15:31,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:31,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468741398] [2024-11-14 04:15:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:15:32,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:32,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468741398] [2024-11-14 04:15:32,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468741398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:15:32,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781855220] [2024-11-14 04:15:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:32,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:15:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:15:32,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:15:32,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:15:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:32,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:15:32,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:15:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:15:33,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:15:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 04:15:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781855220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:15:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873068201] [2024-11-14 04:15:34,872 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 04:15:34,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:15:34,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:15:34,872 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:15:34,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:15:58,005 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 261 for LOIs [2024-11-14 04:15:58,333 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 04:15:58,356 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 04:15:58,359 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2024-11-14 04:15:59,974 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 226 for LOIs [2024-11-14 04:16:01,362 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 04:16:01,387 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 219 for LOIs [2024-11-14 04:16:01,630 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 230 for LOIs [2024-11-14 04:16:01,884 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:23,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83680#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (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) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (exists ((v_~q_req_up~0_99 Int) (v_~q_free~0_100 Int)) (and (or (and (= v_~q_free~0_100 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_100 1) (= ~p_dw_st~0 0))) (or (exists ((v_~p_dw_st~0_138 Int) (v_~p_dw_pc~0_47 Int)) (and (or (and (= v_~p_dw_st~0_138 1) (= v_~p_dw_pc~0_47 0)) (and (<= ~q_buf_0~0 2147483647) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~p_dw_st~0_138 1) (= v_~q_req_up~0_99 1))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_69| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483648)))) (= v_~p_dw_pc~0_47 0)) (and (= v_~p_dw_pc~0_47 1) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_69| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483648)))))))) (= ~p_dw_st~0 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-14 04:16:23,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:23,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:16:23,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 04:16:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450819545] [2024-11-14 04:16:23,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:23,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:16:23,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:23,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:16:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:16:23,162 INFO L87 Difference]: Start difference. First operand 2018 states and 2703 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 04:16:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:31,635 INFO L93 Difference]: Finished difference Result 3857 states and 4860 transitions. [2024-11-14 04:16:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-14 04:16:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 04:16:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:31,653 INFO L225 Difference]: With dead ends: 3857 [2024-11-14 04:16:31,653 INFO L226 Difference]: Without dead ends: 2876 [2024-11-14 04:16:31,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 14109 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=3874, Invalid=32416, Unknown=0, NotChecked=0, Total=36290 [2024-11-14 04:16:31,661 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 5463 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 4836 mSolverCounterSat, 2483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5463 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 7319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2483 IncrementalHoareTripleChecker+Valid, 4836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:31,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5463 Valid, 3385 Invalid, 7319 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2483 Valid, 4836 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 04:16:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2024-11-14 04:16:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1734. [2024-11-14 04:16:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1360 states have (on average 1.3455882352941178) internal successors, (1830), 1373 states have internal predecessors, (1830), 231 states have call successors, (231), 129 states have call predecessors, (231), 141 states have return successors, (312), 233 states have call predecessors, (312), 228 states have call successors, (312) [2024-11-14 04:16:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2373 transitions. [2024-11-14 04:16:32,125 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2373 transitions. Word has length 124 [2024-11-14 04:16:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:32,128 INFO L471 AbstractCegarLoop]: Abstraction has 1734 states and 2373 transitions. [2024-11-14 04:16:32,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 04:16:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2373 transitions. [2024-11-14 04:16:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 04:16:32,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:32,133 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:32,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:16:32,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:16:32,334 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:32,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1668740950, now seen corresponding path program 1 times [2024-11-14 04:16:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300878384] [2024-11-14 04:16:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:16:32,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300878384] [2024-11-14 04:16:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300878384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:32,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001251251] [2024-11-14 04:16:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:32,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:32,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:32,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:16:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:32,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:16:32,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 04:16:32,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:16:33,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001251251] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:33,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:16:33,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 04:16:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747383695] [2024-11-14 04:16:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:33,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:16:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:16:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:16:33,182 INFO L87 Difference]: Start difference. First operand 1734 states and 2373 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:16:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:34,508 INFO L93 Difference]: Finished difference Result 2187 states and 2882 transitions. [2024-11-14 04:16:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:16:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-14 04:16:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:34,519 INFO L225 Difference]: With dead ends: 2187 [2024-11-14 04:16:34,519 INFO L226 Difference]: Without dead ends: 1490 [2024-11-14 04:16:34,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:16:34,522 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 788 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:34,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 924 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:16:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-11-14 04:16:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1460. [2024-11-14 04:16:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1156 states have (on average 1.3693771626297577) internal successors, (1583), 1169 states have internal predecessors, (1583), 195 states have call successors, (195), 99 states have call predecessors, (195), 107 states have return successors, (271), 193 states have call predecessors, (271), 192 states have call successors, (271) [2024-11-14 04:16:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2049 transitions. [2024-11-14 04:16:34,852 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2049 transitions. Word has length 125 [2024-11-14 04:16:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:34,853 INFO L471 AbstractCegarLoop]: Abstraction has 1460 states and 2049 transitions. [2024-11-14 04:16:34,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 04:16:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2049 transitions. [2024-11-14 04:16:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:34,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:34,858 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:34,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:16:35,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:35,059 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:35,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash -231018789, now seen corresponding path program 1 times [2024-11-14 04:16:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096622550] [2024-11-14 04:16:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:35,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096622550] [2024-11-14 04:16:35,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096622550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894264425] [2024-11-14 04:16:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:35,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:35,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:16:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:35,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:35,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:16:35,526 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894264425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:35,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:35,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973653374] [2024-11-14 04:16:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:35,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:35,528 INFO L87 Difference]: Start difference. First operand 1460 states and 2049 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:36,015 INFO L93 Difference]: Finished difference Result 3324 states and 5091 transitions. [2024-11-14 04:16:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:36,033 INFO L225 Difference]: With dead ends: 3324 [2024-11-14 04:16:36,033 INFO L226 Difference]: Without dead ends: 2384 [2024-11-14 04:16:36,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:36,039 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 366 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:36,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2024-11-14 04:16:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2375. [2024-11-14 04:16:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1939 states have (on average 1.4146467251160393) internal successors, (2743), 1955 states have internal predecessors, (2743), 297 states have call successors, (297), 129 states have call predecessors, (297), 137 states have return successors, (431), 292 states have call predecessors, (431), 294 states have call successors, (431) [2024-11-14 04:16:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3471 transitions. [2024-11-14 04:16:36,548 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3471 transitions. Word has length 138 [2024-11-14 04:16:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:36,549 INFO L471 AbstractCegarLoop]: Abstraction has 2375 states and 3471 transitions. [2024-11-14 04:16:36,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3471 transitions. [2024-11-14 04:16:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:36,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:36,558 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:36,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:16:36,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:36,758 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:36,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash -79741445, now seen corresponding path program 1 times [2024-11-14 04:16:36,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:36,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574493462] [2024-11-14 04:16:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:36,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:36,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574493462] [2024-11-14 04:16:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574493462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398773238] [2024-11-14 04:16:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:36,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:36,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:16:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:37,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:37,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 04:16:37,268 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398773238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:37,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434938577] [2024-11-14 04:16:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:37,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:37,270 INFO L87 Difference]: Start difference. First operand 2375 states and 3471 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:37,989 INFO L93 Difference]: Finished difference Result 6054 states and 9449 transitions. [2024-11-14 04:16:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:38,008 INFO L225 Difference]: With dead ends: 6054 [2024-11-14 04:16:38,008 INFO L226 Difference]: Without dead ends: 4199 [2024-11-14 04:16:38,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:38,020 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 357 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:38,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2024-11-14 04:16:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4185. [2024-11-14 04:16:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3490 states have (on average 1.4421203438395416) internal successors, (5033), 3512 states have internal predecessors, (5033), 496 states have call successors, (496), 189 states have call predecessors, (496), 197 states have return successors, (742), 485 states have call predecessors, (742), 493 states have call successors, (742) [2024-11-14 04:16:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6271 transitions. [2024-11-14 04:16:38,550 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6271 transitions. Word has length 138 [2024-11-14 04:16:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:38,551 INFO L471 AbstractCegarLoop]: Abstraction has 4185 states and 6271 transitions. [2024-11-14 04:16:38,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6271 transitions. [2024-11-14 04:16:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:38,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:38,561 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:38,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:38,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:16:38,762 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:38,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1745917221, now seen corresponding path program 1 times [2024-11-14 04:16:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523760001] [2024-11-14 04:16:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:38,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:38,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523760001] [2024-11-14 04:16:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523760001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21262532] [2024-11-14 04:16:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:38,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:38,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:38,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:16:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:39,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:39,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:16:39,261 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21262532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:39,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:39,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662278470] [2024-11-14 04:16:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:39,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:39,264 INFO L87 Difference]: Start difference. First operand 4185 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:40,451 INFO L93 Difference]: Finished difference Result 11454 states and 18024 transitions. [2024-11-14 04:16:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:40,497 INFO L225 Difference]: With dead ends: 11454 [2024-11-14 04:16:40,497 INFO L226 Difference]: Without dead ends: 7789 [2024-11-14 04:16:40,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:40,520 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 363 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:40,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2024-11-14 04:16:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 7765. [2024-11-14 04:16:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7765 states, 6562 states have (on average 1.455806156659555) internal successors, (9553), 6596 states have internal predecessors, (9553), 884 states have call successors, (884), 309 states have call predecessors, (884), 317 states have return successors, (1346), 861 states have call predecessors, (1346), 881 states have call successors, (1346) [2024-11-14 04:16:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7765 states to 7765 states and 11783 transitions. [2024-11-14 04:16:41,542 INFO L78 Accepts]: Start accepts. Automaton has 7765 states and 11783 transitions. Word has length 138 [2024-11-14 04:16:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:41,543 INFO L471 AbstractCegarLoop]: Abstraction has 7765 states and 11783 transitions. [2024-11-14 04:16:41,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7765 states and 11783 transitions. [2024-11-14 04:16:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:41,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:41,556 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:41,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:41,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 04:16:41,761 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:41,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash -868061253, now seen corresponding path program 1 times [2024-11-14 04:16:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030672907] [2024-11-14 04:16:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:41,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030672907] [2024-11-14 04:16:41,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030672907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237891955] [2024-11-14 04:16:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:41,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:41,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:41,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:16:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:42,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:42,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:16:42,249 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237891955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:42,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:42,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706899320] [2024-11-14 04:16:42,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:42,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:42,253 INFO L87 Difference]: Start difference. First operand 7765 states and 11783 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:43,569 INFO L93 Difference]: Finished difference Result 22134 states and 34892 transitions. [2024-11-14 04:16:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:43,654 INFO L225 Difference]: With dead ends: 22134 [2024-11-14 04:16:43,654 INFO L226 Difference]: Without dead ends: 14889 [2024-11-14 04:16:43,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:43,690 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 345 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:43,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14889 states. [2024-11-14 04:16:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14889 to 14845. [2024-11-14 04:16:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14845 states, 12646 states have (on average 1.4607781116558596) internal successors, (18473), 12704 states have internal predecessors, (18473), 1640 states have call successors, (1640), 549 states have call predecessors, (1640), 557 states have return successors, (2518), 1593 states have call predecessors, (2518), 1637 states have call successors, (2518) [2024-11-14 04:16:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14845 states to 14845 states and 22631 transitions. [2024-11-14 04:16:45,261 INFO L78 Accepts]: Start accepts. Automaton has 14845 states and 22631 transitions. Word has length 138 [2024-11-14 04:16:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:45,261 INFO L471 AbstractCegarLoop]: Abstraction has 14845 states and 22631 transitions. [2024-11-14 04:16:45,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14845 states and 22631 transitions. [2024-11-14 04:16:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:45,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:45,284 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:45,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 04:16:45,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:45,485 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:45,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1965485211, now seen corresponding path program 1 times [2024-11-14 04:16:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315366021] [2024-11-14 04:16:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:45,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:45,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315366021] [2024-11-14 04:16:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315366021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292204253] [2024-11-14 04:16:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:45,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:45,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:16:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:45,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:45,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:16:45,935 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292204253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911631538] [2024-11-14 04:16:45,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:45,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:45,939 INFO L87 Difference]: Start difference. First operand 14845 states and 22631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:48,726 INFO L93 Difference]: Finished difference Result 43254 states and 68064 transitions. [2024-11-14 04:16:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:48,875 INFO L225 Difference]: With dead ends: 43254 [2024-11-14 04:16:48,876 INFO L226 Difference]: Without dead ends: 28929 [2024-11-14 04:16:48,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:48,928 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 351 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:48,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:16:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28929 states. [2024-11-14 04:16:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28929 to 28845. [2024-11-14 04:16:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28845 states, 24694 states have (on average 1.4608001943792015) internal successors, (36073), 24800 states have internal predecessors, (36073), 3112 states have call successors, (3112), 1029 states have call predecessors, (3112), 1037 states have return successors, (4790), 3017 states have call predecessors, (4790), 3109 states have call successors, (4790) [2024-11-14 04:16:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28845 states to 28845 states and 43975 transitions. [2024-11-14 04:16:51,696 INFO L78 Accepts]: Start accepts. Automaton has 28845 states and 43975 transitions. Word has length 138 [2024-11-14 04:16:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:51,696 INFO L471 AbstractCegarLoop]: Abstraction has 28845 states and 43975 transitions. [2024-11-14 04:16:51,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28845 states and 43975 transitions. [2024-11-14 04:16:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:16:51,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:51,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:51,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:16:51,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:51,942 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:51,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1322106501, now seen corresponding path program 1 times [2024-11-14 04:16:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:51,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989295645] [2024-11-14 04:16:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:16:52,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:52,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989295645] [2024-11-14 04:16:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989295645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:52,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382753224] [2024-11-14 04:16:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:52,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:52,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:16:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:52,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:16:52,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:16:52,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:16:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382753224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:16:52,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:16:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:16:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489000493] [2024-11-14 04:16:52,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:16:52,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:16:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:16:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:52,458 INFO L87 Difference]: Start difference. First operand 28845 states and 43975 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:16:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:57,347 INFO L93 Difference]: Finished difference Result 85014 states and 133280 transitions. [2024-11-14 04:16:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:16:57,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:16:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:57,616 INFO L225 Difference]: With dead ends: 85014 [2024-11-14 04:16:57,616 INFO L226 Difference]: Without dead ends: 56689 [2024-11-14 04:16:57,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:16:57,711 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 342 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:57,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:16:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56689 states. [2024-11-14 04:17:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56689 to 56525. [2024-11-14 04:17:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56525 states, 48550 states have (on average 1.4581462409886714) internal successors, (70793), 48752 states have internal predecessors, (70793), 5976 states have call successors, (5976), 1989 states have call predecessors, (5976), 1997 states have return successors, (9190), 5785 states have call predecessors, (9190), 5973 states have call successors, (9190) [2024-11-14 04:17:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56525 states to 56525 states and 85959 transitions. [2024-11-14 04:17:02,983 INFO L78 Accepts]: Start accepts. Automaton has 56525 states and 85959 transitions. Word has length 138 [2024-11-14 04:17:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:02,984 INFO L471 AbstractCegarLoop]: Abstraction has 56525 states and 85959 transitions. [2024-11-14 04:17:02,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:17:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 56525 states and 85959 transitions. [2024-11-14 04:17:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:17:03,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:03,037 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:03,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:17:03,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a5114e-9d62-4ee1-8d6a-27be274cc277/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:03,238 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:03,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash 76148891, now seen corresponding path program 1 times [2024-11-14 04:17:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:03,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190270099] [2024-11-14 04:17:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 04:17:03,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:03,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190270099] [2024-11-14 04:17:03,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190270099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:03,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:17:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:17:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439755328] [2024-11-14 04:17:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:03,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:17:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:17:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:17:03,566 INFO L87 Difference]: Start difference. First operand 56525 states and 85959 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)