./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/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_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91 --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 0.2.4-dev-0e0057c [2023-11-25 00:03:30,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:30,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:03:30,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:30,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:30,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:30,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:30,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:30,406 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:30,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:30,412 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:30,412 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:30,413 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:30,414 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:30,415 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:30,415 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:30,416 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:30,416 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:30,416 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:30,417 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:30,417 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:30,418 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:30,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:30,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:30,420 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:03:30,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:30,421 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:03:30,421 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:30,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:30,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:30,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:30,423 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:03:30,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:30,424 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:30,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:30,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:30,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:30,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:30,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:30,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:30,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:30,426 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:30,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:30,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:30,427 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:30,427 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:30,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:30,428 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_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2023-11-25 00:03:30,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:30,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:30,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:30,774 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:30,775 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:30,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-11-25 00:03:34,339 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:34,790 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:34,791 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-11-25 00:03:34,824 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/data/753dc5105/9f26b99d9b064d98889be9f4e321dde5/FLAG1184c3b4e [2023-11-25 00:03:34,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/data/753dc5105/9f26b99d9b064d98889be9f4e321dde5 [2023-11-25 00:03:34,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:34,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:34,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:34,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:34,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:34,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:34" (1/1) ... [2023-11-25 00:03:34,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4cc3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:34, skipping insertion in model container [2023-11-25 00:03:34,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:34" (1/1) ... [2023-11-25 00:03:34,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:35,604 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_f8f5d4b0-5156-4948-857f-1b7bac06c46b/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2023-11-25 00:03:35,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:35,760 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:35,774 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [48] [2023-11-25 00:03:35,776 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [236] [2023-11-25 00:03:35,777 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [904] [2023-11-25 00:03:35,777 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1270] [2023-11-25 00:03:35,778 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1308] [2023-11-25 00:03:35,778 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1406] [2023-11-25 00:03:35,778 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1420] [2023-11-25 00:03:35,779 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1540] [2023-11-25 00:03:35,779 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1891] [2023-11-25 00:03:35,779 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1900] [2023-11-25 00:03:35,853 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_f8f5d4b0-5156-4948-857f-1b7bac06c46b/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2023-11-25 00:03:36,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:36,056 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:36,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36 WrapperNode [2023-11-25 00:03:36,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:36,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:36,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:36,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:36,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,198 INFO L138 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 980 [2023-11-25 00:03:36,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:36,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:36,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:36,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:36,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,285 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:36,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:36,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:36,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:36,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (1/1) ... [2023-11-25 00:03:36,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:36,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:36,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:36,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8f5d4b0-5156-4948-857f-1b7bac06c46b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:36,458 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-25 00:03:36,458 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-25 00:03:36,459 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:03:36,459 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:03:36,459 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:03:36,460 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:03:36,461 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-25 00:03:36,461 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-25 00:03:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:03:36,462 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:03:36,462 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:03:36,463 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:03:36,465 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:03:36,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:03:36,466 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-25 00:03:36,466 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-25 00:03:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:03:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:03:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:03:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:03:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:03:36,471 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:03:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:03:36,473 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:03:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-25 00:03:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-25 00:03:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-25 00:03:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-25 00:03:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:03:36,475 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:03:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:03:36,475 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:03:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-25 00:03:36,476 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-25 00:03:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-25 00:03:36,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-25 00:03:36,476 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:03:36,477 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:03:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:03:36,477 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:03:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:03:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:03:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:03:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:03:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:03:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:03:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:03:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:03:36,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:36,482 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:03:36,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:03:36,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:36,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:36,483 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:03:36,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:03:36,484 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-25 00:03:36,484 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-25 00:03:36,766 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:36,771 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:38,272 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:39,337 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:39,337 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:03:39,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:39 BoogieIcfgContainer [2023-11-25 00:03:39,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:39,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:39,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:39,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:39,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:34" (1/3) ... [2023-11-25 00:03:39,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf2e2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:39, skipping insertion in model container [2023-11-25 00:03:39,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:36" (2/3) ... [2023-11-25 00:03:39,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf2e2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:39, skipping insertion in model container [2023-11-25 00:03:39,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:39" (3/3) ... [2023-11-25 00:03:39,351 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2023-11-25 00:03:39,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:39,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:03:39,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:39,468 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;@a455d5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:39,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:03:39,475 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) [2023-11-25 00:03:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-25 00:03:39,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:39,489 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] [2023-11-25 00:03:39,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:39,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1177719551, now seen corresponding path program 1 times [2023-11-25 00:03:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:39,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482693615] [2023-11-25 00:03:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:40,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:40,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482693615] [2023-11-25 00:03:40,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482693615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:40,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:40,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:03:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403662260] [2023-11-25 00:03:40,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:40,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:03:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:03:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:03:40,079 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) [2023-11-25 00:03:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:40,302 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2023-11-25 00:03:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:03:40,305 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 [2023-11-25 00:03:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:40,333 INFO L225 Difference]: With dead ends: 424 [2023-11-25 00:03:40,333 INFO L226 Difference]: Without dead ends: 402 [2023-11-25 00:03:40,339 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 [2023-11-25 00:03:40,343 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 [2023-11-25 00:03:40,344 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] [2023-11-25 00:03:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-25 00:03:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2023-11-25 00:03:40,428 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) [2023-11-25 00:03:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2023-11-25 00:03:40,438 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2023-11-25 00:03:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:40,440 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2023-11-25 00:03:40,440 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) [2023-11-25 00:03:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2023-11-25 00:03:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-25 00:03:40,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:40,445 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] [2023-11-25 00:03:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:03:40,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2124191807, now seen corresponding path program 1 times [2023-11-25 00:03:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137732325] [2023-11-25 00:03:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:41,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:41,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137732325] [2023-11-25 00:03:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137732325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:41,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:41,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:03:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730078237] [2023-11-25 00:03:41,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:41,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:41,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:41,004 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) [2023-11-25 00:03:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:43,810 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2023-11-25 00:03:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:43,811 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 [2023-11-25 00:03:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:43,827 INFO L225 Difference]: With dead ends: 1312 [2023-11-25 00:03:43,828 INFO L226 Difference]: Without dead ends: 926 [2023-11-25 00:03:43,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:03:43,844 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, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:43,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1015 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-25 00:03:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-25 00:03:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2023-11-25 00:03:43,972 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) [2023-11-25 00:03:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2023-11-25 00:03:43,983 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2023-11-25 00:03:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2023-11-25 00:03:43,984 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) [2023-11-25 00:03:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2023-11-25 00:03:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-25 00:03:43,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:43,995 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] [2023-11-25 00:03:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:03:43,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:43,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 466319195, now seen corresponding path program 1 times [2023-11-25 00:03:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:43,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031692320] [2023-11-25 00:03:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:03:44,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031692320] [2023-11-25 00:03:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031692320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:03:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243772884] [2023-11-25 00:03:44,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:44,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:03:44,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:03:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:44,694 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) [2023-11-25 00:03:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:47,368 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2023-11-25 00:03:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:03:47,369 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 [2023-11-25 00:03:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:47,387 INFO L225 Difference]: With dead ends: 2617 [2023-11-25 00:03:47,387 INFO L226 Difference]: Without dead ends: 1795 [2023-11-25 00:03:47,397 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 [2023-11-25 00:03:47,403 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1222 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:47,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1657 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-25 00:03:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2023-11-25 00:03:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2023-11-25 00:03:47,538 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) [2023-11-25 00:03:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2023-11-25 00:03:47,561 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2023-11-25 00:03:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:47,563 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2023-11-25 00:03:47,564 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) [2023-11-25 00:03:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2023-11-25 00:03:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-25 00:03:47,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:47,571 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] [2023-11-25 00:03:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:03:47,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1908948955, now seen corresponding path program 1 times [2023-11-25 00:03:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:47,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23769499] [2023-11-25 00:03:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:03:48,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:48,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23769499] [2023-11-25 00:03:48,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23769499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:48,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:48,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:03:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386901015] [2023-11-25 00:03:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:03:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:03:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:03:48,078 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) [2023-11-25 00:03:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:52,054 INFO L93 Difference]: Finished difference Result 4684 states and 7540 transitions. [2023-11-25 00:03:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:03:52,055 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 [2023-11-25 00:03:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:52,087 INFO L225 Difference]: With dead ends: 4684 [2023-11-25 00:03:52,087 INFO L226 Difference]: Without dead ends: 2992 [2023-11-25 00:03:52,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-25 00:03:52,103 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1434 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4358 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:52,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2156 Invalid, 5041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [683 Valid, 4358 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-25 00:03:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2023-11-25 00:03:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2797. [2023-11-25 00:03:52,374 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) [2023-11-25 00:03:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4471 transitions. [2023-11-25 00:03:52,404 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4471 transitions. Word has length 91 [2023-11-25 00:03:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:52,404 INFO L495 AbstractCegarLoop]: Abstraction has 2797 states and 4471 transitions. [2023-11-25 00:03:52,404 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) [2023-11-25 00:03:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4471 transitions. [2023-11-25 00:03:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-25 00:03:52,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:52,409 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] [2023-11-25 00:03:52,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:03:52,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:52,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1627941391, now seen corresponding path program 1 times [2023-11-25 00:03:52,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:52,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117000448] [2023-11-25 00:03:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:03:52,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117000448] [2023-11-25 00:03:52,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117000448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:52,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:52,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:03:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029893381] [2023-11-25 00:03:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:52,798 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) [2023-11-25 00:03:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:53,728 INFO L93 Difference]: Finished difference Result 2898 states and 4637 transitions. [2023-11-25 00:03:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:53,729 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 [2023-11-25 00:03:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:53,759 INFO L225 Difference]: With dead ends: 2898 [2023-11-25 00:03:53,759 INFO L226 Difference]: Without dead ends: 2883 [2023-11-25 00:03:53,763 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 [2023-11-25 00:03:53,765 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 721 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:53,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1933 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:03:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2023-11-25 00:03:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2803. [2023-11-25 00:03:54,050 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) [2023-11-25 00:03:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4477 transitions. [2023-11-25 00:03:54,074 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4477 transitions. Word has length 92 [2023-11-25 00:03:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:54,074 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4477 transitions. [2023-11-25 00:03:54,075 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) [2023-11-25 00:03:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4477 transitions. [2023-11-25 00:03:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-25 00:03:54,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:54,080 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] [2023-11-25 00:03:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:03:54,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:54,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1069205745, now seen corresponding path program 1 times [2023-11-25 00:03:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764333347] [2023-11-25 00:03:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:03:54,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764333347] [2023-11-25 00:03:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764333347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:54,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:54,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-25 00:03:54,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635197178] [2023-11-25 00:03:54,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:54,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:03:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:03:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:03:54,693 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) [2023-11-25 00:04:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:01,434 INFO L93 Difference]: Finished difference Result 3228 states and 5119 transitions. [2023-11-25 00:04:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-25 00:04:01,435 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 [2023-11-25 00:04:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:01,468 INFO L225 Difference]: With dead ends: 3228 [2023-11-25 00:04:01,468 INFO L226 Difference]: Without dead ends: 3211 [2023-11-25 00:04:01,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:04:01,474 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 2773 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 8514 mSolverCounterSat, 1527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 3927 SdHoareTripleChecker+Invalid, 10041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1527 IncrementalHoareTripleChecker+Valid, 8514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:01,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2802 Valid, 3927 Invalid, 10041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1527 Valid, 8514 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-25 00:04:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2023-11-25 00:04:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2991. [2023-11-25 00:04:01,764 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) [2023-11-25 00:04:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4738 transitions. [2023-11-25 00:04:01,843 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4738 transitions. Word has length 97 [2023-11-25 00:04:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:01,844 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4738 transitions. [2023-11-25 00:04:01,844 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) [2023-11-25 00:04:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4738 transitions. [2023-11-25 00:04:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-25 00:04:01,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:01,852 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] [2023-11-25 00:04:01,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:04:01,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:01,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1643250415, now seen corresponding path program 1 times [2023-11-25 00:04:01,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:01,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428651296] [2023-11-25 00:04:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:01,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:02,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428651296] [2023-11-25 00:04:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428651296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:02,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958913745] [2023-11-25 00:04:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:02,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:02,220 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) [2023-11-25 00:04:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:04,260 INFO L93 Difference]: Finished difference Result 8037 states and 12889 transitions. [2023-11-25 00:04:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:04,261 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 [2023-11-25 00:04:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:04,303 INFO L225 Difference]: With dead ends: 8037 [2023-11-25 00:04:04,303 INFO L226 Difference]: Without dead ends: 5066 [2023-11-25 00:04:04,323 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 [2023-11-25 00:04:04,324 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1231 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:04,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 702 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2023-11-25 00:04:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4691. [2023-11-25 00:04:04,859 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) [2023-11-25 00:04:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7455 transitions. [2023-11-25 00:04:04,897 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7455 transitions. Word has length 104 [2023-11-25 00:04:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:04,899 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 7455 transitions. [2023-11-25 00:04:04,900 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) [2023-11-25 00:04:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7455 transitions. [2023-11-25 00:04:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-25 00:04:04,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:04,906 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] [2023-11-25 00:04:04,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:04:04,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:04,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash -599136738, now seen corresponding path program 1 times [2023-11-25 00:04:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944304208] [2023-11-25 00:04:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:04,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:05,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944304208] [2023-11-25 00:04:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944304208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:05,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500245684] [2023-11-25 00:04:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:05,322 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) [2023-11-25 00:04:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:07,723 INFO L93 Difference]: Finished difference Result 13030 states and 21062 transitions. [2023-11-25 00:04:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:07,723 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 [2023-11-25 00:04:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:07,796 INFO L225 Difference]: With dead ends: 13030 [2023-11-25 00:04:07,846 INFO L226 Difference]: Without dead ends: 8362 [2023-11-25 00:04:07,874 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 [2023-11-25 00:04:07,875 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1218 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:07,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 715 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8362 states. [2023-11-25 00:04:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8362 to 7900. [2023-11-25 00:04:08,708 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) [2023-11-25 00:04:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 12636 transitions. [2023-11-25 00:04:08,756 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 12636 transitions. Word has length 105 [2023-11-25 00:04:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:08,756 INFO L495 AbstractCegarLoop]: Abstraction has 7900 states and 12636 transitions. [2023-11-25 00:04:08,757 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) [2023-11-25 00:04:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 12636 transitions. [2023-11-25 00:04:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-25 00:04:08,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:08,763 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] [2023-11-25 00:04:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:04:08,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:08,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1393657839, now seen corresponding path program 1 times [2023-11-25 00:04:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056672522] [2023-11-25 00:04:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:09,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:09,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056672522] [2023-11-25 00:04:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056672522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:09,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:09,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218435767] [2023-11-25 00:04:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:09,045 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) [2023-11-25 00:04:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:11,963 INFO L93 Difference]: Finished difference Result 22793 states and 37460 transitions. [2023-11-25 00:04:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:11,964 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 106 [2023-11-25 00:04:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:12,044 INFO L225 Difference]: With dead ends: 22793 [2023-11-25 00:04:12,044 INFO L226 Difference]: Without dead ends: 14922 [2023-11-25 00:04:12,091 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 [2023-11-25 00:04:12,092 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1205 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:12,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 728 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-25 00:04:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14922 states. [2023-11-25 00:04:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14922 to 14257. [2023-11-25 00:04:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14257 states, 9913 states have (on average 1.5507918894381116) internal successors, (15373), 10511 states have internal predecessors, (15373), 3341 states have call successors, (3341), 790 states have call predecessors, (3341), 1002 states have return successors, (4384), 3135 states have call predecessors, (4384), 3336 states have call successors, (4384) [2023-11-25 00:04:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14257 states to 14257 states and 23098 transitions. [2023-11-25 00:04:13,723 INFO L78 Accepts]: Start accepts. Automaton has 14257 states and 23098 transitions. Word has length 106 [2023-11-25 00:04:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:13,723 INFO L495 AbstractCegarLoop]: Abstraction has 14257 states and 23098 transitions. [2023-11-25 00:04:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-25 00:04:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 14257 states and 23098 transitions. [2023-11-25 00:04:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-25 00:04:13,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:13,729 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, 1] [2023-11-25 00:04:13,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:04:13,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash -254004288, now seen corresponding path program 1 times [2023-11-25 00:04:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909319338] [2023-11-25 00:04:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:14,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909319338] [2023-11-25 00:04:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909319338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:14,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:14,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933344355] [2023-11-25 00:04:14,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:14,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:14,006 INFO L87 Difference]: Start difference. First operand 14257 states and 23098 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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)