./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.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_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/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_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/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_756ac2f6-e3a4-4b54-84ac-c50f25610265/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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:49,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:49,212 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:49,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:49,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:49,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:49,258 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:49,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:49,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:49,260 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:49,261 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:49,262 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:49,263 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:49,263 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:49,264 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:49,265 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:49,266 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:49,266 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:49,267 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:49,268 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:49,269 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:49,270 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:49,271 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:49,272 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:49,272 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:49,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:49,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:49,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:49,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:49,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:49,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:49,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:49,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:49,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:49,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:49,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:49,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:49,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:49,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:49,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:49,295 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:49,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:49,297 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:49,297 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:49,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:49,298 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_756ac2f6-e3a4-4b54-84ac-c50f25610265/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2023-11-19 04:58:49,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:49,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:49,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:49,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:49,757 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:49,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-11-19 04:58:53,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:53,663 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:53,664 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-11-19 04:58:53,698 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/data/8e7d8222b/d81ec1ece77b48ef8e62372ac774cd2d/FLAG23354d7f1 [2023-11-19 04:58:53,714 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/data/8e7d8222b/d81ec1ece77b48ef8e62372ac774cd2d [2023-11-19 04:58:53,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:53,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:53,725 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:53,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:53,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:53,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:53" (1/1) ... [2023-11-19 04:58:53,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d440dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:53, skipping insertion in model container [2023-11-19 04:58:53,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:53" (1/1) ... [2023-11-19 04:58:53,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:54,448 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_756ac2f6-e3a4-4b54-84ac-c50f25610265/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2023-11-19 04:58:54,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:54,600 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:54,614 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [48] [2023-11-19 04:58:54,616 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [236] [2023-11-19 04:58:54,617 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [904] [2023-11-19 04:58:54,617 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1270] [2023-11-19 04:58:54,617 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1308] [2023-11-19 04:58:54,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1406] [2023-11-19 04:58:54,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1420] [2023-11-19 04:58:54,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1540] [2023-11-19 04:58:54,619 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1891] [2023-11-19 04:58:54,619 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1900] [2023-11-19 04:58:54,729 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_756ac2f6-e3a4-4b54-84ac-c50f25610265/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2023-11-19 04:58:54,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:54,905 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:54,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54 WrapperNode [2023-11-19 04:58:54,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:54,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:54,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:54,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:54,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:54,981 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,085 INFO L138 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 980 [2023-11-19 04:58:55,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:55,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:55,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:55,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:55,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,148 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,186 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:55,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:55,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:55,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:55,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (1/1) ... [2023-11-19 04:58:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:55,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:55,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:55,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_756ac2f6-e3a4-4b54-84ac-c50f25610265/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:58:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:58:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:58:55,330 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:58:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:58:55,330 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:58:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:58:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:58:55,332 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:58:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:58:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:58:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:58:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:58:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:58:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:58:55,336 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:58:55,336 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:58:55,337 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:58:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:58:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:58:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:58:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:58:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:58:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:58:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:58:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:58:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:58:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:58:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:58:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:58:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:58:55,343 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:58:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:58:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:58:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:58:55,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:58:55,344 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:58:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:58:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:58:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:58:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:58:55,345 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:58:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:58:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:58:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:58:55,346 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:58:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:58:55,347 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:58:55,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:55,348 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:58:55,349 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:58:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:55,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:55,350 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:58:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:58:55,351 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 04:58:55,351 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 04:58:55,588 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:55,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:57,252 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:58,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:58,521 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:58:58,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:58 BoogieIcfgContainer [2023-11-19 04:58:58,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:58,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:58,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:58,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:58,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:53" (1/3) ... [2023-11-19 04:58:58,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c2234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:58, skipping insertion in model container [2023-11-19 04:58:58,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:54" (2/3) ... [2023-11-19 04:58:58,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c2234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:58, skipping insertion in model container [2023-11-19 04:58:58,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:58" (3/3) ... [2023-11-19 04:58:58,559 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2023-11-19 04:58:58,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:58,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:58:58,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:58,711 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;@4e75a3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:58,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:58:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-19 04:58:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:58:58,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:58,741 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] [2023-11-19 04:58:58,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:58,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash -788683569, now seen corresponding path program 1 times [2023-11-19 04:58:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:58,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791421970] [2023-11-19 04:58:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:59,426 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 04:58:59,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791421970] [2023-11-19 04:58:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791421970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:59,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:59,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:58:59,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970570313] [2023-11-19 04:58:59,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:58:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:58:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:58:59,506 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 04:58:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:59,806 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2023-11-19 04:58:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:58:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-11-19 04:58:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:59,848 INFO L225 Difference]: With dead ends: 424 [2023-11-19 04:58:59,849 INFO L226 Difference]: Without dead ends: 402 [2023-11-19 04:58:59,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:58:59,860 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:59,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-19 04:58:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2023-11-19 04:59:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-19 04:59:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2023-11-19 04:59:00,014 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2023-11-19 04:59:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:00,018 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2023-11-19 04:59:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 04:59:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2023-11-19 04:59:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:59:00,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:00,032 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] [2023-11-19 04:59:00,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:59:00,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:00,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1547639527, now seen corresponding path program 1 times [2023-11-19 04:59:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931077906] [2023-11-19 04:59:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:00,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:00,863 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 04:59:00,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:00,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931077906] [2023-11-19 04:59:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931077906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:00,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:00,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:59:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552618436] [2023-11-19 04:59:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:00,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:59:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:59:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:00,885 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:59:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:03,636 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2023-11-19 04:59:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:59:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-11-19 04:59:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:03,651 INFO L225 Difference]: With dead ends: 1312 [2023-11-19 04:59:03,651 INFO L226 Difference]: Without dead ends: 926 [2023-11-19 04:59:03,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:59:03,669 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1288 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1015 Invalid, 1971 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [470 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 04:59:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-19 04:59:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2023-11-19 04:59:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2023-11-19 04:59:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2023-11-19 04:59:03,784 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2023-11-19 04:59:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:03,785 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2023-11-19 04:59:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:59:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2023-11-19 04:59:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:59:03,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:03,795 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:59:03,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:03,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1426151549, now seen corresponding path program 1 times [2023-11-19 04:59:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:03,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024630888] [2023-11-19 04:59:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:04,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:04,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024630888] [2023-11-19 04:59:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024630888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:04,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:04,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:59:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244022590] [2023-11-19 04:59:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:59:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:59:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:59:04,454 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 04:59:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:07,556 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2023-11-19 04:59:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:59:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2023-11-19 04:59:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:07,574 INFO L225 Difference]: With dead ends: 2617 [2023-11-19 04:59:07,574 INFO L226 Difference]: Without dead ends: 1795 [2023-11-19 04:59:07,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 04:59:07,583 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1222 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:07,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1657 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-19 04:59:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2023-11-19 04:59:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2023-11-19 04:59:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2023-11-19 04:59:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2023-11-19 04:59:07,770 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2023-11-19 04:59:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:07,771 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2023-11-19 04:59:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 04:59:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2023-11-19 04:59:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:59:07,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:07,777 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:59:07,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:07,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 802880066, now seen corresponding path program 1 times [2023-11-19 04:59:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:07,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426744626] [2023-11-19 04:59:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:08,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:08,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426744626] [2023-11-19 04:59:08,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426744626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:08,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:08,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:59:08,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123731757] [2023-11-19 04:59:08,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:59:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:59:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:59:08,353 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:59:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:12,897 INFO L93 Difference]: Finished difference Result 4684 states and 7540 transitions. [2023-11-19 04:59:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:59:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2023-11-19 04:59:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:12,924 INFO L225 Difference]: With dead ends: 4684 [2023-11-19 04:59:12,925 INFO L226 Difference]: Without dead ends: 2992 [2023-11-19 04:59:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:59:12,940 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1434 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4358 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 5041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 4358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:12,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2156 Invalid, 5041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [683 Valid, 4358 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 04:59:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2023-11-19 04:59:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2797. [2023-11-19 04:59:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 1921 states have (on average 1.5627277459656428) internal successors, (3002), 2020 states have internal predecessors, (3002), 711 states have call successors, (711), 144 states have call predecessors, (711), 164 states have return successors, (758), 676 states have call predecessors, (758), 706 states have call successors, (758) [2023-11-19 04:59:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4471 transitions. [2023-11-19 04:59:13,257 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4471 transitions. Word has length 91 [2023-11-19 04:59:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:13,259 INFO L495 AbstractCegarLoop]: Abstraction has 2797 states and 4471 transitions. [2023-11-19 04:59:13,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:59:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4471 transitions. [2023-11-19 04:59:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 04:59:13,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:13,263 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:59:13,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1374359642, now seen corresponding path program 1 times [2023-11-19 04:59:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:13,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915471] [2023-11-19 04:59:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:13,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:13,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915471] [2023-11-19 04:59:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:13,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:59:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030699049] [2023-11-19 04:59:13,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:13,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:59:13,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:59:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:13,679 INFO L87 Difference]: Start difference. First operand 2797 states and 4471 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 04:59:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:14,586 INFO L93 Difference]: Finished difference Result 2898 states and 4637 transitions. [2023-11-19 04:59:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:14,587 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2023-11-19 04:59:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:14,619 INFO L225 Difference]: With dead ends: 2898 [2023-11-19 04:59:14,619 INFO L226 Difference]: Without dead ends: 2883 [2023-11-19 04:59:14,623 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 04:59:14,627 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 721 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:14,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1933 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:59:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2023-11-19 04:59:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2803. [2023-11-19 04:59:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1927 states have (on average 1.5609756097560976) internal successors, (3008), 2026 states have internal predecessors, (3008), 711 states have call successors, (711), 144 states have call predecessors, (711), 164 states have return successors, (758), 676 states have call predecessors, (758), 706 states have call successors, (758) [2023-11-19 04:59:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4477 transitions. [2023-11-19 04:59:14,938 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4477 transitions. Word has length 92 [2023-11-19 04:59:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:14,939 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4477 transitions. [2023-11-19 04:59:14,940 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 04:59:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4477 transitions. [2023-11-19 04:59:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 04:59:14,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:14,949 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:59:14,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:14,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash -29377582, now seen corresponding path program 1 times [2023-11-19 04:59:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:14,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080020330] [2023-11-19 04:59:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:14,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:15,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080020330] [2023-11-19 04:59:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080020330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:15,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 04:59:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966759925] [2023-11-19 04:59:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:59:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:59:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:59:15,657 INFO L87 Difference]: Start difference. First operand 2803 states and 4477 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:59:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:22,484 INFO L93 Difference]: Finished difference Result 3228 states and 5119 transitions. [2023-11-19 04:59:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-19 04:59:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2023-11-19 04:59:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:22,513 INFO L225 Difference]: With dead ends: 3228 [2023-11-19 04:59:22,513 INFO L226 Difference]: Without dead ends: 3211 [2023-11-19 04:59:22,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:59:22,520 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 2771 mSDsluCounter, 3400 mSDsCounter, 0 mSdLazyCounter, 8547 mSolverCounterSat, 1526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2800 SdHoareTripleChecker+Valid, 3950 SdHoareTripleChecker+Invalid, 10073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1526 IncrementalHoareTripleChecker+Valid, 8547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:22,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2800 Valid, 3950 Invalid, 10073 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1526 Valid, 8547 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-19 04:59:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2023-11-19 04:59:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2991. [2023-11-19 04:59:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2069 states have (on average 1.5616239729337844) internal successors, (3231), 2166 states have internal predecessors, (3231), 728 states have call successors, (728), 174 states have call predecessors, (728), 193 states have return successors, (779), 694 states have call predecessors, (779), 723 states have call successors, (779) [2023-11-19 04:59:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4738 transitions. [2023-11-19 04:59:22,869 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4738 transitions. Word has length 97 [2023-11-19 04:59:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:22,870 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4738 transitions. [2023-11-19 04:59:22,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:59:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4738 transitions. [2023-11-19 04:59:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:59:22,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:22,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:59:22,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:22,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1515486588, now seen corresponding path program 1 times [2023-11-19 04:59:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:22,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996537031] [2023-11-19 04:59:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:22,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:23,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996537031] [2023-11-19 04:59:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996537031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914318962] [2023-11-19 04:59:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:23,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:23,226 INFO L87 Difference]: Start difference. First operand 2991 states and 4738 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 04:59:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:25,148 INFO L93 Difference]: Finished difference Result 8037 states and 12889 transitions. [2023-11-19 04:59:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2023-11-19 04:59:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:25,193 INFO L225 Difference]: With dead ends: 8037 [2023-11-19 04:59:25,194 INFO L226 Difference]: Without dead ends: 5066 [2023-11-19 04:59:25,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:25,216 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1231 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:25,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 702 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 04:59:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2023-11-19 04:59:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4691. [2023-11-19 04:59:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3252 states have (on average 1.556580565805658) internal successors, (5062), 3413 states have internal predecessors, (5062), 1131 states have call successors, (1131), 262 states have call predecessors, (1131), 307 states have return successors, (1262), 1075 states have call predecessors, (1262), 1126 states have call successors, (1262) [2023-11-19 04:59:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7455 transitions. [2023-11-19 04:59:25,853 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7455 transitions. Word has length 104 [2023-11-19 04:59:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:25,855 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 7455 transitions. [2023-11-19 04:59:25,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 04:59:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7455 transitions. [2023-11-19 04:59:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 04:59:25,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:25,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:59:25,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -264848079, now seen corresponding path program 1 times [2023-11-19 04:59:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367417320] [2023-11-19 04:59:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:26,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367417320] [2023-11-19 04:59:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367417320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:26,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:26,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:26,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986102653] [2023-11-19 04:59:26,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:26,302 INFO L87 Difference]: Start difference. First operand 4691 states and 7455 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 04:59:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:28,518 INFO L93 Difference]: Finished difference Result 13030 states and 21062 transitions. [2023-11-19 04:59:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2023-11-19 04:59:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:28,589 INFO L225 Difference]: With dead ends: 13030 [2023-11-19 04:59:28,590 INFO L226 Difference]: Without dead ends: 8362 [2023-11-19 04:59:28,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:28,691 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1218 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:28,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 715 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 04:59:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8362 states. [2023-11-19 04:59:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8362 to 7900. [2023-11-19 04:59:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 5490 states have (on average 1.5546448087431695) internal successors, (8535), 5792 states have internal predecessors, (8535), 1875 states have call successors, (1875), 438 states have call predecessors, (1875), 534 states have return successors, (2226), 1769 states have call predecessors, (2226), 1870 states have call successors, (2226) [2023-11-19 04:59:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 12636 transitions. [2023-11-19 04:59:29,661 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 12636 transitions. Word has length 105 [2023-11-19 04:59:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:29,662 INFO L495 AbstractCegarLoop]: Abstraction has 7900 states and 12636 transitions. [2023-11-19 04:59:29,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 04:59:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 12636 transitions. [2023-11-19 04:59:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:59:29,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:29,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:59:29,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:59:29,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:29,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 379355998, now seen corresponding path program 1 times [2023-11-19 04:59:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774871614] [2023-11-19 04:59:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:29,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774871614] [2023-11-19 04:59:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774871614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:29,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:29,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627758694] [2023-11-19 04:59:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:29,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:29,947 INFO L87 Difference]: Start difference. First operand 7900 states and 12636 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18)