./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/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_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:21:48,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:21:48,253 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:21:48,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:21:48,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:21:48,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:21:48,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:21:48,300 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:21:48,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:21:48,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:21:48,306 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:21:48,307 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:21:48,308 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:21:48,309 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:21:48,310 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:21:48,311 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:21:48,311 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:21:48,312 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:21:48,312 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:21:48,313 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:21:48,313 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:21:48,314 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:21:48,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:21:48,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:21:48,316 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:21:48,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:21:48,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:21:48,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:21:48,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:21:48,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:21:48,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:21:48,320 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:21:48,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:21:48,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:21:48,321 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:21:48,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:21:48,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:21:48,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:48,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:21:48,324 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:21:48,324 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:21:48,325 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:21:48,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:21:48,325 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:21:48,326 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:21:48,326 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:21:48,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:21:48,327 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_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2023-11-24 23:21:48,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:21:48,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:21:48,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:21:48,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:21:48,682 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:21:48,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-11-24 23:21:51,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:21:52,378 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:21:52,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-11-24 23:21:52,403 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/data/eeebee27b/2f5714e559f542e78047028416e00d0d/FLAGdb4512d4a [2023-11-24 23:21:52,418 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/data/eeebee27b/2f5714e559f542e78047028416e00d0d [2023-11-24 23:21:52,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:21:52,422 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:21:52,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:52,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:21:52,429 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:21:52,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:52" (1/1) ... [2023-11-24 23:21:52,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790429ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:52, skipping insertion in model container [2023-11-24 23:21:52,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:52" (1/1) ... [2023-11-24 23:21:52,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:21:53,084 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_2b03cc55-959b-4bb2-a149-3fffaa974ee4/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-11-24 23:21:53,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:53,148 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:21:53,159 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-24 23:21:53,161 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [64] [2023-11-24 23:21:53,161 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1592] [2023-11-24 23:21:53,161 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1958] [2023-11-24 23:21:53,161 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1996] [2023-11-24 23:21:53,162 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2090] [2023-11-24 23:21:53,162 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2208] [2023-11-24 23:21:53,162 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2390] [2023-11-24 23:21:53,162 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2740] [2023-11-24 23:21:53,163 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2749] [2023-11-24 23:21:53,307 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_2b03cc55-959b-4bb2-a149-3fffaa974ee4/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-11-24 23:21:53,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:53,351 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:21:53,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53 WrapperNode [2023-11-24 23:21:53,352 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:53,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:53,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:21:53,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:21:53,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,499 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 849 [2023-11-24 23:21:53,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:53,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:21:53,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:21:53,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:21:53,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,590 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,625 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:21:53,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:21:53,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:21:53,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:21:53,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (1/1) ... [2023-11-24 23:21:53,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:53,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:53,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:21:53,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b03cc55-959b-4bb2-a149-3fffaa974ee4/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:21:53,781 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:21:53,782 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:21:53,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:21:53,782 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:21:53,782 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:21:53,783 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:21:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:21:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:21:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:21:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:21:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:21:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:21:53,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:21:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:21:53,787 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:21:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:21:53,789 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:21:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:21:53,790 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:21:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:21:53,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:21:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:21:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:21:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:21:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:21:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:21:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:21:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:21:53,792 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:21:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:21:53,792 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:21:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-11-24 23:21:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-11-24 23:21:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:21:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:21:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:21:53,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:21:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:21:53,794 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:21:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:21:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:21:53,794 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:21:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:21:53,794 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:21:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:21:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:21:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:21:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:21:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:21:53,796 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:21:53,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:21:53,990 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:21:55,255 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:21:56,223 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:21:56,224 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:21:56,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:56 BoogieIcfgContainer [2023-11-24 23:21:56,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:21:56,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:21:56,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:21:56,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:21:56,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:21:52" (1/3) ... [2023-11-24 23:21:56,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292bb8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:56, skipping insertion in model container [2023-11-24 23:21:56,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:53" (2/3) ... [2023-11-24 23:21:56,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292bb8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:56, skipping insertion in model container [2023-11-24 23:21:56,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:56" (3/3) ... [2023-11-24 23:21:56,237 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2023-11-24 23:21:56,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:21:56,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:21:56,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:21:56,344 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;@22e11b51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:21:56,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:21:56,352 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) [2023-11-24 23:21:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-24 23:21:56,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:56,382 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] [2023-11-24 23:21:56,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:56,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1885651054, now seen corresponding path program 1 times [2023-11-24 23:21:56,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:56,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648906565] [2023-11-24 23:21:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:21:57,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:57,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648906565] [2023-11-24 23:21:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648906565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:57,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:57,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:21:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392074287] [2023-11-24 23:21:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:57,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:21:57,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:21:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:21:57,089 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) [2023-11-24 23:21:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:57,252 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2023-11-24 23:21:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:21:57,269 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 [2023-11-24 23:21:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:57,301 INFO L225 Difference]: With dead ends: 381 [2023-11-24 23:21:57,301 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 23:21:57,306 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 [2023-11-24 23:21:57,313 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 [2023-11-24 23:21:57,315 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] [2023-11-24 23:21:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 23:21:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 23:21:57,406 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) [2023-11-24 23:21:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2023-11-24 23:21:57,415 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2023-11-24 23:21:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:57,416 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2023-11-24 23:21:57,417 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) [2023-11-24 23:21:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2023-11-24 23:21:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:21:57,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:57,421 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] [2023-11-24 23:21:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:21:57,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:57,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 902523787, now seen corresponding path program 1 times [2023-11-24 23:21:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764241689] [2023-11-24 23:21:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:21:58,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:58,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764241689] [2023-11-24 23:21:58,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764241689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:58,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:58,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:58,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442266041] [2023-11-24 23:21:58,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:58,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:58,224 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) [2023-11-24 23:22:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:00,784 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2023-11-24 23:22:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:22:00,785 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 [2023-11-24 23:22:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:00,795 INFO L225 Difference]: With dead ends: 1163 [2023-11-24 23:22:00,795 INFO L226 Difference]: Without dead ends: 827 [2023-11-24 23:22:00,800 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 [2023-11-24 23:22:00,802 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1910 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:00,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 735 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-24 23:22:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-11-24 23:22:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2023-11-24 23:22:00,930 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) [2023-11-24 23:22:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2023-11-24 23:22:00,942 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2023-11-24 23:22:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:00,943 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2023-11-24 23:22:00,943 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) [2023-11-24 23:22:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2023-11-24 23:22:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 23:22:00,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:00,950 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] [2023-11-24 23:22:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:22:00,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:00,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1559231367, now seen corresponding path program 1 times [2023-11-24 23:22:00,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113642649] [2023-11-24 23:22:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:00,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:22:01,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:01,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113642649] [2023-11-24 23:22:01,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113642649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:01,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:01,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:01,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841187306] [2023-11-24 23:22:01,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:01,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:01,572 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) [2023-11-24 23:22:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:04,344 INFO L93 Difference]: Finished difference Result 2506 states and 4147 transitions. [2023-11-24 23:22:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:22:04,345 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 [2023-11-24 23:22:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:04,362 INFO L225 Difference]: With dead ends: 2506 [2023-11-24 23:22:04,363 INFO L226 Difference]: Without dead ends: 1790 [2023-11-24 23:22:04,373 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 [2023-11-24 23:22:04,376 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1646 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:04,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 1688 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-24 23:22:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-11-24 23:22:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1703. [2023-11-24 23:22:04,535 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) [2023-11-24 23:22:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2821 transitions. [2023-11-24 23:22:04,555 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2821 transitions. Word has length 73 [2023-11-24 23:22:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:04,557 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2821 transitions. [2023-11-24 23:22:04,557 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) [2023-11-24 23:22:04,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2821 transitions. [2023-11-24 23:22:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:22:04,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:04,563 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] [2023-11-24 23:22:04,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:22:04,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:04,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash 393474966, now seen corresponding path program 1 times [2023-11-24 23:22:04,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242626873] [2023-11-24 23:22:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:04,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:22:05,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242626873] [2023-11-24 23:22:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242626873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:05,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:05,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:22:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325438451] [2023-11-24 23:22:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:05,156 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) [2023-11-24 23:22:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:08,672 INFO L93 Difference]: Finished difference Result 4677 states and 7767 transitions. [2023-11-24 23:22:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 23:22:08,672 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 [2023-11-24 23:22:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:08,710 INFO L225 Difference]: With dead ends: 4677 [2023-11-24 23:22:08,710 INFO L226 Difference]: Without dead ends: 2997 [2023-11-24 23:22:08,725 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 [2023-11-24 23:22:08,736 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1283 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:08,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1991 Invalid, 4416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [610 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-24 23:22:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2023-11-24 23:22:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2792. [2023-11-24 23:22:08,979 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) [2023-11-24 23:22:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4625 transitions. [2023-11-24 23:22:09,007 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4625 transitions. Word has length 76 [2023-11-24 23:22:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:09,008 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4625 transitions. [2023-11-24 23:22:09,008 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) [2023-11-24 23:22:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4625 transitions. [2023-11-24 23:22:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:22:09,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:09,012 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] [2023-11-24 23:22:09,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:22:09,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:09,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1898589688, now seen corresponding path program 1 times [2023-11-24 23:22:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:09,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388637839] [2023-11-24 23:22:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:22:09,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388637839] [2023-11-24 23:22:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388637839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:09,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:22:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255036489] [2023-11-24 23:22:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:22:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:22:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:22:09,316 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) [2023-11-24 23:22:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:09,667 INFO L93 Difference]: Finished difference Result 4941 states and 8201 transitions. [2023-11-24 23:22:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:09,668 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 [2023-11-24 23:22:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:09,696 INFO L225 Difference]: With dead ends: 4941 [2023-11-24 23:22:09,696 INFO L226 Difference]: Without dead ends: 2856 [2023-11-24 23:22:09,709 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 [2023-11-24 23:22:09,710 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 [2023-11-24 23:22:09,711 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] [2023-11-24 23:22:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2023-11-24 23:22:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2832. [2023-11-24 23:22:09,990 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) [2023-11-24 23:22:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 4675 transitions. [2023-11-24 23:22:10,010 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 4675 transitions. Word has length 77 [2023-11-24 23:22:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:10,011 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 4675 transitions. [2023-11-24 23:22:10,011 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) [2023-11-24 23:22:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 4675 transitions. [2023-11-24 23:22:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 23:22:10,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:10,015 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] [2023-11-24 23:22:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:22:10,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:10,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1360653072, now seen corresponding path program 1 times [2023-11-24 23:22:10,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:10,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079332856] [2023-11-24 23:22:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:22:10,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079332856] [2023-11-24 23:22:10,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079332856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:10,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:10,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:22:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915605937] [2023-11-24 23:22:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:22:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:22:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:22:10,553 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) [2023-11-24 23:22:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:13,304 INFO L93 Difference]: Finished difference Result 7042 states and 11647 transitions. [2023-11-24 23:22:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:22:13,304 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 [2023-11-24 23:22:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:13,343 INFO L225 Difference]: With dead ends: 7042 [2023-11-24 23:22:13,343 INFO L226 Difference]: Without dead ends: 4725 [2023-11-24 23:22:13,358 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 [2023-11-24 23:22:13,359 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 2250 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:13,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 1356 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:22:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2023-11-24 23:22:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 4590. [2023-11-24 23:22:13,828 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) [2023-11-24 23:22:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 7453 transitions. [2023-11-24 23:22:13,860 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 7453 transitions. Word has length 81 [2023-11-24 23:22:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:13,860 INFO L495 AbstractCegarLoop]: Abstraction has 4590 states and 7453 transitions. [2023-11-24 23:22:13,861 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) [2023-11-24 23:22:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 7453 transitions. [2023-11-24 23:22:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 23:22:13,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:13,866 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] [2023-11-24 23:22:13,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:22:13,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:13,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash -25854062, now seen corresponding path program 1 times [2023-11-24 23:22:13,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:13,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72530449] [2023-11-24 23:22:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:22:14,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72530449] [2023-11-24 23:22:14,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72530449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:14,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:22:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546528733] [2023-11-24 23:22:14,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:14,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:22:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:22:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:22:14,466 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) [2023-11-24 23:22:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:19,410 INFO L93 Difference]: Finished difference Result 9423 states and 15539 transitions. [2023-11-24 23:22:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-24 23:22:19,411 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 [2023-11-24 23:22:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:19,458 INFO L225 Difference]: With dead ends: 9423 [2023-11-24 23:22:19,458 INFO L226 Difference]: Without dead ends: 4808 [2023-11-24 23:22:19,490 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 [2023-11-24 23:22:19,491 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 2051 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:19,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2069 Valid, 3258 Invalid, 6244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1114 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-24 23:22:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2023-11-24 23:22:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4626. [2023-11-24 23:22:19,976 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) [2023-11-24 23:22:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7382 transitions. [2023-11-24 23:22:20,006 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7382 transitions. Word has length 84 [2023-11-24 23:22:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:20,007 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7382 transitions. [2023-11-24 23:22:20,008 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) [2023-11-24 23:22:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7382 transitions. [2023-11-24 23:22:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-24 23:22:20,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:20,013 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] [2023-11-24 23:22:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:22:20,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1642672924, now seen corresponding path program 1 times [2023-11-24 23:22:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:20,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006788907] [2023-11-24 23:22:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:20,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:22:20,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:20,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006788907] [2023-11-24 23:22:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006788907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:20,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:20,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:22:20,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946762724] [2023-11-24 23:22:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:22:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:22:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:22:20,492 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) [2023-11-24 23:22:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:23,081 INFO L93 Difference]: Finished difference Result 9171 states and 14674 transitions. [2023-11-24 23:22:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:22:23,082 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 [2023-11-24 23:22:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:23,138 INFO L225 Difference]: With dead ends: 9171 [2023-11-24 23:22:23,138 INFO L226 Difference]: Without dead ends: 5174 [2023-11-24 23:22:23,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:22:23,164 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 931 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:23,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1580 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-24 23:22:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2023-11-24 23:22:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4716. [2023-11-24 23:22:23,698 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) [2023-11-24 23:22:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 7496 transitions. [2023-11-24 23:22:23,738 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 7496 transitions. Word has length 86 [2023-11-24 23:22:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:23,739 INFO L495 AbstractCegarLoop]: Abstraction has 4716 states and 7496 transitions. [2023-11-24 23:22:23,739 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) [2023-11-24 23:22:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 7496 transitions. [2023-11-24 23:22:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 23:22:23,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:23,743 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] [2023-11-24 23:22:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:22:23,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:23,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:23,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2045128252, now seen corresponding path program 1 times [2023-11-24 23:22:23,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286718219] [2023-11-24 23:22:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:23,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:22:24,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:24,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286718219] [2023-11-24 23:22:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286718219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:24,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:24,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:22:24,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035830310] [2023-11-24 23:22:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:24,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:22:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:22:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:22:24,190 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) [2023-11-24 23:22:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:25,072 INFO L93 Difference]: Finished difference Result 4818 states and 7662 transitions. [2023-11-24 23:22:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:22:25,075 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 [2023-11-24 23:22:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:25,105 INFO L225 Difference]: With dead ends: 4818 [2023-11-24 23:22:25,105 INFO L226 Difference]: Without dead ends: 4803 [2023-11-24 23:22:25,107 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 [2023-11-24 23:22:25,109 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 623 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:25,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1721 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:22:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2023-11-24 23:22:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 4722. [2023-11-24 23:22:25,514 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) [2023-11-24 23:22:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 7502 transitions. [2023-11-24 23:22:25,537 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 7502 transitions. Word has length 93 [2023-11-24 23:22:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:25,538 INFO L495 AbstractCegarLoop]: Abstraction has 4722 states and 7502 transitions. [2023-11-24 23:22:25,538 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) [2023-11-24 23:22:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 7502 transitions. [2023-11-24 23:22:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-24 23:22:25,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:25,542 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] [2023-11-24 23:22:25,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:22:25,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:25,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1486550297, now seen corresponding path program 1 times [2023-11-24 23:22:25,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:25,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738495112] [2023-11-24 23:22:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:25,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:22:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:22:26,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:22:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738495112] [2023-11-24 23:22:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738495112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:22:26,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:22:26,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 23:22:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042900514] [2023-11-24 23:22:26,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:22:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:22:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:22:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:22:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:22:26,302 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) [2023-11-24 23:22:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:22:31,552 INFO L93 Difference]: Finished difference Result 5298 states and 8396 transitions. [2023-11-24 23:22:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-24 23:22:31,553 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 [2023-11-24 23:22:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:22:31,590 INFO L225 Difference]: With dead ends: 5298 [2023-11-24 23:22:31,590 INFO L226 Difference]: Without dead ends: 5281 [2023-11-24 23:22:31,595 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 [2023-11-24 23:22:31,596 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 2577 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s 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, 4.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:22:31,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2600 Valid, 3690 Invalid, 7802 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1368 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-24 23:22:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2023-11-24 23:22:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 5004. [2023-11-24 23:22:32,263 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) [2023-11-24 23:22:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 7921 transitions. [2023-11-24 23:22:32,309 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 7921 transitions. Word has length 95 [2023-11-24 23:22:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:22:32,310 INFO L495 AbstractCegarLoop]: Abstraction has 5004 states and 7921 transitions. [2023-11-24 23:22:32,310 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) [2023-11-24 23:22:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 7921 transitions. [2023-11-24 23:22:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-24 23:22:32,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:22:32,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:22:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:22:32,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:22:32,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:22:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -456433715, now seen corresponding path program 1 times [2023-11-24 23:22:32,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:22:32,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776703232] [2023-11-24 23:22:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:22:32,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:22:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat