./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ --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 bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:24:01,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:24:01,236 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:24:01,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:24:01,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:24:01,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:24:01,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:24:01,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:24:01,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:24:01,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:24:01,302 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:24:01,303 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:24:01,303 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:24:01,305 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:24:01,306 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:24:01,306 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:24:01,307 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:24:01,307 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:24:01,308 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:24:01,308 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:24:01,309 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:24:01,309 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:24:01,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:24:01,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:24:01,312 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:24:01,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:24:01,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:24:01,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:24:01,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:24:01,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:24:01,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:24:01,316 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:24:01,316 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:24:01,316 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:24:01,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:24:01,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:24:01,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:01,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:24:01,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:24:01,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:24:01,318 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:24:01,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:24:01,319 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:24:01,319 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:24:01,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:24:01,320 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 [2023-11-19 05:24:01,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:24:01,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:24:01,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:24:01,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:24:01,708 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:24:01,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-11-19 05:24:04,657 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:24:05,092 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:24:05,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2023-11-19 05:24:05,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/data/a770d67ce/cbbc22215ac64f1cae2bec05ecc45f7e/FLAG3c23099ec [2023-11-19 05:24:05,157 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/data/a770d67ce/cbbc22215ac64f1cae2bec05ecc45f7e [2023-11-19 05:24:05,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:24:05,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:24:05,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:05,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:24:05,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:24:05,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:05" (1/1) ... [2023-11-19 05:24:05,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255ef521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:05, skipping insertion in model container [2023-11-19 05:24:05,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:05" (1/1) ... [2023-11-19 05:24:05,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:24:05,528 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2023-11-19 05:24:05,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:05,940 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:24:05,950 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-19 05:24:05,952 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [62] [2023-11-19 05:24:05,952 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [71] [2023-11-19 05:24:05,953 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [235] [2023-11-19 05:24:05,953 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [903] [2023-11-19 05:24:05,954 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1263] [2023-11-19 05:24:05,955 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1355] [2023-11-19 05:24:05,955 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1390] [2023-11-19 05:24:05,956 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1756] [2023-11-19 05:24:05,956 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3289] [2023-11-19 05:24:05,959 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2023-11-19 05:24:06,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:06,076 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:24:06,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06 WrapperNode [2023-11-19 05:24:06,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:06,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:06,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:24:06,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:24:06,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,214 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 863 [2023-11-19 05:24:06,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:06,215 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:24:06,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:24:06,216 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:24:06,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:24:06,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:24:06,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:24:06,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:24:06,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (1/1) ... [2023-11-19 05:24:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:06,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:24:06,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:24:06,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:24:06,442 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:24:06,442 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:24:06,442 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:24:06,442 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:24:06,442 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:24:06,442 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:24:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:24:06,443 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:24:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:24:06,444 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:24:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:24:06,445 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:24:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:24:06,446 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:24:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:24:06,446 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:24:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:24:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:24:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:24:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:24:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:24:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:24:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:24:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:24:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:24:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:24:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:24:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:24:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:24:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:24:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:24:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:24:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:24:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:24:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:24:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:24:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-19 05:24:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-19 05:24:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:24:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:24:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:24:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:24:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:24:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:24:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:24:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:24:06,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:24:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:24:06,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:24:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:24:06,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:24:06,662 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:24:06,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:24:08,063 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:24:09,071 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:24:09,071 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:24:09,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:09 BoogieIcfgContainer [2023-11-19 05:24:09,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:24:09,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:24:09,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:24:09,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:24:09,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:05" (1/3) ... [2023-11-19 05:24:09,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100b25cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:09, skipping insertion in model container [2023-11-19 05:24:09,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:06" (2/3) ... [2023-11-19 05:24:09,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100b25cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:09, skipping insertion in model container [2023-11-19 05:24:09,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:09" (3/3) ... [2023-11-19 05:24:09,101 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2023-11-19 05:24:09,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:24:09,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:24:09,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:24:09,226 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e9922d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:24:09,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:24:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 05:24:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:24:09,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:09,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:09,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:09,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1477310696, now seen corresponding path program 1 times [2023-11-19 05:24:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31899617] [2023-11-19 05:24:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:09,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:10,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:10,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31899617] [2023-11-19 05:24:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31899617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:10,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:10,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:24:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245323302] [2023-11-19 05:24:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:10,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:24:10,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:24:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:24:10,482 INFO L87 Difference]: Start difference. First operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:24:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:11,207 INFO L93 Difference]: Finished difference Result 815 states and 1317 transitions. [2023-11-19 05:24:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2023-11-19 05:24:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:11,242 INFO L225 Difference]: With dead ends: 815 [2023-11-19 05:24:11,242 INFO L226 Difference]: Without dead ends: 463 [2023-11-19 05:24:11,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:11,260 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 249 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:11,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2158 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:24:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-19 05:24:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2023-11-19 05:24:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 248 states have (on average 1.5766129032258065) internal successors, (391), 267 states have internal predecessors, (391), 92 states have call successors, (92), 24 states have call predecessors, (92), 23 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-19 05:24:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 570 transitions. [2023-11-19 05:24:11,406 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 570 transitions. Word has length 65 [2023-11-19 05:24:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:11,408 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 570 transitions. [2023-11-19 05:24:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:24:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 570 transitions. [2023-11-19 05:24:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:24:11,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:11,419 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:11,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:24:11,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1090354602, now seen corresponding path program 1 times [2023-11-19 05:24:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556495039] [2023-11-19 05:24:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:12,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556495039] [2023-11-19 05:24:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556495039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:24:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100559122] [2023-11-19 05:24:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:12,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:24:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:12,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:24:12,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:24:12,132 INFO L87 Difference]: Start difference. First operand 364 states and 570 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 05:24:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:15,811 INFO L93 Difference]: Finished difference Result 1231 states and 1959 transitions. [2023-11-19 05:24:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 05:24:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 68 [2023-11-19 05:24:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:15,828 INFO L225 Difference]: With dead ends: 1231 [2023-11-19 05:24:15,828 INFO L226 Difference]: Without dead ends: 883 [2023-11-19 05:24:15,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:24:15,840 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1697 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:15,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 2137 Invalid, 3998 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [533 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-19 05:24:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-11-19 05:24:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2023-11-19 05:24:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 592 states have (on average 1.5962837837837838) internal successors, (945), 623 states have internal predecessors, (945), 193 states have call successors, (193), 48 states have call predecessors, (193), 52 states have return successors, (200), 191 states have call predecessors, (200), 188 states have call successors, (200) [2023-11-19 05:24:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1338 transitions. [2023-11-19 05:24:15,968 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1338 transitions. Word has length 68 [2023-11-19 05:24:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:15,969 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1338 transitions. [2023-11-19 05:24:15,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 05:24:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1338 transitions. [2023-11-19 05:24:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 05:24:15,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:15,979 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:24:15,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:15,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1512809148, now seen corresponding path program 1 times [2023-11-19 05:24:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:15,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226957453] [2023-11-19 05:24:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:15,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:16,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:16,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226957453] [2023-11-19 05:24:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226957453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:16,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:24:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863845923] [2023-11-19 05:24:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:16,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:24:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:24:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:16,469 INFO L87 Difference]: Start difference. First operand 838 states and 1338 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:24:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:16,790 INFO L93 Difference]: Finished difference Result 1399 states and 2241 transitions. [2023-11-19 05:24:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:24:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2023-11-19 05:24:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:16,802 INFO L225 Difference]: With dead ends: 1399 [2023-11-19 05:24:16,802 INFO L226 Difference]: Without dead ends: 905 [2023-11-19 05:24:16,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:16,813 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 30 mSDsluCounter, 2736 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:16,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3296 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-11-19 05:24:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 859. [2023-11-19 05:24:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 607 states have (on average 1.5815485996705108) internal successors, (960), 638 states have internal predecessors, (960), 193 states have call successors, (193), 48 states have call predecessors, (193), 58 states have return successors, (215), 197 states have call predecessors, (215), 188 states have call successors, (215) [2023-11-19 05:24:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1368 transitions. [2023-11-19 05:24:16,893 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1368 transitions. Word has length 72 [2023-11-19 05:24:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:16,896 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1368 transitions. [2023-11-19 05:24:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:24:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1368 transitions. [2023-11-19 05:24:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:24:16,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:16,902 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:16,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:24:16,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:16,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2004530486, now seen corresponding path program 1 times [2023-11-19 05:24:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110706072] [2023-11-19 05:24:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:17,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110706072] [2023-11-19 05:24:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110706072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:17,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:17,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:24:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216726494] [2023-11-19 05:24:17,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:24:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:24:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:17,260 INFO L87 Difference]: Start difference. First operand 859 states and 1368 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:24:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:17,521 INFO L93 Difference]: Finished difference Result 1428 states and 2279 transitions. [2023-11-19 05:24:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:24:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 73 [2023-11-19 05:24:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:17,530 INFO L225 Difference]: With dead ends: 1428 [2023-11-19 05:24:17,530 INFO L226 Difference]: Without dead ends: 920 [2023-11-19 05:24:17,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:17,534 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 30 mSDsluCounter, 2736 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:17,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3296 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-11-19 05:24:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 862. [2023-11-19 05:24:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 610 states have (on average 1.5786885245901638) internal successors, (963), 638 states have internal predecessors, (963), 193 states have call successors, (193), 48 states have call predecessors, (193), 58 states have return successors, (215), 200 states have call predecessors, (215), 188 states have call successors, (215) [2023-11-19 05:24:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1371 transitions. [2023-11-19 05:24:17,598 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1371 transitions. Word has length 73 [2023-11-19 05:24:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:17,598 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1371 transitions. [2023-11-19 05:24:17,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:24:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1371 transitions. [2023-11-19 05:24:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:24:17,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:17,602 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:17,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:24:17,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:17,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash -118495402, now seen corresponding path program 1 times [2023-11-19 05:24:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:17,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128540180] [2023-11-19 05:24:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:18,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128540180] [2023-11-19 05:24:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128540180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:24:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257231676] [2023-11-19 05:24:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:18,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:24:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:24:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:18,952 INFO L87 Difference]: Start difference. First operand 862 states and 1371 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 05:24:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:23,889 INFO L93 Difference]: Finished difference Result 3734 states and 6061 transitions. [2023-11-19 05:24:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:24:23,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 73 [2023-11-19 05:24:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:23,913 INFO L225 Difference]: With dead ends: 3734 [2023-11-19 05:24:23,913 INFO L226 Difference]: Without dead ends: 2889 [2023-11-19 05:24:23,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:24:23,920 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 2527 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:23,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2626 Valid, 1419 Invalid, 3511 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1129 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-19 05:24:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2023-11-19 05:24:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2617. [2023-11-19 05:24:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 1846 states have (on average 1.573131094257855) internal successors, (2904), 1950 states have internal predecessors, (2904), 607 states have call successors, (607), 129 states have call predecessors, (607), 163 states have return successors, (697), 608 states have call predecessors, (697), 602 states have call successors, (697) [2023-11-19 05:24:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 4208 transitions. [2023-11-19 05:24:24,292 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 4208 transitions. Word has length 73 [2023-11-19 05:24:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:24,292 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 4208 transitions. [2023-11-19 05:24:24,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 05:24:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 4208 transitions. [2023-11-19 05:24:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 05:24:24,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:24,296 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:24:24,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:24,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1928370188, now seen corresponding path program 1 times [2023-11-19 05:24:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:24,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030547160] [2023-11-19 05:24:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:24,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:24,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:24,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030547160] [2023-11-19 05:24:24,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030547160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:24,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:24,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:24:24,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782601940] [2023-11-19 05:24:24,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:24:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:24:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:24:24,715 INFO L87 Difference]: Start difference. First operand 2617 states and 4208 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-19 05:24:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:27,363 INFO L93 Difference]: Finished difference Result 5834 states and 9425 transitions. [2023-11-19 05:24:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 79 [2023-11-19 05:24:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:27,409 INFO L225 Difference]: With dead ends: 5834 [2023-11-19 05:24:27,409 INFO L226 Difference]: Without dead ends: 3905 [2023-11-19 05:24:27,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:24:27,423 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1321 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:27,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 1390 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 05:24:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2023-11-19 05:24:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3773. [2023-11-19 05:24:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 2615 states have (on average 1.530019120458891) internal successors, (4001), 2778 states have internal predecessors, (4001), 899 states have call successors, (899), 211 states have call predecessors, (899), 258 states have return successors, (1058), 889 states have call predecessors, (1058), 894 states have call successors, (1058) [2023-11-19 05:24:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5958 transitions. [2023-11-19 05:24:28,025 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5958 transitions. Word has length 79 [2023-11-19 05:24:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:28,025 INFO L495 AbstractCegarLoop]: Abstraction has 3773 states and 5958 transitions. [2023-11-19 05:24:28,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-19 05:24:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5958 transitions. [2023-11-19 05:24:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:24:28,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:28,033 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:24:28,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 759991927, now seen corresponding path program 1 times [2023-11-19 05:24:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727145809] [2023-11-19 05:24:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:28,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727145809] [2023-11-19 05:24:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727145809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:24:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582748186] [2023-11-19 05:24:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:28,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:24:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:24:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:28,385 INFO L87 Difference]: Start difference. First operand 3773 states and 5958 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 05:24:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:30,975 INFO L93 Difference]: Finished difference Result 6996 states and 11083 transitions. [2023-11-19 05:24:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:24:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2023-11-19 05:24:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:31,018 INFO L225 Difference]: With dead ends: 6996 [2023-11-19 05:24:31,018 INFO L226 Difference]: Without dead ends: 4136 [2023-11-19 05:24:31,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:24:31,041 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 955 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:31,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1370 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 05:24:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2023-11-19 05:24:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3854. [2023-11-19 05:24:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 2669 states have (on average 1.5237916822780067) internal successors, (4067), 2844 states have internal predecessors, (4067), 902 states have call successors, (902), 226 states have call predecessors, (902), 282 states have return successors, (1092), 889 states have call predecessors, (1092), 897 states have call successors, (1092) [2023-11-19 05:24:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6061 transitions. [2023-11-19 05:24:31,687 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6061 transitions. Word has length 81 [2023-11-19 05:24:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:31,687 INFO L495 AbstractCegarLoop]: Abstraction has 3854 states and 6061 transitions. [2023-11-19 05:24:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 05:24:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6061 transitions. [2023-11-19 05:24:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-19 05:24:31,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:31,692 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:31,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:24:31,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:31,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1894929992, now seen corresponding path program 1 times [2023-11-19 05:24:31,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:31,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944011475] [2023-11-19 05:24:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:32,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944011475] [2023-11-19 05:24:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944011475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:32,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:32,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436273231] [2023-11-19 05:24:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:32,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:32,054 INFO L87 Difference]: Start difference. First operand 3854 states and 6061 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:24:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:33,206 INFO L93 Difference]: Finished difference Result 3958 states and 6223 transitions. [2023-11-19 05:24:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 85 [2023-11-19 05:24:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:33,240 INFO L225 Difference]: With dead ends: 3958 [2023-11-19 05:24:33,240 INFO L226 Difference]: Without dead ends: 3943 [2023-11-19 05:24:33,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:24:33,246 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 661 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:33,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1741 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:24:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2023-11-19 05:24:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3860. [2023-11-19 05:24:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 2675 states have (on average 1.5226168224299066) internal successors, (4073), 2850 states have internal predecessors, (4073), 902 states have call successors, (902), 226 states have call predecessors, (902), 282 states have return successors, (1092), 889 states have call predecessors, (1092), 897 states have call successors, (1092) [2023-11-19 05:24:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 6067 transitions. [2023-11-19 05:24:33,808 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 6067 transitions. Word has length 85 [2023-11-19 05:24:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:33,808 INFO L495 AbstractCegarLoop]: Abstraction has 3860 states and 6067 transitions. [2023-11-19 05:24:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:24:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 6067 transitions. [2023-11-19 05:24:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:24:33,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:33,813 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:33,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:24:33,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:33,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash 538627030, now seen corresponding path program 1 times [2023-11-19 05:24:33,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:33,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235295598] [2023-11-19 05:24:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:33,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:34,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:34,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235295598] [2023-11-19 05:24:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235295598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:24:34,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686541261] [2023-11-19 05:24:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:24:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:24:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:24:34,159 INFO L87 Difference]: Start difference. First operand 3860 states and 6067 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:24:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:35,110 INFO L93 Difference]: Finished difference Result 7238 states and 11534 transitions. [2023-11-19 05:24:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:24:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2023-11-19 05:24:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:35,142 INFO L225 Difference]: With dead ends: 7238 [2023-11-19 05:24:35,143 INFO L226 Difference]: Without dead ends: 4070 [2023-11-19 05:24:35,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:24:35,163 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 358 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 3844 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 3844 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2023-11-19 05:24:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 4060. [2023-11-19 05:24:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2861 states have (on average 1.5005242922055226) internal successors, (4293), 3040 states have internal predecessors, (4293), 907 states have call successors, (907), 231 states have call predecessors, (907), 291 states have return successors, (1095), 894 states have call predecessors, (1095), 902 states have call successors, (1095) [2023-11-19 05:24:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6295 transitions. [2023-11-19 05:24:35,704 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6295 transitions. Word has length 91 [2023-11-19 05:24:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:35,704 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6295 transitions. [2023-11-19 05:24:35,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:24:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6295 transitions. [2023-11-19 05:24:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 05:24:35,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:35,708 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:24:35,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:35,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1955515121, now seen corresponding path program 1 times [2023-11-19 05:24:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186182673] [2023-11-19 05:24:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:24:37,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186182673] [2023-11-19 05:24:37,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186182673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966581394] [2023-11-19 05:24:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:37,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:24:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:37,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:24:37,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:37,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:37,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966581394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:37,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:37,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2023-11-19 05:24:37,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397541663] [2023-11-19 05:24:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:37,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:24:37,582 INFO L87 Difference]: Start difference. First operand 4060 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:24:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:38,514 INFO L93 Difference]: Finished difference Result 10905 states and 17049 transitions. [2023-11-19 05:24:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-19 05:24:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:38,561 INFO L225 Difference]: With dead ends: 10905 [2023-11-19 05:24:38,562 INFO L226 Difference]: Without dead ends: 6864 [2023-11-19 05:24:38,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:24:38,582 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 518 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:38,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1095 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:24:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6864 states. [2023-11-19 05:24:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6864 to 6748. [2023-11-19 05:24:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 4807 states have (on average 1.5113376326190973) internal successors, (7265), 5115 states have internal predecessors, (7265), 1461 states have call successors, (1461), 375 states have call predecessors, (1461), 479 states have return successors, (1826), 1396 states have call predecessors, (1826), 1456 states have call successors, (1826) [2023-11-19 05:24:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 10552 transitions. [2023-11-19 05:24:39,475 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 10552 transitions. Word has length 97 [2023-11-19 05:24:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:39,476 INFO L495 AbstractCegarLoop]: Abstraction has 6748 states and 10552 transitions. [2023-11-19 05:24:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:24:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 10552 transitions. [2023-11-19 05:24:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-19 05:24:39,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:39,481 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:39,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:39,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:24:39,702 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:39,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash -491555675, now seen corresponding path program 1 times [2023-11-19 05:24:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771691919] [2023-11-19 05:24:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:24:41,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771691919] [2023-11-19 05:24:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771691919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304989082] [2023-11-19 05:24:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:41,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:41,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:41,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:41,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:24:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:41,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:24:41,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:24:41,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:41,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304989082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:41,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:41,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2023-11-19 05:24:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533552045] [2023-11-19 05:24:41,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:24:41,770 INFO L87 Difference]: Start difference. First operand 6748 states and 10552 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:24:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:42,933 INFO L93 Difference]: Finished difference Result 18968 states and 29945 transitions. [2023-11-19 05:24:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2023-11-19 05:24:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:43,035 INFO L225 Difference]: With dead ends: 18968 [2023-11-19 05:24:43,035 INFO L226 Difference]: Without dead ends: 12242 [2023-11-19 05:24:43,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:24:43,083 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 517 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:43,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1112 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:24:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12242 states. [2023-11-19 05:24:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 12125. [2023-11-19 05:24:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12125 states, 8700 states have (on average 1.5175862068965518) internal successors, (13203), 9266 states have internal predecessors, (13203), 2569 states have call successors, (2569), 663 states have call predecessors, (2569), 855 states have return successors, (3360), 2400 states have call predecessors, (3360), 2564 states have call successors, (3360) [2023-11-19 05:24:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12125 states to 12125 states and 19132 transitions. [2023-11-19 05:24:44,715 INFO L78 Accepts]: Start accepts. Automaton has 12125 states and 19132 transitions. Word has length 98 [2023-11-19 05:24:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:44,716 INFO L495 AbstractCegarLoop]: Abstraction has 12125 states and 19132 transitions. [2023-11-19 05:24:44,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:24:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 12125 states and 19132 transitions. [2023-11-19 05:24:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 05:24:44,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:44,720 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:44,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:44,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373f33e9-d7f6-43fd-91d3-b89a5d691c33/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:24:44,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:44,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash -647025419, now seen corresponding path program 1 times [2023-11-19 05:24:44,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:44,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156861311] [2023-11-19 05:24:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:44,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat