./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2d1627f871329627aa5e3c4bb03691b2c1776c373457e4d479d53574c4f3c2af --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:09,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:09,895 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:11:09,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:09,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:09,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:09,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:09,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:09,943 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:09,944 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:09,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:09,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:09,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:09,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:09,947 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:09,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:09,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:11:09,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:09,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:09,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:09,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:09,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:11:09,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:09,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:11:09,954 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:09,955 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:09,955 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:11:09,955 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:09,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:09,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:09,956 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:09,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:09,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:09,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:09,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:09,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:11:09,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:09,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:09,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:09,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:09,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:09,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:09,961 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d1627f871329627aa5e3c4bb03691b2c1776c373457e4d479d53574c4f3c2af [2024-10-31 22:11:10,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:10,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:10,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:10,323 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:10,327 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:10,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/eca-rers2012/Problem16_label17.c Unable to find full path for "g++" [2024-10-31 22:11:12,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:13,103 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:13,108 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/sv-benchmarks/c/eca-rers2012/Problem16_label17.c [2024-10-31 22:11:13,134 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/data/7bf653f7c/a2388ff5a6e2441bb638f7f7b558d4dd/FLAG078352657 [2024-10-31 22:11:13,269 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/data/7bf653f7c/a2388ff5a6e2441bb638f7f7b558d4dd [2024-10-31 22:11:13,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:13,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:13,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:13,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:13,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:13,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:13" (1/1) ... [2024-10-31 22:11:13,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2340a68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:13, skipping insertion in model container [2024-10-31 22:11:13,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:13" (1/1) ... [2024-10-31 22:11:13,380 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:13,757 WARN L251 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_1fb70f5f-fac7-4467-b059-749423f5eedd/sv-benchmarks/c/eca-rers2012/Problem16_label17.c[6102,6115] [2024-10-31 22:11:14,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:14,397 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:14,448 WARN L251 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_1fb70f5f-fac7-4467-b059-749423f5eedd/sv-benchmarks/c/eca-rers2012/Problem16_label17.c[6102,6115] [2024-10-31 22:11:14,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:14,946 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:14,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14 WrapperNode [2024-10-31 22:11:14,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:14,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:14,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:14,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:14,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,174 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1770 [2024-10-31 22:11:15,175 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:15,175 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:15,175 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:15,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:15,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,271 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:11:15,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:15,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:15,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:15,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:15,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (1/1) ... [2024-10-31 22:11:15,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:15,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:15,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:15,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fb70f5f-fac7-4467-b059-749423f5eedd/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:15,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:15,733 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:15,735 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:18,368 INFO L? ?]: Removed 276 outVars from TransFormulas that were not future-live. [2024-10-31 22:11:18,369 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:18,396 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:18,399 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:11:18,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:18 BoogieIcfgContainer [2024-10-31 22:11:18,400 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:18,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:18,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:18,406 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:18,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:13" (1/3) ... [2024-10-31 22:11:18,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19eaebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:18, skipping insertion in model container [2024-10-31 22:11:18,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:14" (2/3) ... [2024-10-31 22:11:18,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19eaebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:18, skipping insertion in model container [2024-10-31 22:11:18,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:18" (3/3) ... [2024-10-31 22:11:18,410 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2024-10-31 22:11:18,429 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:18,429 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:11:18,512 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:18,523 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, 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;@37da9917, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:18,523 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:11:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-31 22:11:18,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:18,541 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:18,541 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:18,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2024-10-31 22:11:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733776624] [2024-10-31 22:11:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:19,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733776624] [2024-10-31 22:11:19,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733776624] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:19,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305662842] [2024-10-31 22:11:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:19,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:19,146 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:21,885 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2024-10-31 22:11:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-10-31 22:11:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:21,929 INFO L225 Difference]: With dead ends: 1137 [2024-10-31 22:11:21,929 INFO L226 Difference]: Without dead ends: 662 [2024-10-31 22:11:21,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:21,938 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 326 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:21,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-31 22:11:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2024-10-31 22:11:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2024-10-31 22:11:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2024-10-31 22:11:22,029 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 58 [2024-10-31 22:11:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:22,030 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2024-10-31 22:11:22,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2024-10-31 22:11:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 22:11:22,034 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:22,035 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:22,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:22,035 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:22,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1155989113, now seen corresponding path program 1 times [2024-10-31 22:11:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358660809] [2024-10-31 22:11:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:22,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:22,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:22,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358660809] [2024-10-31 22:11:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358660809] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:22,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:22,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442752298] [2024-10-31 22:11:22,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:22,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:22,309 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:24,324 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2024-10-31 22:11:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:24,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-10-31 22:11:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:24,331 INFO L225 Difference]: With dead ends: 1980 [2024-10-31 22:11:24,331 INFO L226 Difference]: Without dead ends: 1320 [2024-10-31 22:11:24,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:24,334 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:24,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-31 22:11:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-10-31 22:11:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2024-10-31 22:11:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2024-10-31 22:11:24,403 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 124 [2024-10-31 22:11:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:24,403 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2024-10-31 22:11:24,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2024-10-31 22:11:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-31 22:11:24,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:24,408 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:24,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:11:24,408 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:24,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2093959461, now seen corresponding path program 1 times [2024-10-31 22:11:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:24,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049647819] [2024-10-31 22:11:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049647819] [2024-10-31 22:11:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049647819] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:24,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343854904] [2024-10-31 22:11:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:24,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:24,639 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:26,608 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2024-10-31 22:11:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2024-10-31 22:11:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:26,618 INFO L225 Difference]: With dead ends: 3296 [2024-10-31 22:11:26,618 INFO L226 Difference]: Without dead ends: 1978 [2024-10-31 22:11:26,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:26,622 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:26,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-31 22:11:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2024-10-31 22:11:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2024-10-31 22:11:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2024-10-31 22:11:26,676 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 125 [2024-10-31 22:11:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:26,678 INFO L471 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2024-10-31 22:11:26,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2024-10-31 22:11:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-10-31 22:11:26,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:26,687 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:26,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:11:26,688 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:26,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1148780661, now seen corresponding path program 1 times [2024-10-31 22:11:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:26,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613584344] [2024-10-31 22:11:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:27,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613584344] [2024-10-31 22:11:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613584344] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:27,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:27,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719079704] [2024-10-31 22:11:27,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:27,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:27,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:27,151 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:29,469 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2024-10-31 22:11:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2024-10-31 22:11:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:29,484 INFO L225 Difference]: With dead ends: 5928 [2024-10-31 22:11:29,484 INFO L226 Difference]: Without dead ends: 3952 [2024-10-31 22:11:29,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:29,488 INFO L432 NwaCegarLoop]: 254 mSDtfsCounter, 181 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:29,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 259 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-31 22:11:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2024-10-31 22:11:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2024-10-31 22:11:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.216400911161731) internal successors, (4806), 3951 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4806 transitions. [2024-10-31 22:11:29,573 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4806 transitions. Word has length 217 [2024-10-31 22:11:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:29,574 INFO L471 AbstractCegarLoop]: Abstraction has 3952 states and 4806 transitions. [2024-10-31 22:11:29,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4806 transitions. [2024-10-31 22:11:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2024-10-31 22:11:29,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:29,581 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:29,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:29,581 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:29,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1357137442, now seen corresponding path program 1 times [2024-10-31 22:11:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:29,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13914398] [2024-10-31 22:11:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:30,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13914398] [2024-10-31 22:11:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13914398] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:30,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974356885] [2024-10-31 22:11:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:30,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:30,621 INFO L87 Difference]: Start difference. First operand 3952 states and 4806 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:33,044 INFO L93 Difference]: Finished difference Result 8231 states and 9951 transitions. [2024-10-31 22:11:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2024-10-31 22:11:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:33,060 INFO L225 Difference]: With dead ends: 8231 [2024-10-31 22:11:33,061 INFO L226 Difference]: Without dead ends: 4281 [2024-10-31 22:11:33,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:33,066 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 127 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:33,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 322 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-31 22:11:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2024-10-31 22:11:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2024-10-31 22:11:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.2011682242990653) internal successors, (5141), 4280 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5141 transitions. [2024-10-31 22:11:33,158 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5141 transitions. Word has length 303 [2024-10-31 22:11:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:33,159 INFO L471 AbstractCegarLoop]: Abstraction has 4281 states and 5141 transitions. [2024-10-31 22:11:33,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5141 transitions. [2024-10-31 22:11:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2024-10-31 22:11:33,168 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:33,169 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:33,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:11:33,169 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:33,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 291858287, now seen corresponding path program 1 times [2024-10-31 22:11:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871510289] [2024-10-31 22:11:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:34,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:34,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871510289] [2024-10-31 22:11:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871510289] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:34,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:34,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:11:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775785587] [2024-10-31 22:11:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:34,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:11:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:11:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:34,196 INFO L87 Difference]: Start difference. First operand 4281 states and 5141 transitions. Second operand has 7 states, 7 states have (on average 55.714285714285715) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:37,198 INFO L93 Difference]: Finished difference Result 8090 states and 9792 transitions. [2024-10-31 22:11:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:11:37,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 55.714285714285715) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2024-10-31 22:11:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:37,213 INFO L225 Difference]: With dead ends: 8090 [2024-10-31 22:11:37,213 INFO L226 Difference]: Without dead ends: 3952 [2024-10-31 22:11:37,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:11:37,229 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 288 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:37,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 302 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-10-31 22:11:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2024-10-31 22:11:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2024-10-31 22:11:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.0802328524424196) internal successors, (4268), 3951 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4268 transitions. [2024-10-31 22:11:37,363 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4268 transitions. Word has length 390 [2024-10-31 22:11:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:37,364 INFO L471 AbstractCegarLoop]: Abstraction has 3952 states and 4268 transitions. [2024-10-31 22:11:37,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.714285714285715) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4268 transitions. [2024-10-31 22:11:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2024-10-31 22:11:37,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:37,373 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:37,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:11:37,373 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:37,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1805853929, now seen corresponding path program 1 times [2024-10-31 22:11:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642109321] [2024-10-31 22:11:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-31 22:11:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:37,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642109321] [2024-10-31 22:11:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642109321] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:37,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280146721] [2024-10-31 22:11:37,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:37,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:37,908 INFO L87 Difference]: Start difference. First operand 3952 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:39,150 INFO L93 Difference]: Finished difference Result 9547 states and 10414 transitions. [2024-10-31 22:11:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 397 [2024-10-31 22:11:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:39,169 INFO L225 Difference]: With dead ends: 9547 [2024-10-31 22:11:39,169 INFO L226 Difference]: Without dead ends: 5926 [2024-10-31 22:11:39,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:39,175 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 291 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:39,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 40 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 22:11:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2024-10-31 22:11:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2024-10-31 22:11:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0828691983122363) internal successors, (6416), 5925 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6416 transitions. [2024-10-31 22:11:39,281 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6416 transitions. Word has length 397 [2024-10-31 22:11:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:39,282 INFO L471 AbstractCegarLoop]: Abstraction has 5926 states and 6416 transitions. [2024-10-31 22:11:39,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6416 transitions. [2024-10-31 22:11:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2024-10-31 22:11:39,294 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:39,294 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:39,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:11:39,295 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:11:39,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -290785699, now seen corresponding path program 1 times [2024-10-31 22:11:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717823231] [2024-10-31 22:11:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-31 22:11:39,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717823231] [2024-10-31 22:11:39,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717823231] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:39,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:39,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:39,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8535068] [2024-10-31 22:11:39,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:39,992 INFO L87 Difference]: Start difference. First operand 5926 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)