./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX --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 e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:52:33,102 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:52:33,217 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:52:33,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:52:33,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:52:33,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:52:33,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:52:33,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:52:33,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:52:33,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:52:33,283 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:52:33,284 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:52:33,285 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:52:33,287 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:52:33,287 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:52:33,288 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:52:33,288 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:52:33,288 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:52:33,289 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:52:33,289 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:52:33,290 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:52:33,290 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:52:33,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:52:33,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:52:33,293 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:52:33,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:52:33,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:52:33,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:52:33,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:52:33,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:52:33,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:52:33,297 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:52:33,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:52:33,297 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:52:33,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:52:33,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:52:33,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:33,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:52:33,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:52:33,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:52:33,299 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:52:33,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:52:33,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:52:33,300 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:52:33,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:52:33,301 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_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2023-11-12 00:52:33,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:52:33,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:52:33,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:52:33,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:52:33,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:52:33,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2023-11-12 00:52:36,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:52:37,229 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:52:37,229 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2023-11-12 00:52:37,254 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/data/a02e34059/827b2eae1d264891a23f16e8388a75a6/FLAG4c8c9a1e2 [2023-11-12 00:52:37,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/data/a02e34059/827b2eae1d264891a23f16e8388a75a6 [2023-11-12 00:52:37,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:52:37,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:52:37,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:37,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:52:37,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:52:37,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:37" (1/1) ... [2023-11-12 00:52:37,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40aedc28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:37, skipping insertion in model container [2023-11-12 00:52:37,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:37" (1/1) ... [2023-11-12 00:52:37,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:52:37,940 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_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2023-11-12 00:52:38,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:38,090 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:52:38,101 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [48] [2023-11-12 00:52:38,103 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [236] [2023-11-12 00:52:38,103 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1824] [2023-11-12 00:52:38,103 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1833] [2023-11-12 00:52:38,104 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2199] [2023-11-12 00:52:38,104 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2861] [2023-11-12 00:52:38,104 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2875] [2023-11-12 00:52:38,105 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2913] [2023-11-12 00:52:38,105 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3006] [2023-11-12 00:52:38,105 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3356] [2023-11-12 00:52:38,232 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_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2023-11-12 00:52:38,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:38,332 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:52:38,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38 WrapperNode [2023-11-12 00:52:38,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:38,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:38,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:52:38,335 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:52:38,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,454 INFO L138 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1133 [2023-11-12 00:52:38,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:38,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:52:38,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:52:38,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:52:38,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:52:38,536 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:52:38,536 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:52:38,536 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:52:38,537 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (1/1) ... [2023-11-12 00:52:38,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:38,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:52:38,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddd85e7a-a376-43f7-8bf4-c66d40a2f2f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:52:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:52:38,630 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:52:38,630 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:52:38,630 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-12 00:52:38,630 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-12 00:52:38,631 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-11-12 00:52:38,631 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-11-12 00:52:38,631 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:52:38,631 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:52:38,631 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-12 00:52:38,632 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-12 00:52:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:52:38,632 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:52:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:52:38,633 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:52:38,633 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:52:38,633 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:52:38,633 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:52:38,633 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:52:38,634 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-12 00:52:38,634 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-12 00:52:38,634 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:52:38,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:52:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:52:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:52:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:52:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:52:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:52:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:52:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 00:52:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 00:52:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:52:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:52:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:52:38,637 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:52:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:52:38,637 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:52:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:52:38,638 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:52:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:52:38,638 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:52:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:52:38,639 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:52:38,639 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:52:38,639 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:52:38,639 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:52:38,639 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:52:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:52:38,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:52:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:52:38,640 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:52:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:52:38,641 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-12 00:52:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-12 00:52:38,802 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:52:38,806 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:52:40,097 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:52:41,048 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:52:41,048 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:52:41,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:41 BoogieIcfgContainer [2023-11-12 00:52:41,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:52:41,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:52:41,056 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:52:41,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:52:41,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:52:37" (1/3) ... [2023-11-12 00:52:41,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197458e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:41, skipping insertion in model container [2023-11-12 00:52:41,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:38" (2/3) ... [2023-11-12 00:52:41,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197458e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:41, skipping insertion in model container [2023-11-12 00:52:41,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:41" (3/3) ... [2023-11-12 00:52:41,063 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2023-11-12 00:52:41,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:52:41,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:52:41,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:41,162 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;@76928599, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:41,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:52:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-12 00:52:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 00:52:41,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:41,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:41,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:41,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -412004903, now seen corresponding path program 1 times [2023-11-12 00:52:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711743247] [2023-11-12 00:52:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:41,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:41,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711743247] [2023-11-12 00:52:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711743247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:41,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:41,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:52:41,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962955332] [2023-11-12 00:52:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:41,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:52:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:52:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:52:41,815 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:52:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:42,068 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2023-11-12 00:52:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:52:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-11-12 00:52:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:42,092 INFO L225 Difference]: With dead ends: 401 [2023-11-12 00:52:42,092 INFO L226 Difference]: Without dead ends: 379 [2023-11-12 00:52:42,096 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 [2023-11-12 00:52:42,102 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:42,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-12 00:52:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-11-12 00:52:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-12 00:52:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2023-11-12 00:52:42,199 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2023-11-12 00:52:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:42,201 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2023-11-12 00:52:42,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:52:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2023-11-12 00:52:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:52:42,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:42,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:52:42,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:42,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2039784009, now seen corresponding path program 1 times [2023-11-12 00:52:42,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:42,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935403841] [2023-11-12 00:52:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:52:42,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935403841] [2023-11-12 00:52:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935403841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:42,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:42,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001725064] [2023-11-12 00:52:42,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:52:42,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:52:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:52:42,751 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 00:52:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:45,072 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2023-11-12 00:52:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:52:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-11-12 00:52:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:45,084 INFO L225 Difference]: With dead ends: 1243 [2023-11-12 00:52:45,084 INFO L226 Difference]: Without dead ends: 880 [2023-11-12 00:52:45,094 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 [2023-11-12 00:52:45,099 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1225 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:45,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 1030 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 00:52:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-11-12 00:52:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2023-11-12 00:52:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2023-11-12 00:52:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2023-11-12 00:52:45,280 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2023-11-12 00:52:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:45,281 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2023-11-12 00:52:45,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 00:52:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2023-11-12 00:52:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:52:45,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:45,298 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:52:45,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:45,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 234170480, now seen corresponding path program 1 times [2023-11-12 00:52:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:45,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547482760] [2023-11-12 00:52:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:52:45,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:45,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547482760] [2023-11-12 00:52:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547482760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:45,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:45,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:52:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914922594] [2023-11-12 00:52:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:45,805 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:52:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:48,310 INFO L93 Difference]: Finished difference Result 2479 states and 4037 transitions. [2023-11-12 00:52:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:52:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2023-11-12 00:52:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:48,330 INFO L225 Difference]: With dead ends: 2479 [2023-11-12 00:52:48,330 INFO L226 Difference]: Without dead ends: 1703 [2023-11-12 00:52:48,337 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 [2023-11-12 00:52:48,339 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1159 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:48,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1657 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-12 00:52:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-12 00:52:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1616. [2023-11-12 00:52:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1143 states have (on average 1.6071741032370954) internal successors, (1837), 1199 states have internal predecessors, (1837), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2023-11-12 00:52:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2628 transitions. [2023-11-12 00:52:48,543 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2628 transitions. Word has length 88 [2023-11-12 00:52:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2628 transitions. [2023-11-12 00:52:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:52:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2628 transitions. [2023-11-12 00:52:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-12 00:52:48,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:48,549 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:52:48,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:48,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 786339665, now seen corresponding path program 1 times [2023-11-12 00:52:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910164216] [2023-11-12 00:52:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:52:49,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:49,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910164216] [2023-11-12 00:52:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910164216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:49,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:49,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:52:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841524954] [2023-11-12 00:52:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:52:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:52:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:52:49,024 INFO L87 Difference]: Start difference. First operand 1616 states and 2628 transitions. Second operand has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-12 00:52:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:52,911 INFO L93 Difference]: Finished difference Result 4091 states and 6633 transitions. [2023-11-12 00:52:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 00:52:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2023-11-12 00:52:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:52,939 INFO L225 Difference]: With dead ends: 4091 [2023-11-12 00:52:52,939 INFO L226 Difference]: Without dead ends: 2491 [2023-11-12 00:52:52,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:52:52,959 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 998 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 4931 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 5226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 4931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:52,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 2828 Invalid, 5226 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [295 Valid, 4931 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-12 00:52:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2023-11-12 00:52:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2408. [2023-11-12 00:52:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 1687 states have (on average 1.5892116182572613) internal successors, (2681), 1765 states have internal predecessors, (2681), 576 states have call successors, (576), 125 states have call predecessors, (576), 144 states have return successors, (621), 550 states have call predecessors, (621), 571 states have call successors, (621) [2023-11-12 00:52:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3878 transitions. [2023-11-12 00:52:53,175 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3878 transitions. Word has length 91 [2023-11-12 00:52:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:53,176 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3878 transitions. [2023-11-12 00:52:53,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.285714285714286) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-12 00:52:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3878 transitions. [2023-11-12 00:52:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 00:52:53,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:53,181 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:53,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:52:53,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:53,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 82456025, now seen corresponding path program 1 times [2023-11-12 00:52:53,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:53,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802857501] [2023-11-12 00:52:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:52:53,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802857501] [2023-11-12 00:52:53,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802857501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:53,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:53,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:53,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823424250] [2023-11-12 00:52:53,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:53,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:52:53,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:52:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:52:53,616 INFO L87 Difference]: Start difference. First operand 2408 states and 3878 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 00:52:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:54,469 INFO L93 Difference]: Finished difference Result 2509 states and 4046 transitions. [2023-11-12 00:52:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2023-11-12 00:52:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:54,498 INFO L225 Difference]: With dead ends: 2509 [2023-11-12 00:52:54,499 INFO L226 Difference]: Without dead ends: 2494 [2023-11-12 00:52:54,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:52:54,507 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 690 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:54,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1841 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:52:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2023-11-12 00:52:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2414. [2023-11-12 00:52:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1693 states have (on average 1.5871234494979327) internal successors, (2687), 1771 states have internal predecessors, (2687), 576 states have call successors, (576), 125 states have call predecessors, (576), 144 states have return successors, (621), 550 states have call predecessors, (621), 571 states have call successors, (621) [2023-11-12 00:52:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3884 transitions. [2023-11-12 00:52:54,759 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3884 transitions. Word has length 92 [2023-11-12 00:52:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:54,760 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3884 transitions. [2023-11-12 00:52:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 00:52:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3884 transitions. [2023-11-12 00:52:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:52:54,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:54,764 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:52:54,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1545960171, now seen corresponding path program 1 times [2023-11-12 00:52:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801182102] [2023-11-12 00:52:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:52:55,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801182102] [2023-11-12 00:52:55,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801182102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:55,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:55,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:52:55,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76491505] [2023-11-12 00:52:55,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:55,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:55,129 INFO L87 Difference]: Start difference. First operand 2414 states and 3884 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:52:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:55,962 INFO L93 Difference]: Finished difference Result 2559 states and 4089 transitions. [2023-11-12 00:52:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:52:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-12 00:52:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:55,985 INFO L225 Difference]: With dead ends: 2559 [2023-11-12 00:52:55,985 INFO L226 Difference]: Without dead ends: 2544 [2023-11-12 00:52:55,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:52:55,989 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 623 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:55,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 2694 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:52:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2023-11-12 00:52:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2490. [2023-11-12 00:52:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1745 states have (on average 1.5787965616045845) internal successors, (2755), 1823 states have internal predecessors, (2755), 592 states have call successors, (592), 133 states have call predecessors, (592), 152 states have return successors, (647), 566 states have call predecessors, (647), 587 states have call successors, (647) [2023-11-12 00:52:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3994 transitions. [2023-11-12 00:52:56,244 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3994 transitions. Word has length 97 [2023-11-12 00:52:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:56,245 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3994 transitions. [2023-11-12 00:52:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:52:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3994 transitions. [2023-11-12 00:52:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-12 00:52:56,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:56,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:52:56,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:56,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -303166623, now seen corresponding path program 1 times [2023-11-12 00:52:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254505848] [2023-11-12 00:52:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:52:56,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:56,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254505848] [2023-11-12 00:52:56,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254505848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:56,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:56,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:56,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977376811] [2023-11-12 00:52:56,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:52:56,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:52:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:52:56,599 INFO L87 Difference]: Start difference. First operand 2490 states and 3994 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:52:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:58,573 INFO L93 Difference]: Finished difference Result 6763 states and 11044 transitions. [2023-11-12 00:52:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2023-11-12 00:52:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:58,612 INFO L225 Difference]: With dead ends: 6763 [2023-11-12 00:52:58,613 INFO L226 Difference]: Without dead ends: 4289 [2023-11-12 00:52:58,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:58,629 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1167 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:58,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 704 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:52:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2023-11-12 00:52:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3926. [2023-11-12 00:52:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 2756 states have (on average 1.5711175616835995) internal successors, (4330), 2886 states have internal predecessors, (4330), 922 states have call successors, (922), 203 states have call predecessors, (922), 247 states have return successors, (1078), 881 states have call predecessors, (1078), 917 states have call successors, (1078) [2023-11-12 00:52:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6330 transitions. [2023-11-12 00:52:59,095 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6330 transitions. Word has length 104 [2023-11-12 00:52:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:59,096 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6330 transitions. [2023-11-12 00:52:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:52:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6330 transitions. [2023-11-12 00:52:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-12 00:52:59,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:59,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:59,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:52:59,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:59,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash -808511679, now seen corresponding path program 1 times [2023-11-12 00:52:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:59,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021082252] [2023-11-12 00:52:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:52:59,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021082252] [2023-11-12 00:52:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021082252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:52:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933374629] [2023-11-12 00:52:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:52:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:52:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:52:59,524 INFO L87 Difference]: Start difference. First operand 3926 states and 6330 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:01,766 INFO L93 Difference]: Finished difference Result 11025 states and 18284 transitions. [2023-11-12 00:53:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2023-11-12 00:53:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:01,874 INFO L225 Difference]: With dead ends: 11025 [2023-11-12 00:53:01,875 INFO L226 Difference]: Without dead ends: 7118 [2023-11-12 00:53:01,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:53:01,905 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1154 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:01,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 717 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:53:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2023-11-12 00:53:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 6647. [2023-11-12 00:53:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6647 states, 4675 states have (on average 1.5670588235294118) internal successors, (7326), 4923 states have internal predecessors, (7326), 1532 states have call successors, (1532), 343 states have call predecessors, (1532), 439 states have return successors, (1994), 1455 states have call predecessors, (1994), 1527 states have call successors, (1994) [2023-11-12 00:53:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6647 states to 6647 states and 10852 transitions. [2023-11-12 00:53:02,808 INFO L78 Accepts]: Start accepts. Automaton has 6647 states and 10852 transitions. Word has length 105 [2023-11-12 00:53:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:02,810 INFO L495 AbstractCegarLoop]: Abstraction has 6647 states and 10852 transitions. [2023-11-12 00:53:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6647 states and 10852 transitions. [2023-11-12 00:53:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-12 00:53:02,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:02,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:02,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:53:02,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:02,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash 705664675, now seen corresponding path program 1 times [2023-11-12 00:53:02,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:02,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495323021] [2023-11-12 00:53:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:53:03,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495323021] [2023-11-12 00:53:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495323021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:03,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:03,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:53:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103288015] [2023-11-12 00:53:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:03,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:03,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:03,115 INFO L87 Difference]: Start difference. First operand 6647 states and 10852 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:05,792 INFO L93 Difference]: Finished difference Result 19370 states and 33133 transitions. [2023-11-12 00:53:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2023-11-12 00:53:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:05,959 INFO L225 Difference]: With dead ends: 19370 [2023-11-12 00:53:05,959 INFO L226 Difference]: Without dead ends: 12748 [2023-11-12 00:53:06,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:53:06,012 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1141 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:06,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 730 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:53:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12748 states. [2023-11-12 00:53:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12748 to 12032. [2023-11-12 00:53:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 8462 states have (on average 1.5613330181990073) internal successors, (13212), 8962 states have internal predecessors, (13212), 2730 states have call successors, (2730), 623 states have call predecessors, (2730), 839 states have return successors, (4188), 2581 states have call predecessors, (4188), 2725 states have call successors, (4188) [2023-11-12 00:53:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 20130 transitions. [2023-11-12 00:53:07,759 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 20130 transitions. Word has length 106 [2023-11-12 00:53:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:07,760 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 20130 transitions. [2023-11-12 00:53:07,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 20130 transitions. [2023-11-12 00:53:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-12 00:53:07,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:07,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:53:07,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:07,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 400495299, now seen corresponding path program 1 times [2023-11-12 00:53:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:07,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029951631] [2023-11-12 00:53:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:53:08,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029951631] [2023-11-12 00:53:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029951631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:08,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:08,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:53:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508309125] [2023-11-12 00:53:08,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:08,071 INFO L87 Difference]: Start difference. First operand 12032 states and 20130 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:11,602 INFO L93 Difference]: Finished difference Result 35899 states and 64844 transitions. [2023-11-12 00:53:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2023-11-12 00:53:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:11,788 INFO L225 Difference]: With dead ends: 35899 [2023-11-12 00:53:11,788 INFO L226 Difference]: Without dead ends: 23904 [2023-11-12 00:53:11,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:53:11,851 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1128 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:11,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 740 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:53:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2023-11-12 00:53:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 22669. [2023-11-12 00:53:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22669 states, 15921 states have (on average 1.5542993530557125) internal successors, (24746), 16957 states have internal predecessors, (24746), 5076 states have call successors, (5076), 1183 states have call predecessors, (5076), 1671 states have return successors, (9822), 4783 states have call predecessors, (9822), 5071 states have call successors, (9822) [2023-11-12 00:53:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22669 states to 22669 states and 39644 transitions. [2023-11-12 00:53:15,092 INFO L78 Accepts]: Start accepts. Automaton has 22669 states and 39644 transitions. Word has length 107 [2023-11-12 00:53:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:15,093 INFO L495 AbstractCegarLoop]: Abstraction has 22669 states and 39644 transitions. [2023-11-12 00:53:15,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:53:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22669 states and 39644 transitions. [2023-11-12 00:53:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 00:53:15,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:15,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:53:15,099 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:15,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:15,099 INFO L85 PathProgramCache]: Analyzing trace with hash -469816859, now seen corresponding path program 1 times [2023-11-12 00:53:15,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:15,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990810927] [2023-11-12 00:53:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:15,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:53:15,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:15,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990810927] [2023-11-12 00:53:15,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990810927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:15,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:15,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:53:15,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510632085] [2023-11-12 00:53:15,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:15,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:15,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:15,376 INFO L87 Difference]: Start difference. First operand 22669 states and 39644 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18)