./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire --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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:32:03,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:32:03,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:32:03,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:32:03,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:32:03,236 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:32:03,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:32:03,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:32:03,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:32:03,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:32:03,247 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:32:03,248 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:32:03,248 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:32:03,251 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:32:03,251 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:32:03,252 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:32:03,252 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:32:03,253 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:32:03,253 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:32:03,256 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:32:03,256 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:32:03,257 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:32:03,259 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:32:03,259 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:32:03,260 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:32:03,260 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:32:03,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:32:03,261 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:32:03,261 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:32:03,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:32:03,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:32:03,264 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:32:03,264 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:32:03,264 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:32:03,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:32:03,265 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:32:03,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:32:03,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:32:03,267 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:32:03,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:32:03,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:32:03,268 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:32:03,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:32:03,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:32:03,269 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:32:03,270 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:32:03,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:32:03,270 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_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2023-11-23 21:32:03,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:32:03,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:32:03,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:32:03,658 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:32:03,659 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:32:03,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2023-11-23 21:32:07,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:32:07,540 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:32:07,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2023-11-23 21:32:07,562 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/data/255f0e4c1/3796a15469804b91b07117c2051a6502/FLAGfff040626 [2023-11-23 21:32:07,576 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/data/255f0e4c1/3796a15469804b91b07117c2051a6502 [2023-11-23 21:32:07,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:32:07,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:32:07,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:32:07,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:32:07,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:32:07,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:32:07" (1/1) ... [2023-11-23 21:32:07,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6d7b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:07, skipping insertion in model container [2023-11-23 21:32:07,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:32:07" (1/1) ... [2023-11-23 21:32:07,675 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:32:08,281 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_d85ee66b-7e50-431e-b654-59ff260430d1/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2023-11-23 21:32:08,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:32:08,385 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:32:08,396 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-23 21:32:08,398 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [414] [2023-11-23 21:32:08,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [428] [2023-11-23 21:32:08,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [594] [2023-11-23 21:32:08,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2119] [2023-11-23 21:32:08,400 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2128] [2023-11-23 21:32:08,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2790] [2023-11-23 21:32:08,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3145] [2023-11-23 21:32:08,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3236] [2023-11-23 21:32:08,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3271] [2023-11-23 21:32:08,472 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_d85ee66b-7e50-431e-b654-59ff260430d1/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2023-11-23 21:32:08,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:32:08,529 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:32:08,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08 WrapperNode [2023-11-23 21:32:08,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:32:08,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:32:08,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:32:08,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:32:08,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,674 INFO L138 Inliner]: procedures = 93, calls = 337, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 813 [2023-11-23 21:32:08,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:32:08,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:32:08,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:32:08,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:32:08,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,772 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:32:08,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:32:08,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:32:08,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:32:08,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (1/1) ... [2023-11-23 21:32:08,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:32:08,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:32:08,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:32:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85ee66b-7e50-431e-b654-59ff260430d1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:32:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:32:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 21:32:08,940 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 21:32:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:32:08,941 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:32:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:32:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:32:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:32:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:32:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:32:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:32:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:32:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:32:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:32:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:32:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 21:32:08,947 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 21:32:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:32:08,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:32:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:32:08,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:32:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:32:08,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:32:08,948 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:32:08,949 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:32:08,949 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:32:08,949 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:32:08,949 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:32:08,949 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:32:08,949 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-11-23 21:32:08,949 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-11-23 21:32:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:32:08,950 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:32:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:32:08,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:32:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:32:08,950 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:32:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-23 21:32:08,951 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-23 21:32:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:32:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:32:08,951 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:32:08,951 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:32:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:32:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:32:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:32:08,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:32:08,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:32:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:32:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:32:09,153 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:32:09,157 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:32:10,372 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:32:11,393 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:32:11,393 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:32:11,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:32:11 BoogieIcfgContainer [2023-11-23 21:32:11,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:32:11,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:32:11,398 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:32:11,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:32:11,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:32:07" (1/3) ... [2023-11-23 21:32:11,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ef368a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:32:11, skipping insertion in model container [2023-11-23 21:32:11,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:32:08" (2/3) ... [2023-11-23 21:32:11,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ef368a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:32:11, skipping insertion in model container [2023-11-23 21:32:11,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:32:11" (3/3) ... [2023-11-23 21:32:11,404 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2023-11-23 21:32:11,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:32:11,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:32:11,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:32:11,492 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;@33427c85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:32:11,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:32:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-23 21:32:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:32:11,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:11,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:11,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:11,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash -915793724, now seen corresponding path program 1 times [2023-11-23 21:32:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:11,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906250527] [2023-11-23 21:32:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:11,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906250527] [2023-11-23 21:32:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906250527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:11,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:11,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:32:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128200442] [2023-11-23 21:32:11,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:32:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:32:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:32:11,993 INFO L87 Difference]: Start difference. First operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:32:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:12,220 INFO L93 Difference]: Finished difference Result 369 states and 587 transitions. [2023-11-23 21:32:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:32:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 39 [2023-11-23 21:32:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:12,251 INFO L225 Difference]: With dead ends: 369 [2023-11-23 21:32:12,252 INFO L226 Difference]: Without dead ends: 347 [2023-11-23 21:32:12,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:32:12,259 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:12,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 516 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:32:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-23 21:32:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-11-23 21:32:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 235 states have (on average 1.6) internal successors, (376), 256 states have internal predecessors, (376), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2023-11-23 21:32:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 549 transitions. [2023-11-23 21:32:12,369 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 549 transitions. Word has length 39 [2023-11-23 21:32:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 549 transitions. [2023-11-23 21:32:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:32:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 549 transitions. [2023-11-23 21:32:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:32:12,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:12,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:12,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:32:12,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:12,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:12,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1832338948, now seen corresponding path program 1 times [2023-11-23 21:32:12,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:12,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781428069] [2023-11-23 21:32:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:13,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:13,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781428069] [2023-11-23 21:32:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781428069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:13,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:13,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:32:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365779808] [2023-11-23 21:32:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:13,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:32:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:32:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:32:13,032 INFO L87 Difference]: Start difference. First operand 347 states and 549 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:32:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:15,160 INFO L93 Difference]: Finished difference Result 1123 states and 1814 transitions. [2023-11-23 21:32:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:32:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2023-11-23 21:32:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:15,171 INFO L225 Difference]: With dead ends: 1123 [2023-11-23 21:32:15,172 INFO L226 Difference]: Without dead ends: 792 [2023-11-23 21:32:15,177 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 [2023-11-23 21:32:15,178 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1827 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:15,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1884 Valid, 673 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:32:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-11-23 21:32:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 695. [2023-11-23 21:32:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 491 states have (on average 1.6191446028513239) internal successors, (795), 521 states have internal predecessors, (795), 163 states have call successors, (163), 39 states have call predecessors, (163), 40 states have return successors, (165), 147 states have call predecessors, (165), 158 states have call successors, (165) [2023-11-23 21:32:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1123 transitions. [2023-11-23 21:32:15,253 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1123 transitions. Word has length 40 [2023-11-23 21:32:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:15,254 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1123 transitions. [2023-11-23 21:32:15,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-23 21:32:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1123 transitions. [2023-11-23 21:32:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:32:15,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:15,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:32:15,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:15,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1059287074, now seen corresponding path program 1 times [2023-11-23 21:32:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083116008] [2023-11-23 21:32:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:15,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:15,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083116008] [2023-11-23 21:32:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083116008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:15,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:15,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:32:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636677884] [2023-11-23 21:32:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:15,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:32:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:32:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:32:15,753 INFO L87 Difference]: Start difference. First operand 695 states and 1123 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:32:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:18,438 INFO L93 Difference]: Finished difference Result 2349 states and 3843 transitions. [2023-11-23 21:32:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:32:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-11-23 21:32:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:18,486 INFO L225 Difference]: With dead ends: 2349 [2023-11-23 21:32:18,486 INFO L226 Difference]: Without dead ends: 1671 [2023-11-23 21:32:18,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:32:18,500 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1609 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:18,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 1489 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:32:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2023-11-23 21:32:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1602. [2023-11-23 21:32:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1161 states have (on average 1.6391042204995694) internal successors, (1903), 1221 states have internal predecessors, (1903), 348 states have call successors, (348), 81 states have call predecessors, (348), 92 states have return successors, (375), 323 states have call predecessors, (375), 343 states have call successors, (375) [2023-11-23 21:32:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2626 transitions. [2023-11-23 21:32:18,684 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2626 transitions. Word has length 62 [2023-11-23 21:32:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:18,685 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2626 transitions. [2023-11-23 21:32:18,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:32:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2626 transitions. [2023-11-23 21:32:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:32:18,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:18,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:18,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:32:18,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:18,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1407886496, now seen corresponding path program 1 times [2023-11-23 21:32:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:18,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034692466] [2023-11-23 21:32:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:18,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:19,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034692466] [2023-11-23 21:32:19,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034692466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:19,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:19,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:32:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014683604] [2023-11-23 21:32:19,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:19,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:32:19,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:32:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:32:19,243 INFO L87 Difference]: Start difference. First operand 1602 states and 2626 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:32:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:22,373 INFO L93 Difference]: Finished difference Result 4375 states and 7183 transitions. [2023-11-23 21:32:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:32:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2023-11-23 21:32:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:22,396 INFO L225 Difference]: With dead ends: 4375 [2023-11-23 21:32:22,397 INFO L226 Difference]: Without dead ends: 2789 [2023-11-23 21:32:22,406 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 [2023-11-23 21:32:22,408 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 1198 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 3688 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 3688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:22,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1792 Invalid, 4252 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [564 Valid, 3688 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 21:32:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2023-11-23 21:32:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2636. [2023-11-23 21:32:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1882 states have (on average 1.626461211477152) internal successors, (3061), 1985 states have internal predecessors, (3061), 608 states have call successors, (608), 121 states have call predecessors, (608), 145 states have return successors, (653), 574 states have call predecessors, (653), 603 states have call successors, (653) [2023-11-23 21:32:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4322 transitions. [2023-11-23 21:32:22,683 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4322 transitions. Word has length 65 [2023-11-23 21:32:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:22,684 INFO L495 AbstractCegarLoop]: Abstraction has 2636 states and 4322 transitions. [2023-11-23 21:32:22,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:32:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4322 transitions. [2023-11-23 21:32:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:32:22,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:22,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:32:22,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:22,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -735888399, now seen corresponding path program 1 times [2023-11-23 21:32:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:22,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245078431] [2023-11-23 21:32:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:22,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245078431] [2023-11-23 21:32:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245078431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:22,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:22,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:32:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882695560] [2023-11-23 21:32:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:32:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:32:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:32:22,900 INFO L87 Difference]: Start difference. First operand 2636 states and 4322 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:32:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:23,272 INFO L93 Difference]: Finished difference Result 4674 states and 7681 transitions. [2023-11-23 21:32:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:32:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2023-11-23 21:32:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:23,295 INFO L225 Difference]: With dead ends: 4674 [2023-11-23 21:32:23,295 INFO L226 Difference]: Without dead ends: 2700 [2023-11-23 21:32:23,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:32:23,308 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 7 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:23,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2027 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:32:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2023-11-23 21:32:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2676. [2023-11-23 21:32:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 1912 states have (on average 1.61663179916318) internal successors, (3091), 2015 states have internal predecessors, (3091), 608 states have call successors, (608), 121 states have call predecessors, (608), 155 states have return successors, (673), 584 states have call predecessors, (673), 603 states have call successors, (673) [2023-11-23 21:32:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4372 transitions. [2023-11-23 21:32:23,580 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4372 transitions. Word has length 66 [2023-11-23 21:32:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:23,581 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4372 transitions. [2023-11-23 21:32:23,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:32:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4372 transitions. [2023-11-23 21:32:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:32:23,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:23,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:32:23,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:23,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash 713717017, now seen corresponding path program 1 times [2023-11-23 21:32:23,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:23,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977999485] [2023-11-23 21:32:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:23,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:24,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:24,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977999485] [2023-11-23 21:32:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977999485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:24,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:32:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963170172] [2023-11-23 21:32:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:32:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:32:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:32:24,019 INFO L87 Difference]: Start difference. First operand 2676 states and 4372 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 21:32:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:26,583 INFO L93 Difference]: Finished difference Result 6610 states and 10814 transitions. [2023-11-23 21:32:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:32:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 70 [2023-11-23 21:32:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:26,619 INFO L225 Difference]: With dead ends: 6610 [2023-11-23 21:32:26,619 INFO L226 Difference]: Without dead ends: 4404 [2023-11-23 21:32:26,635 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 [2023-11-23 21:32:26,638 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2707 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2844 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:26,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2844 Valid, 1012 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:32:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2023-11-23 21:32:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4296. [2023-11-23 21:32:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 3003 states have (on average 1.57009657009657) internal successors, (4715), 3184 states have internal predecessors, (4715), 1017 states have call successors, (1017), 215 states have call predecessors, (1017), 275 states have return successors, (1153), 974 states have call predecessors, (1153), 1012 states have call successors, (1153) [2023-11-23 21:32:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6885 transitions. [2023-11-23 21:32:27,066 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6885 transitions. Word has length 70 [2023-11-23 21:32:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:27,067 INFO L495 AbstractCegarLoop]: Abstraction has 4296 states and 6885 transitions. [2023-11-23 21:32:27,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-23 21:32:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6885 transitions. [2023-11-23 21:32:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:32:27,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:27,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:27,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:32:27,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1871223060, now seen corresponding path program 1 times [2023-11-23 21:32:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073879650] [2023-11-23 21:32:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:32:27,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:27,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073879650] [2023-11-23 21:32:27,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073879650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:27,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:27,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 21:32:27,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352455446] [2023-11-23 21:32:27,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:27,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:32:27,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:32:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:32:27,484 INFO L87 Difference]: Start difference. First operand 4296 states and 6885 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-23 21:32:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:32,073 INFO L93 Difference]: Finished difference Result 8821 states and 14379 transitions. [2023-11-23 21:32:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 21:32:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2023-11-23 21:32:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:32,114 INFO L225 Difference]: With dead ends: 8821 [2023-11-23 21:32:32,114 INFO L226 Difference]: Without dead ends: 4455 [2023-11-23 21:32:32,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:32:32,142 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1899 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 2920 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:32,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 2920 Invalid, 6154 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1024 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:32:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2023-11-23 21:32:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 4317. [2023-11-23 21:32:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 3014 states have (on average 1.528533510285335) internal successors, (4607), 3195 states have internal predecessors, (4607), 1019 states have call successors, (1019), 223 states have call predecessors, (1019), 283 states have return successors, (1155), 975 states have call predecessors, (1155), 1014 states have call successors, (1155) [2023-11-23 21:32:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 6781 transitions. [2023-11-23 21:32:32,631 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 6781 transitions. Word has length 73 [2023-11-23 21:32:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:32,632 INFO L495 AbstractCegarLoop]: Abstraction has 4317 states and 6781 transitions. [2023-11-23 21:32:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-23 21:32:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 6781 transitions. [2023-11-23 21:32:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 21:32:32,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:32,636 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:32:32,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:32,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash 841752789, now seen corresponding path program 1 times [2023-11-23 21:32:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:32,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227283340] [2023-11-23 21:32:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:32,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:32:33,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227283340] [2023-11-23 21:32:33,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227283340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:33,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:33,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:32:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126180398] [2023-11-23 21:32:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:32:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:32:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:32:33,113 INFO L87 Difference]: Start difference. First operand 4317 states and 6781 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-23 21:32:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:35,392 INFO L93 Difference]: Finished difference Result 8482 states and 13353 transitions. [2023-11-23 21:32:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:32:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2023-11-23 21:32:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:35,436 INFO L225 Difference]: With dead ends: 8482 [2023-11-23 21:32:35,436 INFO L226 Difference]: Without dead ends: 4749 [2023-11-23 21:32:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:32:35,457 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 894 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:35,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1388 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:32:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2023-11-23 21:32:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4407. [2023-11-23 21:32:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 3074 states have (on average 1.5227716330513987) internal successors, (4681), 3269 states have internal predecessors, (4681), 1021 states have call successors, (1021), 239 states have call predecessors, (1021), 311 states have return successors, (1193), 975 states have call predecessors, (1193), 1016 states have call successors, (1193) [2023-11-23 21:32:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 6895 transitions. [2023-11-23 21:32:35,935 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 6895 transitions. Word has length 75 [2023-11-23 21:32:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:35,937 INFO L495 AbstractCegarLoop]: Abstraction has 4407 states and 6895 transitions. [2023-11-23 21:32:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-23 21:32:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 6895 transitions. [2023-11-23 21:32:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 21:32:35,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:35,944 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] [2023-11-23 21:32:35,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:32:35,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:35,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:35,945 INFO L85 PathProgramCache]: Analyzing trace with hash -344343086, now seen corresponding path program 1 times [2023-11-23 21:32:35,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:35,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727622870] [2023-11-23 21:32:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:32:36,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727622870] [2023-11-23 21:32:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727622870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:36,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:36,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:32:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927408239] [2023-11-23 21:32:36,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:32:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:32:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:32:36,254 INFO L87 Difference]: Start difference. First operand 4407 states and 6895 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:32:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:37,145 INFO L93 Difference]: Finished difference Result 4509 states and 7061 transitions. [2023-11-23 21:32:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:32:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 79 [2023-11-23 21:32:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:37,184 INFO L225 Difference]: With dead ends: 4509 [2023-11-23 21:32:37,184 INFO L226 Difference]: Without dead ends: 4494 [2023-11-23 21:32:37,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:32:37,189 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 632 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:37,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1323 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:32:37,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2023-11-23 21:32:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4413. [2023-11-23 21:32:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 3080 states have (on average 1.5217532467532469) internal successors, (4687), 3275 states have internal predecessors, (4687), 1021 states have call successors, (1021), 239 states have call predecessors, (1021), 311 states have return successors, (1193), 975 states have call predecessors, (1193), 1016 states have call successors, (1193) [2023-11-23 21:32:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6901 transitions. [2023-11-23 21:32:37,618 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6901 transitions. Word has length 79 [2023-11-23 21:32:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:37,619 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 6901 transitions. [2023-11-23 21:32:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:32:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6901 transitions. [2023-11-23 21:32:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 21:32:37,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:37,622 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] [2023-11-23 21:32:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:32:37,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:37,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash 665639183, now seen corresponding path program 1 times [2023-11-23 21:32:37,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:37,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412720150] [2023-11-23 21:32:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:37,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:32:38,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:38,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412720150] [2023-11-23 21:32:38,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412720150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:38,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:38,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-23 21:32:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161085886] [2023-11-23 21:32:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:32:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:32:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:32:38,191 INFO L87 Difference]: Start difference. First operand 4413 states and 6901 transitions. Second operand has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 21:32:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:43,701 INFO L93 Difference]: Finished difference Result 4987 states and 7785 transitions. [2023-11-23 21:32:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 21:32:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 84 [2023-11-23 21:32:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:43,738 INFO L225 Difference]: With dead ends: 4987 [2023-11-23 21:32:43,738 INFO L226 Difference]: Without dead ends: 4970 [2023-11-23 21:32:43,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 21:32:43,745 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 2348 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 6436 mSolverCounterSat, 1234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2371 SdHoareTripleChecker+Valid, 3358 SdHoareTripleChecker+Invalid, 7670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1234 IncrementalHoareTripleChecker+Valid, 6436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:43,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2371 Valid, 3358 Invalid, 7670 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1234 Valid, 6436 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 21:32:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2023-11-23 21:32:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4717. [2023-11-23 21:32:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3322 states have (on average 1.5319084888621313) internal successors, (5089), 3515 states have internal predecessors, (5089), 1042 states have call successors, (1042), 281 states have call predecessors, (1042), 352 states have return successors, (1218), 997 states have call predecessors, (1218), 1037 states have call successors, (1218) [2023-11-23 21:32:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 7349 transitions. [2023-11-23 21:32:44,254 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 7349 transitions. Word has length 84 [2023-11-23 21:32:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:44,255 INFO L495 AbstractCegarLoop]: Abstraction has 4717 states and 7349 transitions. [2023-11-23 21:32:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 21:32:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 7349 transitions. [2023-11-23 21:32:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 21:32:44,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:44,260 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 21:32:44,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:32:44,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash -130156535, now seen corresponding path program 1 times [2023-11-23 21:32:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854756650] [2023-11-23 21:32:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:32:44,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:44,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854756650] [2023-11-23 21:32:44,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854756650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:44,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:44,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016820894] [2023-11-23 21:32:44,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:44,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:44,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:44,405 INFO L87 Difference]: Start difference. First operand 4717 states and 7349 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 21:32:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:45,133 INFO L93 Difference]: Finished difference Result 12060 states and 18919 transitions. [2023-11-23 21:32:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2023-11-23 21:32:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:45,184 INFO L225 Difference]: With dead ends: 12060 [2023-11-23 21:32:45,184 INFO L226 Difference]: Without dead ends: 7363 [2023-11-23 21:32:45,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:45,212 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 495 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:45,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1045 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:32:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2023-11-23 21:32:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 7272. [2023-11-23 21:32:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7272 states, 5136 states have (on average 1.5292056074766356) internal successors, (7854), 5447 states have internal predecessors, (7854), 1595 states have call successors, (1595), 425 states have call predecessors, (1595), 540 states have return successors, (1921), 1511 states have call predecessors, (1921), 1590 states have call successors, (1921) [2023-11-23 21:32:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7272 states to 7272 states and 11370 transitions. [2023-11-23 21:32:45,974 INFO L78 Accepts]: Start accepts. Automaton has 7272 states and 11370 transitions. Word has length 91 [2023-11-23 21:32:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:45,975 INFO L495 AbstractCegarLoop]: Abstraction has 7272 states and 11370 transitions. [2023-11-23 21:32:45,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 21:32:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7272 states and 11370 transitions. [2023-11-23 21:32:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 21:32:45,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:45,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:32:45,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:45,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1962961145, now seen corresponding path program 1 times [2023-11-23 21:32:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:45,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220176386] [2023-11-23 21:32:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:32:46,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220176386] [2023-11-23 21:32:46,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220176386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:46,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:46,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594009201] [2023-11-23 21:32:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:46,105 INFO L87 Difference]: Start difference. First operand 7272 states and 11370 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17)