./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:16,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:16,449 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:22:16,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:16,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:16,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:16,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:16,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:16,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:16,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:16,524 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:16,525 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:16,526 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:16,528 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:16,528 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:16,529 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:16,529 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:16,530 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:16,530 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:16,531 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:16,531 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:16,532 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:16,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:16,534 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:16,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:22:16,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:16,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:22:16,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:16,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:16,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:16,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:16,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:22:16,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:16,540 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:16,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:16,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:16,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:16,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:16,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:16,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:16,542 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:16,543 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:16,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:16,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:16,544 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:16,544 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:16,544 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:16,545 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_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45519c8273c53879cf6a170ed74d5bc0be814b1f3243ce6c30d1d3efe9a3cf32 [2023-11-23 21:22:16,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:16,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:16,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:16,977 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:16,978 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:16,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/systemc/transmitter.16.cil.c [2023-11-23 21:22:20,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:22:20,904 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:22:20,904 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/sv-benchmarks/c/systemc/transmitter.16.cil.c [2023-11-23 21:22:20,931 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/data/3d9daa22a/716384a2e9dd4be985b41e283e5fe6ac/FLAG58fc7f067 [2023-11-23 21:22:20,948 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/data/3d9daa22a/716384a2e9dd4be985b41e283e5fe6ac [2023-11-23 21:22:20,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:22:20,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:22:20,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:20,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:22:20,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:22:20,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:20" (1/1) ... [2023-11-23 21:22:20,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab57d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:20, skipping insertion in model container [2023-11-23 21:22:20,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:20" (1/1) ... [2023-11-23 21:22:21,046 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:22:21,223 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_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2023-11-23 21:22:21,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:21,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:22:21,468 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_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/sv-benchmarks/c/systemc/transmitter.16.cil.c[706,719] [2023-11-23 21:22:21,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:21,580 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:22:21,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21 WrapperNode [2023-11-23 21:22:21,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:21,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:21,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:22:21,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:22:21,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,721 INFO L138 Inliner]: procedures = 56, calls = 71, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 974 [2023-11-23 21:22:21,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:21,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:22:21,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:22:21,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:22:21,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:22:21,876 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:22:21,876 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:22:21,876 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:22:21,877 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (1/1) ... [2023-11-23 21:22:21,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:21,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:22:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6ee04da-1fb3-4f45-a31b-fdc9350a6587/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:22:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:22:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:22:21,980 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:22:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:22:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:22:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:22:21,985 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:22:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:22:21,986 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:22:21,986 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:22:21,986 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:22:21,986 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:22:21,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:22:21,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:22:21,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:22:21,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:22:22,132 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:22:22,135 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:22:23,261 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:22:24,208 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:22:24,209 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-23 21:22:24,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:24 BoogieIcfgContainer [2023-11-23 21:22:24,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:22:24,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:22:24,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:22:24,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:22:24,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:20" (1/3) ... [2023-11-23 21:22:24,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae6b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:24, skipping insertion in model container [2023-11-23 21:22:24,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:21" (2/3) ... [2023-11-23 21:22:24,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dae6b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:24, skipping insertion in model container [2023-11-23 21:22:24,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:24" (3/3) ... [2023-11-23 21:22:24,227 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2023-11-23 21:22:24,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:22:24,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:22:24,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:22:24,349 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;@6ec82945, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:22:24,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:22:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 178 states have internal predecessors, (266), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-23 21:22:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:24,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:24,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:24,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:24,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash 747453786, now seen corresponding path program 1 times [2023-11-23 21:22:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955829444] [2023-11-23 21:22:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:25,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:25,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955829444] [2023-11-23 21:22:25,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955829444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:25,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:25,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265134545] [2023-11-23 21:22:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:25,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:25,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:25,259 INFO L87 Difference]: Start difference. First operand has 210 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 178 states have internal predecessors, (266), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:26,048 INFO L93 Difference]: Finished difference Result 613 states and 958 transitions. [2023-11-23 21:22:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:26,052 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:26,069 INFO L225 Difference]: With dead ends: 613 [2023-11-23 21:22:26,069 INFO L226 Difference]: Without dead ends: 404 [2023-11-23 21:22:26,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:26,081 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 551 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:26,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 898 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:22:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-23 21:22:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2023-11-23 21:22:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 341 states have (on average 1.4721407624633431) internal successors, (502), 342 states have internal predecessors, (502), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:22:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 596 transitions. [2023-11-23 21:22:26,183 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 596 transitions. Word has length 70 [2023-11-23 21:22:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:26,184 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 596 transitions. [2023-11-23 21:22:26,185 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 596 transitions. [2023-11-23 21:22:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:26,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:26,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:26,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:22:26,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:26,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:26,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1159030407, now seen corresponding path program 1 times [2023-11-23 21:22:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:26,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941822981] [2023-11-23 21:22:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:26,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941822981] [2023-11-23 21:22:26,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941822981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:26,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:26,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:26,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688448226] [2023-11-23 21:22:26,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:26,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:26,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:26,569 INFO L87 Difference]: Start difference. First operand 401 states and 596 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:27,495 INFO L93 Difference]: Finished difference Result 1378 states and 2072 transitions. [2023-11-23 21:22:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:27,508 INFO L225 Difference]: With dead ends: 1378 [2023-11-23 21:22:27,508 INFO L226 Difference]: Without dead ends: 955 [2023-11-23 21:22:27,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:27,518 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1185 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:27,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1365 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:22:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-11-23 21:22:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 943. [2023-11-23 21:22:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 822 states have (on average 1.4610705596107056) internal successors, (1201), 811 states have internal predecessors, (1201), 92 states have call successors, (92), 26 states have call predecessors, (92), 28 states have return successors, (106), 106 states have call predecessors, (106), 92 states have call successors, (106) [2023-11-23 21:22:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1399 transitions. [2023-11-23 21:22:27,645 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1399 transitions. Word has length 70 [2023-11-23 21:22:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:27,645 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1399 transitions. [2023-11-23 21:22:27,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1399 transitions. [2023-11-23 21:22:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:27,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:27,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:27,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:22:27,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:27,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1056229160, now seen corresponding path program 1 times [2023-11-23 21:22:27,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:27,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205694815] [2023-11-23 21:22:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:27,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:27,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:27,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205694815] [2023-11-23 21:22:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205694815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:27,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338180112] [2023-11-23 21:22:27,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:27,846 INFO L87 Difference]: Start difference. First operand 943 states and 1399 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:28,656 INFO L93 Difference]: Finished difference Result 3323 states and 4994 transitions. [2023-11-23 21:22:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:28,685 INFO L225 Difference]: With dead ends: 3323 [2023-11-23 21:22:28,685 INFO L226 Difference]: Without dead ends: 2334 [2023-11-23 21:22:28,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:28,697 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:28,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:22:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2023-11-23 21:22:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1806. [2023-11-23 21:22:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1577 states have (on average 1.4654407102092581) internal successors, (2311), 1567 states have internal predecessors, (2311), 172 states have call successors, (172), 50 states have call predecessors, (172), 56 states have return successors, (213), 189 states have call predecessors, (213), 172 states have call successors, (213) [2023-11-23 21:22:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2696 transitions. [2023-11-23 21:22:28,851 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2696 transitions. Word has length 70 [2023-11-23 21:22:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:28,852 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2696 transitions. [2023-11-23 21:22:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2696 transitions. [2023-11-23 21:22:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:28,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:28,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:28,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:22:28,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1137896921, now seen corresponding path program 1 times [2023-11-23 21:22:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365877249] [2023-11-23 21:22:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:29,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:29,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365877249] [2023-11-23 21:22:29,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365877249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:29,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:29,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046975070] [2023-11-23 21:22:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:29,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:29,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:29,097 INFO L87 Difference]: Start difference. First operand 1806 states and 2696 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:29,807 INFO L93 Difference]: Finished difference Result 5379 states and 8167 transitions. [2023-11-23 21:22:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:29,808 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:29,838 INFO L225 Difference]: With dead ends: 5379 [2023-11-23 21:22:29,838 INFO L226 Difference]: Without dead ends: 3578 [2023-11-23 21:22:29,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:29,853 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 566 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:29,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 896 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:22:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3578 states. [2023-11-23 21:22:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3578 to 3566. [2023-11-23 21:22:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3121 states have (on average 1.4578660685677667) internal successors, (4550), 3101 states have internal predecessors, (4550), 332 states have call successors, (332), 100 states have call predecessors, (332), 112 states have return successors, (411), 365 states have call predecessors, (411), 332 states have call successors, (411) [2023-11-23 21:22:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 5293 transitions. [2023-11-23 21:22:30,114 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 5293 transitions. Word has length 70 [2023-11-23 21:22:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 3566 states and 5293 transitions. [2023-11-23 21:22:30,115 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 5293 transitions. [2023-11-23 21:22:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:30,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:30,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:30,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:22:30,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:30,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 264419226, now seen corresponding path program 1 times [2023-11-23 21:22:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005186087] [2023-11-23 21:22:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:30,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:30,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005186087] [2023-11-23 21:22:30,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005186087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:30,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744148974] [2023-11-23 21:22:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:30,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:30,335 INFO L87 Difference]: Start difference. First operand 3566 states and 5293 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:31,622 INFO L93 Difference]: Finished difference Result 12330 states and 18602 transitions. [2023-11-23 21:22:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:31,688 INFO L225 Difference]: With dead ends: 12330 [2023-11-23 21:22:31,689 INFO L226 Difference]: Without dead ends: 8577 [2023-11-23 21:22:31,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:31,709 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:31,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:22:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8577 states. [2023-11-23 21:22:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8577 to 6915. [2023-11-23 21:22:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 6054 states have (on average 1.458374628344896) internal successors, (8829), 6042 states have internal predecessors, (8829), 636 states have call successors, (636), 196 states have call predecessors, (636), 224 states have return successors, (815), 677 states have call predecessors, (815), 636 states have call successors, (815) [2023-11-23 21:22:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 10280 transitions. [2023-11-23 21:22:32,245 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 10280 transitions. Word has length 70 [2023-11-23 21:22:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:32,245 INFO L495 AbstractCegarLoop]: Abstraction has 6915 states and 10280 transitions. [2023-11-23 21:22:32,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 10280 transitions. [2023-11-23 21:22:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:32,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:32,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:32,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:22:32,247 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:32,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -692509157, now seen corresponding path program 1 times [2023-11-23 21:22:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286394370] [2023-11-23 21:22:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:32,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286394370] [2023-11-23 21:22:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286394370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:32,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341074713] [2023-11-23 21:22:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:32,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:32,413 INFO L87 Difference]: Start difference. First operand 6915 states and 10280 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:33,474 INFO L93 Difference]: Finished difference Result 20622 states and 31184 transitions. [2023-11-23 21:22:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:33,475 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:33,598 INFO L225 Difference]: With dead ends: 20622 [2023-11-23 21:22:33,599 INFO L226 Difference]: Without dead ends: 13712 [2023-11-23 21:22:33,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:33,634 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 578 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:33,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 896 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:22:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2023-11-23 21:22:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 13674. [2023-11-23 21:22:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 11989 states have (on average 1.4497456001334557) internal successors, (17381), 11966 states have internal predecessors, (17381), 1236 states have call successors, (1236), 392 states have call predecessors, (1236), 448 states have return successors, (1580), 1316 states have call predecessors, (1580), 1236 states have call successors, (1580) [2023-11-23 21:22:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 20197 transitions. [2023-11-23 21:22:34,565 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 20197 transitions. Word has length 70 [2023-11-23 21:22:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:34,565 INFO L495 AbstractCegarLoop]: Abstraction has 13674 states and 20197 transitions. [2023-11-23 21:22:34,566 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 20197 transitions. [2023-11-23 21:22:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:34,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:34,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:22:34,568 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:34,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2025900380, now seen corresponding path program 1 times [2023-11-23 21:22:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042335491] [2023-11-23 21:22:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:34,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042335491] [2023-11-23 21:22:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042335491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:34,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:34,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:34,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078642814] [2023-11-23 21:22:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:34,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:34,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:34,935 INFO L87 Difference]: Start difference. First operand 13674 states and 20197 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:37,206 INFO L93 Difference]: Finished difference Result 46215 states and 69488 transitions. [2023-11-23 21:22:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:37,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:37,347 INFO L225 Difference]: With dead ends: 46215 [2023-11-23 21:22:37,348 INFO L226 Difference]: Without dead ends: 31818 [2023-11-23 21:22:37,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:37,408 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:37,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:22:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31818 states. [2023-11-23 21:22:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31818 to 26736. [2023-11-23 21:22:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26736 states, 23451 states have (on average 1.4480832373885975) internal successors, (33959), 23460 states have internal predecessors, (33959), 2388 states have call successors, (2388), 776 states have call predecessors, (2388), 896 states have return successors, (3100), 2500 states have call predecessors, (3100), 2388 states have call successors, (3100) [2023-11-23 21:22:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26736 states to 26736 states and 39447 transitions. [2023-11-23 21:22:39,407 INFO L78 Accepts]: Start accepts. Automaton has 26736 states and 39447 transitions. Word has length 70 [2023-11-23 21:22:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:39,408 INFO L495 AbstractCegarLoop]: Abstraction has 26736 states and 39447 transitions. [2023-11-23 21:22:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26736 states and 39447 transitions. [2023-11-23 21:22:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:39,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:39,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:39,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:22:39,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:39,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash 353382749, now seen corresponding path program 1 times [2023-11-23 21:22:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:39,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140347383] [2023-11-23 21:22:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:39,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:39,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:39,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140347383] [2023-11-23 21:22:39,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140347383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:39,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:39,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395189696] [2023-11-23 21:22:39,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:39,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:39,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:39,583 INFO L87 Difference]: Start difference. First operand 26736 states and 39447 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:42,776 INFO L93 Difference]: Finished difference Result 89657 states and 134734 transitions. [2023-11-23 21:22:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:43,273 INFO L225 Difference]: With dead ends: 89657 [2023-11-23 21:22:43,273 INFO L226 Difference]: Without dead ends: 61510 [2023-11-23 21:22:43,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:43,354 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1185 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:43,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1077 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:22:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61510 states. [2023-11-23 21:22:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61510 to 52588. [2023-11-23 21:22:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52588 states, 46167 states have (on average 1.4455996707604999) internal successors, (66739), 46240 states have internal predecessors, (66739), 4628 states have call successors, (4628), 1544 states have call predecessors, (4628), 1792 states have return successors, (6044), 4804 states have call predecessors, (6044), 4628 states have call successors, (6044) [2023-11-23 21:22:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52588 states to 52588 states and 77411 transitions. [2023-11-23 21:22:47,141 INFO L78 Accepts]: Start accepts. Automaton has 52588 states and 77411 transitions. Word has length 70 [2023-11-23 21:22:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:47,142 INFO L495 AbstractCegarLoop]: Abstraction has 52588 states and 77411 transitions. [2023-11-23 21:22:47,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 52588 states and 77411 transitions. [2023-11-23 21:22:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:47,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:47,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:22:47,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:47,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1237012228, now seen corresponding path program 1 times [2023-11-23 21:22:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112399230] [2023-11-23 21:22:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:47,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:47,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112399230] [2023-11-23 21:22:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112399230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:47,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691063254] [2023-11-23 21:22:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:47,351 INFO L87 Difference]: Start difference. First operand 52588 states and 77411 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:52,202 INFO L93 Difference]: Finished difference Result 150335 states and 224067 transitions. [2023-11-23 21:22:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-23 21:22:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:52,699 INFO L225 Difference]: With dead ends: 150335 [2023-11-23 21:22:52,699 INFO L226 Difference]: Without dead ends: 95120 [2023-11-23 21:22:52,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:52,847 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1143 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:52,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 1509 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:22:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95120 states. [2023-11-23 21:22:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95120 to 59556. [2023-11-23 21:22:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59556 states, 52672 states have (on average 1.441942588092345) internal successors, (75950), 52863 states have internal predecessors, (75950), 4827 states have call successors, (4827), 1680 states have call predecessors, (4827), 2056 states have return successors, (6429), 5013 states have call predecessors, (6429), 4827 states have call successors, (6429) [2023-11-23 21:22:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59556 states to 59556 states and 87206 transitions. [2023-11-23 21:22:56,704 INFO L78 Accepts]: Start accepts. Automaton has 59556 states and 87206 transitions. Word has length 70 [2023-11-23 21:22:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:56,705 INFO L495 AbstractCegarLoop]: Abstraction has 59556 states and 87206 transitions. [2023-11-23 21:22:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 59556 states and 87206 transitions. [2023-11-23 21:22:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:22:56,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:56,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:22:56,707 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:56,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -96660517, now seen corresponding path program 1 times [2023-11-23 21:22:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:56,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945061368] [2023-11-23 21:22:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:22:57,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:57,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945061368] [2023-11-23 21:22:57,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945061368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:57,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:57,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:22:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195498130] [2023-11-23 21:22:57,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:57,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:22:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:57,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:22:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:22:57,384 INFO L87 Difference]: Start difference. First operand 59556 states and 87206 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)