./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:14,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:14,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:50:14,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:14,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:14,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:14,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:14,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:14,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:14,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:14,271 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:14,272 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:14,273 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:14,274 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:14,275 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:14,275 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:14,276 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:14,276 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:14,278 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:14,279 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:14,279 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:14,280 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:14,281 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:14,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:14,282 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:50:14,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:14,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:50:14,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:14,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:14,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:14,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:14,286 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:50:14,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:14,287 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:14,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:14,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:14,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:14,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:14,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:14,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:14,289 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:14,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:14,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:14,290 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:14,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:14,291 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_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2023-11-19 04:50:14,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:14,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:14,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:14,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:14,677 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:14,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-11-19 04:50:17,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:18,193 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:18,194 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-11-19 04:50:18,228 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/data/0fb0e6afd/0619dbde1ff740cb9cbc8e3d8c14b20e/FLAG62e6a1797 [2023-11-19 04:50:18,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/data/0fb0e6afd/0619dbde1ff740cb9cbc8e3d8c14b20e [2023-11-19 04:50:18,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:18,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:18,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:18,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:18,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:18,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5f9b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18, skipping insertion in model container [2023-11-19 04:50:18,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,357 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:18,922 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_e4a0ac59-9f48-475c-94b8-a5805068ba7a/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-11-19 04:50:18,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:18,972 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:18,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-19 04:50:18,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [64] [2023-11-19 04:50:18,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1592] [2023-11-19 04:50:18,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1958] [2023-11-19 04:50:18,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1996] [2023-11-19 04:50:18,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2090] [2023-11-19 04:50:18,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2208] [2023-11-19 04:50:18,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2390] [2023-11-19 04:50:18,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2740] [2023-11-19 04:50:18,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2749] [2023-11-19 04:50:19,104 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_e4a0ac59-9f48-475c-94b8-a5805068ba7a/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-11-19 04:50:19,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:19,153 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:19,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19 WrapperNode [2023-11-19 04:50:19,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:19,155 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:19,155 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:19,155 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:19,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,379 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 849 [2023-11-19 04:50:19,379 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:19,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:19,380 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:19,380 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:19,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,501 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,528 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:19,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:19,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:19,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:19,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (1/1) ... [2023-11-19 04:50:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:19,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:19,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a0ac59-9f48-475c-94b8-a5805068ba7a/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-19 04:50:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-19 04:50:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:50:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:50:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:50:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:50:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:50:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:50:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:50:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:50:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:50:19,653 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:50:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:50:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:50:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:50:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:50:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:50:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:50:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:50:19,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:50:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:50:19,658 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:50:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:50:19,659 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:50:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:50:19,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:50:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:50:19,660 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:50:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:50:19,661 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:50:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-11-19 04:50:19,661 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-11-19 04:50:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:50:19,661 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:50:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:50:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:50:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:50:19,662 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:50:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:50:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:50:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:50:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:50:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:50:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:50:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:19,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:50:19,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:50:19,868 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:19,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:21,258 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:22,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:22,238 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:50:22,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:22 BoogieIcfgContainer [2023-11-19 04:50:22,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:22,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:22,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:22,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:22,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:18" (1/3) ... [2023-11-19 04:50:22,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b22296d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:22, skipping insertion in model container [2023-11-19 04:50:22,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:19" (2/3) ... [2023-11-19 04:50:22,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b22296d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:22, skipping insertion in model container [2023-11-19 04:50:22,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:22" (3/3) ... [2023-11-19 04:50:22,269 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2023-11-19 04:50:22,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:22,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:22,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:22,393 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;@31091033, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:22,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-19 04:50:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:50:22,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:22,438 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] [2023-11-19 04:50:22,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:22,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1089089619, now seen corresponding path program 1 times [2023-11-19 04:50:22,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:22,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469877093] [2023-11-19 04:50:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:23,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469877093] [2023-11-19 04:50:23,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469877093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:23,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:23,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:50:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238407906] [2023-11-19 04:50:23,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:50:23,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:23,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:50:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:50:23,091 INFO L87 Difference]: Start difference. First operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-19 04:50:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:23,251 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2023-11-19 04:50:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:50:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 50 [2023-11-19 04:50:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:23,272 INFO L225 Difference]: With dead ends: 381 [2023-11-19 04:50:23,272 INFO L226 Difference]: Without dead ends: 359 [2023-11-19 04:50:23,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:50:23,280 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:23,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-19 04:50:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-19 04:50:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 242 states have (on average 1.5991735537190082) internal successors, (387), 263 states have internal predecessors, (387), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-19 04:50:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2023-11-19 04:50:23,399 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2023-11-19 04:50:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2023-11-19 04:50:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-19 04:50:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2023-11-19 04:50:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 04:50:23,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:23,411 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] [2023-11-19 04:50:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:23,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1805353403, now seen corresponding path program 1 times [2023-11-19 04:50:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887136846] [2023-11-19 04:50:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:24,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:24,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887136846] [2023-11-19 04:50:24,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887136846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:24,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:50:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562038117] [2023-11-19 04:50:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:24,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:50:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:50:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:50:24,168 INFO L87 Difference]: Start difference. First operand 359 states and 570 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-19 04:50:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:26,488 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2023-11-19 04:50:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:50:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2023-11-19 04:50:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:26,504 INFO L225 Difference]: With dead ends: 1163 [2023-11-19 04:50:26,511 INFO L226 Difference]: Without dead ends: 827 [2023-11-19 04:50:26,521 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 [2023-11-19 04:50:26,524 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1910 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:26,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 735 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:50:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-11-19 04:50:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2023-11-19 04:50:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 524 states have (on average 1.6278625954198473) internal successors, (853), 554 states have internal predecessors, (853), 177 states have call successors, (177), 37 states have call predecessors, (177), 38 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-11-19 04:50:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2023-11-19 04:50:26,637 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2023-11-19 04:50:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:26,638 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2023-11-19 04:50:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-19 04:50:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2023-11-19 04:50:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 04:50:26,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:26,643 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] [2023-11-19 04:50:26,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:26,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:26,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:26,645 INFO L85 PathProgramCache]: Analyzing trace with hash -976936461, now seen corresponding path program 1 times [2023-11-19 04:50:26,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:26,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522947843] [2023-11-19 04:50:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:26,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:27,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522947843] [2023-11-19 04:50:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522947843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:27,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:27,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:50:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019420850] [2023-11-19 04:50:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:50:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:50:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:50:27,418 INFO L87 Difference]: Start difference. First operand 740 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2023-11-19 04:50:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:30,266 INFO L93 Difference]: Finished difference Result 2506 states and 4147 transitions. [2023-11-19 04:50:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:50:30,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 73 [2023-11-19 04:50:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:30,285 INFO L225 Difference]: With dead ends: 2506 [2023-11-19 04:50:30,286 INFO L226 Difference]: Without dead ends: 1790 [2023-11-19 04:50:30,294 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 [2023-11-19 04:50:30,300 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1646 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:30,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 1688 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 04:50:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-11-19 04:50:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1703. [2023-11-19 04:50:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1236 states have (on average 1.6472491909385114) internal successors, (2036), 1296 states have internal predecessors, (2036), 379 states have call successors, (379), 76 states have call predecessors, (379), 87 states have return successors, (406), 354 states have call predecessors, (406), 374 states have call successors, (406) [2023-11-19 04:50:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2821 transitions. [2023-11-19 04:50:30,490 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2821 transitions. Word has length 73 [2023-11-19 04:50:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:30,491 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2821 transitions. [2023-11-19 04:50:30,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2023-11-19 04:50:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2821 transitions. [2023-11-19 04:50:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 04:50:30,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:30,496 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] [2023-11-19 04:50:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:30,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:30,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1841493947, now seen corresponding path program 1 times [2023-11-19 04:50:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:30,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397407801] [2023-11-19 04:50:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:31,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397407801] [2023-11-19 04:50:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397407801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:31,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:31,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:50:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140594030] [2023-11-19 04:50:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:31,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:50:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:50:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:50:31,075 INFO L87 Difference]: Start difference. First operand 1703 states and 2821 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 04:50:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:34,360 INFO L93 Difference]: Finished difference Result 4677 states and 7767 transitions. [2023-11-19 04:50:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:50:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 76 [2023-11-19 04:50:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:34,390 INFO L225 Difference]: With dead ends: 4677 [2023-11-19 04:50:34,391 INFO L226 Difference]: Without dead ends: 2997 [2023-11-19 04:50:34,402 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 [2023-11-19 04:50:34,407 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1283 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:34,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1991 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 04:50:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2023-11-19 04:50:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2792. [2023-11-19 04:50:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 1995 states have (on average 1.6340852130325814) internal successors, (3260), 2098 states have internal predecessors, (3260), 660 states have call successors, (660), 112 states have call predecessors, (660), 136 states have return successors, (705), 626 states have call predecessors, (705), 655 states have call successors, (705) [2023-11-19 04:50:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4625 transitions. [2023-11-19 04:50:34,671 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4625 transitions. Word has length 76 [2023-11-19 04:50:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:34,672 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4625 transitions. [2023-11-19 04:50:34,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 04:50:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4625 transitions. [2023-11-19 04:50:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 04:50:34,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:34,676 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] [2023-11-19 04:50:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:50:34,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:34,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:34,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1342247211, now seen corresponding path program 1 times [2023-11-19 04:50:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344349231] [2023-11-19 04:50:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:34,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:34,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344349231] [2023-11-19 04:50:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344349231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:50:34,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541361869] [2023-11-19 04:50:34,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:50:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:50:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:50:35,001 INFO L87 Difference]: Start difference. First operand 2792 states and 4625 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:50:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:35,361 INFO L93 Difference]: Finished difference Result 4941 states and 8201 transitions. [2023-11-19 04:50:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:50:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2023-11-19 04:50:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:35,396 INFO L225 Difference]: With dead ends: 4941 [2023-11-19 04:50:35,396 INFO L226 Difference]: Without dead ends: 2856 [2023-11-19 04:50:35,409 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 [2023-11-19 04:50:35,412 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:35,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:50:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2023-11-19 04:50:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2832. [2023-11-19 04:50:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2025 states have (on average 1.6246913580246913) internal successors, (3290), 2128 states have internal predecessors, (3290), 660 states have call successors, (660), 112 states have call predecessors, (660), 146 states have return successors, (725), 636 states have call predecessors, (725), 655 states have call successors, (725) [2023-11-19 04:50:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 4675 transitions. [2023-11-19 04:50:35,719 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 4675 transitions. Word has length 77 [2023-11-19 04:50:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:35,720 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 4675 transitions. [2023-11-19 04:50:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:50:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 4675 transitions. [2023-11-19 04:50:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 04:50:35,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:35,724 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] [2023-11-19 04:50:35,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:35,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:35,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2020689901, now seen corresponding path program 1 times [2023-11-19 04:50:35,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:35,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775515896] [2023-11-19 04:50:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:36,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775515896] [2023-11-19 04:50:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775515896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:36,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:36,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:50:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565441258] [2023-11-19 04:50:36,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:36,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:50:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:50:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:50:36,273 INFO L87 Difference]: Start difference. First operand 2832 states and 4675 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 04:50:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:38,831 INFO L93 Difference]: Finished difference Result 7042 states and 11647 transitions. [2023-11-19 04:50:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:50:38,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-11-19 04:50:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:38,878 INFO L225 Difference]: With dead ends: 7042 [2023-11-19 04:50:38,878 INFO L226 Difference]: Without dead ends: 4725 [2023-11-19 04:50:38,896 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 [2023-11-19 04:50:38,897 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 2250 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:38,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 1356 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:50:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2023-11-19 04:50:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 4590. [2023-11-19 04:50:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 3214 states have (on average 1.5821406347230864) internal successors, (5085), 3395 states have internal predecessors, (5085), 1116 states have call successors, (1116), 199 states have call predecessors, (1116), 259 states have return successors, (1252), 1073 states have call predecessors, (1252), 1111 states have call successors, (1252) [2023-11-19 04:50:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 7453 transitions. [2023-11-19 04:50:39,381 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 7453 transitions. Word has length 81 [2023-11-19 04:50:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:39,383 INFO L495 AbstractCegarLoop]: Abstraction has 4590 states and 7453 transitions. [2023-11-19 04:50:39,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 04:50:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 7453 transitions. [2023-11-19 04:50:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 04:50:39,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:39,387 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] [2023-11-19 04:50:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:50:39,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:39,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -60428219, now seen corresponding path program 1 times [2023-11-19 04:50:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263368848] [2023-11-19 04:50:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:50:39,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263368848] [2023-11-19 04:50:39,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263368848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:39,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 04:50:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258943864] [2023-11-19 04:50:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:39,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:50:39,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:50:39,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:50:39,976 INFO L87 Difference]: Start difference. First operand 4590 states and 7453 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-19 04:50:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:44,597 INFO L93 Difference]: Finished difference Result 9423 states and 15539 transitions. [2023-11-19 04:50:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 04:50:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 84 [2023-11-19 04:50:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:44,640 INFO L225 Difference]: With dead ends: 9423 [2023-11-19 04:50:44,640 INFO L226 Difference]: Without dead ends: 4808 [2023-11-19 04:50:44,669 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 [2023-11-19 04:50:44,670 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 2051 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:44,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2069 Valid, 3258 Invalid, 6244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1114 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-19 04:50:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2023-11-19 04:50:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4626. [2023-11-19 04:50:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 3239 states have (on average 1.54492127199753) internal successors, (5004), 3420 states have internal predecessors, (5004), 1121 states have call successors, (1121), 205 states have call predecessors, (1121), 265 states have return successors, (1257), 1077 states have call predecessors, (1257), 1116 states have call successors, (1257) [2023-11-19 04:50:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7382 transitions. [2023-11-19 04:50:45,193 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7382 transitions. Word has length 84 [2023-11-19 04:50:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:45,194 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7382 transitions. [2023-11-19 04:50:45,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-19 04:50:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7382 transitions. [2023-11-19 04:50:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 04:50:45,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:45,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:50:45,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:45,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -62098993, now seen corresponding path program 1 times [2023-11-19 04:50:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:45,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189622908] [2023-11-19 04:50:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:50:45,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189622908] [2023-11-19 04:50:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189622908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:45,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:50:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000706840] [2023-11-19 04:50:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:50:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:50:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:50:45,675 INFO L87 Difference]: Start difference. First operand 4626 states and 7382 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:50:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:47,965 INFO L93 Difference]: Finished difference Result 9171 states and 14674 transitions. [2023-11-19 04:50:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:50:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2023-11-19 04:50:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:48,025 INFO L225 Difference]: With dead ends: 9171 [2023-11-19 04:50:48,025 INFO L226 Difference]: Without dead ends: 5174 [2023-11-19 04:50:48,051 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 [2023-11-19 04:50:48,053 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 931 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:48,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1580 Invalid, 2491 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [380 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:50:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2023-11-19 04:50:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4716. [2023-11-19 04:50:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 3299 states have (on average 1.5392543194907549) internal successors, (5078), 3494 states have internal predecessors, (5078), 1123 states have call successors, (1123), 221 states have call predecessors, (1123), 293 states have return successors, (1295), 1077 states have call predecessors, (1295), 1118 states have call successors, (1295) [2023-11-19 04:50:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 7496 transitions. [2023-11-19 04:50:48,700 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 7496 transitions. Word has length 86 [2023-11-19 04:50:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:48,701 INFO L495 AbstractCegarLoop]: Abstraction has 4716 states and 7496 transitions. [2023-11-19 04:50:48,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:50:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 7496 transitions. [2023-11-19 04:50:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 04:50:48,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:48,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:48,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:50:48,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:48,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash 222337808, now seen corresponding path program 1 times [2023-11-19 04:50:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:48,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633616504] [2023-11-19 04:50:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:50:49,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633616504] [2023-11-19 04:50:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633616504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:49,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:50:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429349877] [2023-11-19 04:50:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:49,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:50:49,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:49,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:50:49,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:50:49,040 INFO L87 Difference]: Start difference. First operand 4716 states and 7496 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:50:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:50,047 INFO L93 Difference]: Finished difference Result 4818 states and 7662 transitions. [2023-11-19 04:50:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:50:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-19 04:50:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:50,077 INFO L225 Difference]: With dead ends: 4818 [2023-11-19 04:50:50,077 INFO L226 Difference]: Without dead ends: 4803 [2023-11-19 04:50:50,081 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 [2023-11-19 04:50:50,084 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 623 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:50,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1721 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:50:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2023-11-19 04:50:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 4722. [2023-11-19 04:50:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 3305 states have (on average 1.5382753403933433) internal successors, (5084), 3500 states have internal predecessors, (5084), 1123 states have call successors, (1123), 221 states have call predecessors, (1123), 293 states have return successors, (1295), 1077 states have call predecessors, (1295), 1118 states have call successors, (1295) [2023-11-19 04:50:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 7502 transitions. [2023-11-19 04:50:50,558 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 7502 transitions. Word has length 93 [2023-11-19 04:50:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:50,560 INFO L495 AbstractCegarLoop]: Abstraction has 4722 states and 7502 transitions. [2023-11-19 04:50:50,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:50:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 7502 transitions. [2023-11-19 04:50:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 04:50:50,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:50,565 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] [2023-11-19 04:50:50,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:50:50,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:50,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash 946164665, now seen corresponding path program 1 times [2023-11-19 04:50:50,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:50,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128858134] [2023-11-19 04:50:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:50:51,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:51,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128858134] [2023-11-19 04:50:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128858134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 04:50:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492190400] [2023-11-19 04:50:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:50:51,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:50:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:50:51,254 INFO L87 Difference]: Start difference. First operand 4722 states and 7502 transitions. Second operand has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:50:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:56,698 INFO L93 Difference]: Finished difference Result 5298 states and 8396 transitions. [2023-11-19 04:50:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-19 04:50:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2023-11-19 04:50:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:56,732 INFO L225 Difference]: With dead ends: 5298 [2023-11-19 04:50:56,733 INFO L226 Difference]: Without dead ends: 5281 [2023-11-19 04:50:56,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:50:56,739 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 2577 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2600 SdHoareTripleChecker+Valid, 3690 SdHoareTripleChecker+Invalid, 7802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 6434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:56,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2600 Valid, 3690 Invalid, 7802 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1368 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-19 04:50:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2023-11-19 04:50:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 5004. [2023-11-19 04:50:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 3531 states have (on average 1.5465873690172756) internal successors, (5461), 3724 states have internal predecessors, (5461), 1142 states have call successors, (1142), 259 states have call predecessors, (1142), 330 states have return successors, (1318), 1097 states have call predecessors, (1318), 1137 states have call successors, (1318) [2023-11-19 04:50:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 7921 transitions. [2023-11-19 04:50:57,300 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 7921 transitions. Word has length 95 [2023-11-19 04:50:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:57,301 INFO L495 AbstractCegarLoop]: Abstraction has 5004 states and 7921 transitions. [2023-11-19 04:50:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:50:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 7921 transitions. [2023-11-19 04:50:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:50:57,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:57,305 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:57,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:50:57,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:57,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash 277157457, now seen corresponding path program 1 times [2023-11-19 04:50:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:57,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251305736] [2023-11-19 04:50:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:57,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat