./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/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_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/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_576e81f1-cd9e-416e-b32f-9b4530ecaaff/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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:17,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:17,122 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:08:17,132 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:17,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:17,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:17,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:17,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:17,173 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:17,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:17,179 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:17,180 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:17,180 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:17,182 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:17,183 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:17,183 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:17,184 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:17,184 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:17,184 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:17,185 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:17,185 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:17,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:17,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:17,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:08:17,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:08:17,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:17,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:08:17,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:17,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:08:17,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:17,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:08:17,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:08:17,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:08:17,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:17,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:17,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:17,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:17,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:17,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:17,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:17,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:08:17,199 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:17,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:17,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:17,200 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:08:17,200 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:17,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:17,200 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_576e81f1-cd9e-416e-b32f-9b4530ecaaff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2023-11-25 00:08:17,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:17,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:17,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:17,541 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:17,542 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:17,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2023-11-25 00:08:20,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:21,379 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:21,379 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2023-11-25 00:08:21,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/data/e2f1a68fa/a25ca442b5d241d7ab9eb54ab65ac7a6/FLAGd9c039ce9 [2023-11-25 00:08:21,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/data/e2f1a68fa/a25ca442b5d241d7ab9eb54ab65ac7a6 [2023-11-25 00:08:21,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:21,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:21,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:21,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:21,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:21,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d37e9f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21, skipping insertion in model container [2023-11-25 00:08:21,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:21,797 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_576e81f1-cd9e-416e-b32f-9b4530ecaaff/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2023-11-25 00:08:22,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:22,269 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:22,281 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-25 00:08:22,282 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [57] [2023-11-25 00:08:22,283 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [159] [2023-11-25 00:08:22,283 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [525] [2023-11-25 00:08:22,283 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [541] [2023-11-25 00:08:22,285 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [579] [2023-11-25 00:08:22,285 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [932] [2023-11-25 00:08:22,285 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1604] [2023-11-25 00:08:22,286 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1724] [2023-11-25 00:08:22,286 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [3302] [2023-11-25 00:08:22,294 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_576e81f1-cd9e-416e-b32f-9b4530ecaaff/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2023-11-25 00:08:22,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:22,519 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:22,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22 WrapperNode [2023-11-25 00:08:22,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:22,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:22,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:22,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:22,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,773 INFO L138 Inliner]: procedures = 95, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 908 [2023-11-25 00:08:22,773 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:22,774 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:22,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:22,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:22,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:22,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:22,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:22,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:22,890 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (1/1) ... [2023-11-25 00:08:22,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:22,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:23,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_576e81f1-cd9e-416e-b32f-9b4530ecaaff/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:23,032 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-25 00:08:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-25 00:08:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-25 00:08:23,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-25 00:08:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-25 00:08:23,035 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-25 00:08:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:08:23,035 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:08:23,036 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:08:23,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:08:23,036 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:08:23,038 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:08:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-25 00:08:23,039 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-25 00:08:23,039 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:08:23,041 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:08:23,041 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:08:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:08:23,042 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-25 00:08:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-25 00:08:23,042 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-25 00:08:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-25 00:08:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:08:23,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:08:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:08:23,043 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:08:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:08:23,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:08:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-25 00:08:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-25 00:08:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:08:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:08:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:08:23,045 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:08:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:08:23,045 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:08:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:08:23,045 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:08:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:08:23,046 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:08:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:08:23,046 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:08:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:08:23,047 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:08:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:08:23,047 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:08:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:08:23,048 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:08:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-25 00:08:23,049 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-25 00:08:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:23,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:08:23,050 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:08:23,243 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:23,246 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:24,790 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:25,896 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:25,897 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:08:25,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:25 BoogieIcfgContainer [2023-11-25 00:08:25,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:25,904 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:25,904 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:25,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:25,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:21" (1/3) ... [2023-11-25 00:08:25,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff2e128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:25, skipping insertion in model container [2023-11-25 00:08:25,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:22" (2/3) ... [2023-11-25 00:08:25,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff2e128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:25, skipping insertion in model container [2023-11-25 00:08:25,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:25" (3/3) ... [2023-11-25 00:08:25,913 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2023-11-25 00:08:25,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:25,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:08:26,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:26,043 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;@5d499e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:26,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:08:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-25 00:08:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-25 00:08:26,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:26,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:26,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:26,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -55596758, now seen corresponding path program 1 times [2023-11-25 00:08:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:26,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949546143] [2023-11-25 00:08:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:08:27,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949546143] [2023-11-25 00:08:27,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949546143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:27,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:27,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:08:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530047741] [2023-11-25 00:08:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:27,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:08:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:08:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:27,487 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-25 00:08:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:30,351 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2023-11-25 00:08:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:08:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2023-11-25 00:08:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:30,377 INFO L225 Difference]: With dead ends: 1260 [2023-11-25 00:08:30,377 INFO L226 Difference]: Without dead ends: 887 [2023-11-25 00:08:30,387 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 00:08:30,390 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 1241 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:30,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 1012 Invalid, 1897 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [454 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-25 00:08:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-25 00:08:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2023-11-25 00:08:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.6007130124777185) internal successors, (898), 591 states have internal predecessors, (898), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2023-11-25 00:08:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2023-11-25 00:08:30,568 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2023-11-25 00:08:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:30,570 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2023-11-25 00:08:30,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-25 00:08:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2023-11-25 00:08:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-25 00:08:30,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:30,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:08:30,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:30,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1621031930, now seen corresponding path program 1 times [2023-11-25 00:08:30,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:30,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938465740] [2023-11-25 00:08:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:08:31,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938465740] [2023-11-25 00:08:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938465740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:31,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:08:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476456498] [2023-11-25 00:08:31,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:31,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:08:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:08:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:31,089 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-25 00:08:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:31,605 INFO L93 Difference]: Finished difference Result 1767 states and 2881 transitions. [2023-11-25 00:08:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:08:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2023-11-25 00:08:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:31,622 INFO L225 Difference]: With dead ends: 1767 [2023-11-25 00:08:31,622 INFO L226 Difference]: Without dead ends: 991 [2023-11-25 00:08:31,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:31,637 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 177 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:31,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2300 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:08:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-25 00:08:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 806. [2023-11-25 00:08:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 567 states have (on average 1.5943562610229276) internal successors, (904), 597 states have internal predecessors, (904), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2023-11-25 00:08:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1292 transitions. [2023-11-25 00:08:31,727 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1292 transitions. Word has length 87 [2023-11-25 00:08:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:31,728 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1292 transitions. [2023-11-25 00:08:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-25 00:08:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1292 transitions. [2023-11-25 00:08:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-25 00:08:31,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:31,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:31,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:08:31,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:31,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1340310849, now seen corresponding path program 1 times [2023-11-25 00:08:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:31,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985793115] [2023-11-25 00:08:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:32,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985793115] [2023-11-25 00:08:32,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985793115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:32,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:32,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-25 00:08:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785965025] [2023-11-25 00:08:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:08:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:08:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:08:32,458 INFO L87 Difference]: Start difference. First operand 806 states and 1292 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-25 00:08:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:36,378 INFO L93 Difference]: Finished difference Result 2764 states and 4480 transitions. [2023-11-25 00:08:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-25 00:08:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2023-11-25 00:08:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:36,394 INFO L225 Difference]: With dead ends: 2764 [2023-11-25 00:08:36,394 INFO L226 Difference]: Without dead ends: 1982 [2023-11-25 00:08:36,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:08:36,401 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1754 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:36,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1819 Valid, 2558 Invalid, 4181 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [571 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-25 00:08:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2023-11-25 00:08:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1881. [2023-11-25 00:08:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1354 states have (on average 1.605612998522895) internal successors, (2174), 1406 states have internal predecessors, (2174), 419 states have call successors, (419), 92 states have call predecessors, (419), 107 states have return successors, (458), 406 states have call predecessors, (458), 414 states have call successors, (458) [2023-11-25 00:08:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3051 transitions. [2023-11-25 00:08:36,579 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3051 transitions. Word has length 89 [2023-11-25 00:08:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:36,580 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 3051 transitions. [2023-11-25 00:08:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-25 00:08:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3051 transitions. [2023-11-25 00:08:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-25 00:08:36,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:36,586 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:36,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:08:36,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:36,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1757234833, now seen corresponding path program 1 times [2023-11-25 00:08:36,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:36,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714277761] [2023-11-25 00:08:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:36,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:37,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:37,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714277761] [2023-11-25 00:08:37,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714277761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:37,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:37,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:08:37,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855615005] [2023-11-25 00:08:37,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:08:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:08:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:08:37,237 INFO L87 Difference]: Start difference. First operand 1881 states and 3051 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-25 00:08:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:40,754 INFO L93 Difference]: Finished difference Result 5183 states and 8421 transitions. [2023-11-25 00:08:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:08:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 92 [2023-11-25 00:08:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:40,784 INFO L225 Difference]: With dead ends: 5183 [2023-11-25 00:08:40,784 INFO L226 Difference]: Without dead ends: 3325 [2023-11-25 00:08:40,796 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 00:08:40,804 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 1366 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 2124 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:40,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 2124 Invalid, 4715 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [654 Valid, 4061 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-25 00:08:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2023-11-25 00:08:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3110. [2023-11-25 00:08:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2206 states have (on average 1.5897552130553037) internal successors, (3507), 2297 states have internal predecessors, (3507), 732 states have call successors, (732), 141 states have call predecessors, (732), 171 states have return successors, (795), 715 states have call predecessors, (795), 727 states have call successors, (795) [2023-11-25 00:08:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 5034 transitions. [2023-11-25 00:08:41,162 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 5034 transitions. Word has length 92 [2023-11-25 00:08:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:41,162 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 5034 transitions. [2023-11-25 00:08:41,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-25 00:08:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 5034 transitions. [2023-11-25 00:08:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-25 00:08:41,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:41,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:41,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:08:41,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:41,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 57300725, now seen corresponding path program 1 times [2023-11-25 00:08:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107995900] [2023-11-25 00:08:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:41,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:41,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107995900] [2023-11-25 00:08:41,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107995900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:41,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:41,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:08:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126818960] [2023-11-25 00:08:41,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:41,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:08:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:08:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:41,674 INFO L87 Difference]: Start difference. First operand 3110 states and 5034 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:42,117 INFO L93 Difference]: Finished difference Result 5549 states and 9002 transitions. [2023-11-25 00:08:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:08:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-25 00:08:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:42,151 INFO L225 Difference]: With dead ends: 5549 [2023-11-25 00:08:42,151 INFO L226 Difference]: Without dead ends: 3222 [2023-11-25 00:08:42,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:42,171 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:42,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3390 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2023-11-25 00:08:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3180. [2023-11-25 00:08:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2256 states have (on average 1.5766843971631206) internal successors, (3557), 2347 states have internal predecessors, (3557), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 735 states have call predecessors, (845), 727 states have call successors, (845) [2023-11-25 00:08:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5134 transitions. [2023-11-25 00:08:42,587 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5134 transitions. Word has length 93 [2023-11-25 00:08:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:42,589 INFO L495 AbstractCegarLoop]: Abstraction has 3180 states and 5134 transitions. [2023-11-25 00:08:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5134 transitions. [2023-11-25 00:08:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-25 00:08:42,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:42,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:42,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:08:42,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:42,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -904668488, now seen corresponding path program 1 times [2023-11-25 00:08:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:42,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676155233] [2023-11-25 00:08:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:43,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:43,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676155233] [2023-11-25 00:08:43,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676155233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:43,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:43,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:08:43,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979842049] [2023-11-25 00:08:43,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:08:43,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:08:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:43,136 INFO L87 Difference]: Start difference. First operand 3180 states and 5134 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:43,608 INFO L93 Difference]: Finished difference Result 5655 states and 9142 transitions. [2023-11-25 00:08:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:08:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2023-11-25 00:08:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:43,642 INFO L225 Difference]: With dead ends: 5655 [2023-11-25 00:08:43,642 INFO L226 Difference]: Without dead ends: 3272 [2023-11-25 00:08:43,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:43,660 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:43,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3390 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2023-11-25 00:08:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3190. [2023-11-25 00:08:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 2266 states have (on average 1.5741394527802295) internal successors, (3567), 2347 states have internal predecessors, (3567), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 745 states have call predecessors, (845), 727 states have call successors, (845) [2023-11-25 00:08:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 5144 transitions. [2023-11-25 00:08:44,084 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 5144 transitions. Word has length 94 [2023-11-25 00:08:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:44,085 INFO L495 AbstractCegarLoop]: Abstraction has 3190 states and 5144 transitions. [2023-11-25 00:08:44,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 5144 transitions. [2023-11-25 00:08:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-25 00:08:44,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:44,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:08:44,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:44,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -786255720, now seen corresponding path program 1 times [2023-11-25 00:08:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:44,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376732149] [2023-11-25 00:08:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:44,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:44,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376732149] [2023-11-25 00:08:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376732149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:44,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:44,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:08:44,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383131148] [2023-11-25 00:08:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:08:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:08:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:44,539 INFO L87 Difference]: Start difference. First operand 3190 states and 5144 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:45,022 INFO L93 Difference]: Finished difference Result 5673 states and 9160 transitions. [2023-11-25 00:08:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:08:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2023-11-25 00:08:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:45,054 INFO L225 Difference]: With dead ends: 5673 [2023-11-25 00:08:45,054 INFO L226 Difference]: Without dead ends: 3282 [2023-11-25 00:08:45,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:45,071 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 6 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:45,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3404 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2023-11-25 00:08:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3200. [2023-11-25 00:08:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2276 states have (on average 1.5716168717047452) internal successors, (3577), 2347 states have internal predecessors, (3577), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 755 states have call predecessors, (845), 727 states have call successors, (845) [2023-11-25 00:08:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5154 transitions. [2023-11-25 00:08:45,380 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5154 transitions. Word has length 94 [2023-11-25 00:08:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:45,381 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 5154 transitions. [2023-11-25 00:08:45,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:08:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5154 transitions. [2023-11-25 00:08:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-25 00:08:45,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:45,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:45,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:08:45,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:45,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 562791760, now seen corresponding path program 1 times [2023-11-25 00:08:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314996258] [2023-11-25 00:08:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:46,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:46,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314996258] [2023-11-25 00:08:46,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314996258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:46,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:46,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:08:46,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14449154] [2023-11-25 00:08:46,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:46,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:08:46,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:46,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:08:46,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:08:46,065 INFO L87 Difference]: Start difference. First operand 3200 states and 5154 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-25 00:08:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:48,988 INFO L93 Difference]: Finished difference Result 7984 states and 12948 transitions. [2023-11-25 00:08:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:08:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2023-11-25 00:08:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:49,043 INFO L225 Difference]: With dead ends: 7984 [2023-11-25 00:08:49,043 INFO L226 Difference]: Without dead ends: 5343 [2023-11-25 00:08:49,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:08:49,070 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 2097 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2264 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:49,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2264 Valid, 1330 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-25 00:08:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2023-11-25 00:08:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5204. [2023-11-25 00:08:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 3627 states have (on average 1.533498759305211) internal successors, (5562), 3768 states have internal predecessors, (5562), 1246 states have call successors, (1246), 250 states have call predecessors, (1246), 330 states have return successors, (1466), 1262 states have call predecessors, (1466), 1241 states have call successors, (1466) [2023-11-25 00:08:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 8274 transitions. [2023-11-25 00:08:49,663 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 8274 transitions. Word has length 98 [2023-11-25 00:08:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:49,664 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 8274 transitions. [2023-11-25 00:08:49,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-25 00:08:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 8274 transitions. [2023-11-25 00:08:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-25 00:08:49,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:49,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:49,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:08:49,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:49,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -688639521, now seen corresponding path program 1 times [2023-11-25 00:08:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:49,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784261867] [2023-11-25 00:08:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:49,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:50,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784261867] [2023-11-25 00:08:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784261867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:50,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:50,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-25 00:08:50,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630953769] [2023-11-25 00:08:50,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:50,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:08:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:08:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:08:50,411 INFO L87 Difference]: Start difference. First operand 5204 states and 8274 transitions. Second operand has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-25 00:08:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:56,493 INFO L93 Difference]: Finished difference Result 10927 states and 17674 transitions. [2023-11-25 00:08:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-25 00:08:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) Word has length 100 [2023-11-25 00:08:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:56,555 INFO L225 Difference]: With dead ends: 10927 [2023-11-25 00:08:56,556 INFO L226 Difference]: Without dead ends: 6194 [2023-11-25 00:08:56,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-11-25 00:08:56,600 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 2215 mSDsluCounter, 4030 mSDsCounter, 0 mSdLazyCounter, 6998 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 8197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 6998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:56,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 4566 Invalid, 8197 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1199 Valid, 6998 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-25 00:08:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2023-11-25 00:08:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 6000. [2023-11-25 00:08:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 4352 states have (on average 1.5415900735294117) internal successors, (6709), 4513 states have internal predecessors, (6709), 1269 states have call successors, (1269), 278 states have call predecessors, (1269), 378 states have return successors, (1489), 1285 states have call predecessors, (1489), 1264 states have call successors, (1489) [2023-11-25 00:08:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 9467 transitions. [2023-11-25 00:08:57,281 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 9467 transitions. Word has length 100 [2023-11-25 00:08:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 6000 states and 9467 transitions. [2023-11-25 00:08:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-25 00:08:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 9467 transitions. [2023-11-25 00:08:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-25 00:08:57,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:57,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:08:57,289 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:57,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1605544584, now seen corresponding path program 1 times [2023-11-25 00:08:57,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:57,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370255873] [2023-11-25 00:08:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:57,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:57,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:57,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370255873] [2023-11-25 00:08:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370255873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:57,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:08:57,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806132352] [2023-11-25 00:08:57,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:57,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:08:57,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:57,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:08:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:57,702 INFO L87 Difference]: Start difference. First operand 6000 states and 9467 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17)