./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:18:11,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:18:11,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:18:11,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:18:11,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:18:11,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:18:11,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:18:11,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:18:11,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:18:11,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:18:11,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:18:11,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:18:11,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:18:11,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:18:11,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:18:11,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:18:11,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:18:11,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:18:11,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:18:11,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:18:11,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:18:11,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:18:11,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:18:11,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:18:11,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:18:11,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:18:11,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:18:11,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:18:11,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:18:11,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:18:11,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:18:11,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:18:11,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:18:11,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:18:11,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:18:11,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:18:11,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:18:11,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:18:11,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:18:11,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:18:11,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:18:11,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:18:11,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:18:11,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:18:11,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:18:11,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:18:11,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:18:11,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:18:11,968 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:18:11,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:18:11,968 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:18:11,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:18:11,970 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:18:11,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:18:11,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:18:11,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:18:11,970 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:18:11,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:18:11,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:18:11,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:18:11,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:18:11,972 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:18:11,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:18:11,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:18:11,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:18:11,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:18:11,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:18:11,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:18:11,975 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:18:11,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:18:11,975 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:18:11,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:18:11,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:18:11,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:18:11,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:18:11,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:18:11,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:18:11,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:18:11,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:18:11,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:18:11,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:18:11,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:18:11,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:18:11,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 [2022-11-19 08:18:12,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:18:12,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:18:12,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:18:12,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:18:12,240 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:18:12,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-11-19 08:18:12,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/data/b52eec27f/6824b37ac0bf4a3b890a6cfc998b25f4/FLAG4eb9b853c [2022-11-19 08:18:12,991 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:18:12,992 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-11-19 08:18:13,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/data/b52eec27f/6824b37ac0bf4a3b890a6cfc998b25f4/FLAG4eb9b853c [2022-11-19 08:18:13,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/data/b52eec27f/6824b37ac0bf4a3b890a6cfc998b25f4 [2022-11-19 08:18:13,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:18:13,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:18:13,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:18:13,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:18:13,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:18:13,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:18:13" (1/1) ... [2022-11-19 08:18:13,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48999e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:13, skipping insertion in model container [2022-11-19 08:18:13,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:18:13" (1/1) ... [2022-11-19 08:18:13,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:18:13,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:18:13,668 WARN L234 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_6e7a97a1-e5a8-4780-a444-721522e57487/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-11-19 08:18:13,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:18:13,912 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:18:13,984 WARN L234 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_6e7a97a1-e5a8-4780-a444-721522e57487/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-11-19 08:18:14,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:18:14,098 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:18:14,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14 WrapperNode [2022-11-19 08:18:14,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:18:14,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:18:14,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:18:14,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:18:14,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,189 INFO L138 Inliner]: procedures = 89, calls = 330, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 812 [2022-11-19 08:18:14,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:18:14,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:18:14,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:18:14,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:18:14,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,282 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:18:14,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:18:14,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:18:14,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:18:14,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (1/1) ... [2022-11-19 08:18:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:18:14,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:14,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:18:14,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:18:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:18:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 08:18:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 08:18:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 08:18:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 08:18:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 08:18:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 08:18:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 08:18:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 08:18:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:18:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:18:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:18:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:18:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 08:18:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 08:18:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 08:18:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 08:18:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 08:18:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 08:18:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 08:18:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 08:18:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 08:18:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 08:18:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 08:18:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 08:18:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 08:18:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 08:18:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 08:18:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 08:18:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 08:18:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 08:18:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 08:18:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 08:18:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:18:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 08:18:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 08:18:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 08:18:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 08:18:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 08:18:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 08:18:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:18:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:18:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 08:18:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 08:18:14,543 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:18:14,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:18:15,970 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:18:16,728 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:18:16,728 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:18:16,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:18:16 BoogieIcfgContainer [2022-11-19 08:18:16,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:18:16,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:18:16,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:18:16,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:18:16,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:18:13" (1/3) ... [2022-11-19 08:18:16,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d44a653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:18:16, skipping insertion in model container [2022-11-19 08:18:16,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:18:14" (2/3) ... [2022-11-19 08:18:16,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d44a653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:18:16, skipping insertion in model container [2022-11-19 08:18:16,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:18:16" (3/3) ... [2022-11-19 08:18:16,744 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2022-11-19 08:18:16,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:18:16,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:18:16,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:18:16,867 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=LoopsAndPotentialCycles, 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;@63ecfdf4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:18:16,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:18:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-19 08:18:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 08:18:16,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:16,901 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] [2022-11-19 08:18:16,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1896799847, now seen corresponding path program 1 times [2022-11-19 08:18:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965541957] [2022-11-19 08:18:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:16,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:17,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:17,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965541957] [2022-11-19 08:18:17,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965541957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:17,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:17,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:18:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449881059] [2022-11-19 08:18:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:17,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:18:17,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:18:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:18:17,438 INFO L87 Difference]: Start difference. First operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 08:18:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:17,656 INFO L93 Difference]: Finished difference Result 359 states and 579 transitions. [2022-11-19 08:18:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:18:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-11-19 08:18:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:17,677 INFO L225 Difference]: With dead ends: 359 [2022-11-19 08:18:17,677 INFO L226 Difference]: Without dead ends: 337 [2022-11-19 08:18:17,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:18:17,685 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:17,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 513 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:18:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-19 08:18:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-11-19 08:18:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 231 states have (on average 1.619047619047619) internal successors, (374), 250 states have internal predecessors, (374), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-19 08:18:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2022-11-19 08:18:17,772 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 51 [2022-11-19 08:18:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:17,774 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2022-11-19 08:18:17,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 08:18:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2022-11-19 08:18:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:18:17,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:17,780 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] [2022-11-19 08:18:17,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:18:17,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2062405011, now seen corresponding path program 1 times [2022-11-19 08:18:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118921257] [2022-11-19 08:18:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:18,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:18,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118921257] [2022-11-19 08:18:18,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118921257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:18,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:18,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:18:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854497976] [2022-11-19 08:18:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:18:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:18:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:18,305 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:18:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:20,923 INFO L93 Difference]: Finished difference Result 1142 states and 1868 transitions. [2022-11-19 08:18:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:18:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-19 08:18:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:20,937 INFO L225 Difference]: With dead ends: 1142 [2022-11-19 08:18:20,937 INFO L226 Difference]: Without dead ends: 821 [2022-11-19 08:18:20,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:18:20,951 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1614 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:20,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1675 Valid, 1657 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 08:18:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-19 08:18:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 772. [2022-11-19 08:18:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 549 states have (on average 1.6466302367941712) internal successors, (904), 584 states have internal predecessors, (904), 181 states have call successors, (181), 39 states have call predecessors, (181), 41 states have return successors, (182), 173 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-19 08:18:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1267 transitions. [2022-11-19 08:18:21,093 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1267 transitions. Word has length 52 [2022-11-19 08:18:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:21,095 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1267 transitions. [2022-11-19 08:18:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:18:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1267 transitions. [2022-11-19 08:18:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:18:21,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:21,100 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] [2022-11-19 08:18:21,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:18:21,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1178978120, now seen corresponding path program 1 times [2022-11-19 08:18:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:21,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432947547] [2022-11-19 08:18:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:21,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:21,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432947547] [2022-11-19 08:18:21,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432947547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:21,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:21,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:18:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167800325] [2022-11-19 08:18:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:18:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:18:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:21,410 INFO L87 Difference]: Start difference. First operand 772 states and 1267 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:18:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:21,633 INFO L93 Difference]: Finished difference Result 1302 states and 2142 transitions. [2022-11-19 08:18:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-11-19 08:18:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:21,640 INFO L225 Difference]: With dead ends: 1302 [2022-11-19 08:18:21,640 INFO L226 Difference]: Without dead ends: 842 [2022-11-19 08:18:21,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:21,643 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 41 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:21,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2141 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:18:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-19 08:18:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 784. [2022-11-19 08:18:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 181 states have call successors, (181), 39 states have call predecessors, (181), 44 states have return successors, (188), 176 states have call predecessors, (188), 176 states have call successors, (188) [2022-11-19 08:18:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1282 transitions. [2022-11-19 08:18:21,711 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1282 transitions. Word has length 56 [2022-11-19 08:18:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:21,712 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1282 transitions. [2022-11-19 08:18:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:18:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1282 transitions. [2022-11-19 08:18:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:18:21,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:21,715 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] [2022-11-19 08:18:21,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:18:21,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2120203216, now seen corresponding path program 1 times [2022-11-19 08:18:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291570689] [2022-11-19 08:18:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:22,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291570689] [2022-11-19 08:18:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291570689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:22,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:22,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:18:22,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19492712] [2022-11-19 08:18:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:22,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:18:22,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:22,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:18:22,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:18:22,036 INFO L87 Difference]: Start difference. First operand 784 states and 1282 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 08:18:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:24,759 INFO L93 Difference]: Finished difference Result 1791 states and 2921 transitions. [2022-11-19 08:18:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:18:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-11-19 08:18:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:24,767 INFO L225 Difference]: With dead ends: 1791 [2022-11-19 08:18:24,768 INFO L226 Difference]: Without dead ends: 1223 [2022-11-19 08:18:24,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:18:24,772 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 3042 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 1316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1316 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:24,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3185 Valid, 1120 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1316 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 08:18:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-19 08:18:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1129. [2022-11-19 08:18:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5903919089759797) internal successors, (1258), 843 states have internal predecessors, (1258), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-19 08:18:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1808 transitions. [2022-11-19 08:18:24,863 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1808 transitions. Word has length 60 [2022-11-19 08:18:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:24,864 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1808 transitions. [2022-11-19 08:18:24,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 08:18:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1808 transitions. [2022-11-19 08:18:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:18:24,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:24,867 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] [2022-11-19 08:18:24,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:18:24,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1068971566, now seen corresponding path program 1 times [2022-11-19 08:18:24,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273037237] [2022-11-19 08:18:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:24,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:25,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273037237] [2022-11-19 08:18:25,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273037237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:25,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:25,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684984358] [2022-11-19 08:18:25,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:25,062 INFO L87 Difference]: Start difference. First operand 1129 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:25,348 INFO L93 Difference]: Finished difference Result 2186 states and 3555 transitions. [2022-11-19 08:18:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:18:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-11-19 08:18:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:25,356 INFO L225 Difference]: With dead ends: 2186 [2022-11-19 08:18:25,357 INFO L226 Difference]: Without dead ends: 1129 [2022-11-19 08:18:25,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:25,363 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 210 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:25,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1380 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:18:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-19 08:18:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2022-11-19 08:18:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5499367888748419) internal successors, (1226), 843 states have internal predecessors, (1226), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-19 08:18:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1776 transitions. [2022-11-19 08:18:25,451 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1776 transitions. Word has length 63 [2022-11-19 08:18:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:25,451 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1776 transitions. [2022-11-19 08:18:25,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:18:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1776 transitions. [2022-11-19 08:18:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 08:18:25,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:25,454 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:25,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:18:25,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:25,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1510403678, now seen corresponding path program 1 times [2022-11-19 08:18:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:25,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003005367] [2022-11-19 08:18:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:25,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:18:25,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003005367] [2022-11-19 08:18:25,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003005367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:25,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:25,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:18:25,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783198921] [2022-11-19 08:18:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:25,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:18:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:18:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:25,742 INFO L87 Difference]: Start difference. First operand 1129 states and 1776 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:27,769 INFO L93 Difference]: Finished difference Result 2173 states and 3433 transitions. [2022-11-19 08:18:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:18:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-11-19 08:18:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:27,785 INFO L225 Difference]: With dead ends: 2173 [2022-11-19 08:18:27,785 INFO L226 Difference]: Without dead ends: 1317 [2022-11-19 08:18:27,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:18:27,792 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 905 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:27,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1512 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:18:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-11-19 08:18:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2022-11-19 08:18:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 809 states have (on average 1.542645241038319) internal successors, (1248), 865 states have internal predecessors, (1248), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-19 08:18:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1810 transitions. [2022-11-19 08:18:27,877 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1810 transitions. Word has length 65 [2022-11-19 08:18:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:27,879 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1810 transitions. [2022-11-19 08:18:27,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:18:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1810 transitions. [2022-11-19 08:18:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 08:18:27,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:27,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:27,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:18:27,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1979741027, now seen corresponding path program 1 times [2022-11-19 08:18:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505206667] [2022-11-19 08:18:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:18:28,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505206667] [2022-11-19 08:18:28,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505206667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:28,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:28,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:18:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172148990] [2022-11-19 08:18:28,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:18:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:18:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:28,175 INFO L87 Difference]: Start difference. First operand 1156 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:18:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:28,786 INFO L93 Difference]: Finished difference Result 1228 states and 1923 transitions. [2022-11-19 08:18:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-19 08:18:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:28,795 INFO L225 Difference]: With dead ends: 1228 [2022-11-19 08:18:28,796 INFO L226 Difference]: Without dead ends: 1213 [2022-11-19 08:18:28,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:18:28,798 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 596 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:28,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1656 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:18:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-19 08:18:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-11-19 08:18:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5399753997539976) internal successors, (1252), 869 states have internal predecessors, (1252), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-19 08:18:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1814 transitions. [2022-11-19 08:18:28,886 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1814 transitions. Word has length 72 [2022-11-19 08:18:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:28,887 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1814 transitions. [2022-11-19 08:18:28,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:18:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1814 transitions. [2022-11-19 08:18:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 08:18:28,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:28,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:18:28,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1176071550, now seen corresponding path program 1 times [2022-11-19 08:18:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:28,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562769363] [2022-11-19 08:18:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:28,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:18:29,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562769363] [2022-11-19 08:18:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562769363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:18:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481617551] [2022-11-19 08:18:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:18:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:18:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:29,112 INFO L87 Difference]: Start difference. First operand 1160 states and 1814 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-19 08:18:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:29,320 INFO L93 Difference]: Finished difference Result 1179 states and 1838 transitions. [2022-11-19 08:18:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:18:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-19 08:18:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:29,331 INFO L225 Difference]: With dead ends: 1179 [2022-11-19 08:18:29,331 INFO L226 Difference]: Without dead ends: 1164 [2022-11-19 08:18:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:29,335 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 30 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:29,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1970 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:18:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-19 08:18:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1160. [2022-11-19 08:18:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5362853628536286) internal successors, (1249), 869 states have internal predecessors, (1249), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-19 08:18:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1811 transitions. [2022-11-19 08:18:29,420 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1811 transitions. Word has length 77 [2022-11-19 08:18:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:29,421 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1811 transitions. [2022-11-19 08:18:29,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-19 08:18:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1811 transitions. [2022-11-19 08:18:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:18:29,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:29,429 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:29,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:18:29,429 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash 818600832, now seen corresponding path program 1 times [2022-11-19 08:18:29,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:29,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008753050] [2022-11-19 08:18:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:29,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:18:29,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008753050] [2022-11-19 08:18:29,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008753050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:29,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:29,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:29,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065587759] [2022-11-19 08:18:29,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:29,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:29,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:29,677 INFO L87 Difference]: Start difference. First operand 1160 states and 1811 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:31,337 INFO L93 Difference]: Finished difference Result 3735 states and 5935 transitions. [2022-11-19 08:18:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-11-19 08:18:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:31,361 INFO L225 Difference]: With dead ends: 3735 [2022-11-19 08:18:31,361 INFO L226 Difference]: Without dead ends: 2591 [2022-11-19 08:18:31,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:31,371 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1067 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:31,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 674 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:18:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-11-19 08:18:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2344. [2022-11-19 08:18:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1673 states have (on average 1.5457262402869096) internal successors, (2586), 1784 states have internal predecessors, (2586), 517 states have call successors, (517), 123 states have call predecessors, (517), 153 states have return successors, (594), 489 states have call predecessors, (594), 512 states have call successors, (594) [2022-11-19 08:18:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3697 transitions. [2022-11-19 08:18:31,588 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3697 transitions. Word has length 81 [2022-11-19 08:18:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:31,590 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3697 transitions. [2022-11-19 08:18:31,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3697 transitions. [2022-11-19 08:18:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 08:18:31,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:31,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:18:31,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1377462244, now seen corresponding path program 1 times [2022-11-19 08:18:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267702453] [2022-11-19 08:18:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:31,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:18:31,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:31,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267702453] [2022-11-19 08:18:31,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267702453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:31,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:31,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:31,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498806349] [2022-11-19 08:18:31,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:31,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:31,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:31,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:31,854 INFO L87 Difference]: Start difference. First operand 2344 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:18:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:33,676 INFO L93 Difference]: Finished difference Result 7195 states and 11541 transitions. [2022-11-19 08:18:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:33,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-11-19 08:18:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:33,716 INFO L225 Difference]: With dead ends: 7195 [2022-11-19 08:18:33,716 INFO L226 Difference]: Without dead ends: 4870 [2022-11-19 08:18:33,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:33,733 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1048 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:33,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 682 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:18:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-11-19 08:18:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4554. [2022-11-19 08:18:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3280 states have (on average 1.5484756097560977) internal successors, (5079), 3513 states have internal predecessors, (5079), 964 states have call successors, (964), 235 states have call predecessors, (964), 309 states have return successors, (1190), 896 states have call predecessors, (1190), 959 states have call successors, (1190) [2022-11-19 08:18:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7233 transitions. [2022-11-19 08:18:34,206 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7233 transitions. Word has length 85 [2022-11-19 08:18:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:34,207 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 7233 transitions. [2022-11-19 08:18:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:18:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7233 transitions. [2022-11-19 08:18:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 08:18:34,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:34,210 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:34,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:18:34,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash 683058498, now seen corresponding path program 1 times [2022-11-19 08:18:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:34,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895670215] [2022-11-19 08:18:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:18:34,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:34,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895670215] [2022-11-19 08:18:34,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895670215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:34,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:34,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373779752] [2022-11-19 08:18:34,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:34,526 INFO L87 Difference]: Start difference. First operand 4554 states and 7233 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:36,834 INFO L93 Difference]: Finished difference Result 13885 states and 22609 transitions. [2022-11-19 08:18:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-11-19 08:18:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:36,922 INFO L225 Difference]: With dead ends: 13885 [2022-11-19 08:18:36,923 INFO L226 Difference]: Without dead ends: 9356 [2022-11-19 08:18:36,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:36,952 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1041 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:36,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 691 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:18:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2022-11-19 08:18:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8888. [2022-11-19 08:18:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 6423 states have (on average 1.5453837770512222) internal successors, (9926), 6912 states have internal predecessors, (9926), 1831 states have call successors, (1831), 459 states have call predecessors, (1831), 633 states have return successors, (2517), 1683 states have call predecessors, (2517), 1826 states have call successors, (2517) [2022-11-19 08:18:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 14274 transitions. [2022-11-19 08:18:38,039 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 14274 transitions. Word has length 83 [2022-11-19 08:18:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:38,040 INFO L495 AbstractCegarLoop]: Abstraction has 8888 states and 14274 transitions. [2022-11-19 08:18:38,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 14274 transitions. [2022-11-19 08:18:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 08:18:38,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:38,046 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:18:38,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -300431786, now seen corresponding path program 1 times [2022-11-19 08:18:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800403166] [2022-11-19 08:18:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:18:38,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800403166] [2022-11-19 08:18:38,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800403166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:38,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:38,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:38,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497953948] [2022-11-19 08:18:38,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:38,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:38,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:38,325 INFO L87 Difference]: Start difference. First operand 8888 states and 14274 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:41,347 INFO L93 Difference]: Finished difference Result 27035 states and 45273 transitions. [2022-11-19 08:18:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-11-19 08:18:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:41,477 INFO L225 Difference]: With dead ends: 27035 [2022-11-19 08:18:41,478 INFO L226 Difference]: Without dead ends: 18184 [2022-11-19 08:18:41,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:41,527 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1028 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:41,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 703 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:18:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2022-11-19 08:18:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17398. [2022-11-19 08:18:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 12578 states have (on average 1.539274924471299) internal successors, (19361), 13603 states have internal predecessors, (19361), 3514 states have call successors, (3514), 907 states have call predecessors, (3514), 1305 states have return successors, (5684), 3206 states have call predecessors, (5684), 3509 states have call successors, (5684) [2022-11-19 08:18:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 28559 transitions. [2022-11-19 08:18:43,798 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 28559 transitions. Word has length 84 [2022-11-19 08:18:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:43,799 INFO L495 AbstractCegarLoop]: Abstraction has 17398 states and 28559 transitions. [2022-11-19 08:18:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 08:18:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 28559 transitions. [2022-11-19 08:18:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:18:43,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:43,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:18:43,815 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2025169724, now seen corresponding path program 1 times [2022-11-19 08:18:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123231022] [2022-11-19 08:18:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:18:44,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123231022] [2022-11-19 08:18:44,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123231022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:44,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:18:44,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:18:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834764896] [2022-11-19 08:18:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:18:44,015 INFO L87 Difference]: Start difference. First operand 17398 states and 28559 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:18:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:48,584 INFO L93 Difference]: Finished difference Result 53027 states and 93549 transitions. [2022-11-19 08:18:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2022-11-19 08:18:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:48,842 INFO L225 Difference]: With dead ends: 53027 [2022-11-19 08:18:48,842 INFO L226 Difference]: Without dead ends: 35680 [2022-11-19 08:18:48,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:18:48,919 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1013 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:48,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 717 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:18:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35680 states. [2022-11-19 08:18:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35680 to 34044. [2022-11-19 08:18:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 24665 states have (on average 1.5361037907966755) internal successors, (37888), 26717 states have internal predecessors, (37888), 6778 states have call successors, (6778), 1800 states have call predecessors, (6778), 2600 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-19 08:18:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 57973 transitions. [2022-11-19 08:18:52,946 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 57973 transitions. Word has length 88 [2022-11-19 08:18:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:52,947 INFO L495 AbstractCegarLoop]: Abstraction has 34044 states and 57973 transitions. [2022-11-19 08:18:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 08:18:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 57973 transitions. [2022-11-19 08:18:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:18:52,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:52,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:18:52,957 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:18:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1607059054, now seen corresponding path program 1 times [2022-11-19 08:18:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:18:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731089951] [2022-11-19 08:18:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:18:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-19 08:18:53,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:18:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731089951] [2022-11-19 08:18:53,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731089951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:18:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070651506] [2022-11-19 08:18:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:53,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:53,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:53,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:18:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:18:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:18:53,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:18:53,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070651506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:18:53,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:18:53,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 08:18:53,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195067882] [2022-11-19 08:18:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:18:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:18:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:18:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:18:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:18:53,754 INFO L87 Difference]: Start difference. First operand 34044 states and 57973 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 08:18:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:57,166 INFO L93 Difference]: Finished difference Result 71815 states and 127334 transitions. [2022-11-19 08:18:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:18:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2022-11-19 08:18:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:57,419 INFO L225 Difference]: With dead ends: 71815 [2022-11-19 08:18:57,420 INFO L226 Difference]: Without dead ends: 37788 [2022-11-19 08:18:57,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:18:57,573 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 213 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:57,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1275 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:18:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37788 states. [2022-11-19 08:19:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37788 to 37788. [2022-11-19 08:19:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37788 states, 28313 states have (on average 1.5857026807473598) internal successors, (44896), 30365 states have internal predecessors, (44896), 6778 states have call successors, (6778), 1896 states have call predecessors, (6778), 2696 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-19 08:19:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37788 states to 37788 states and 64981 transitions. [2022-11-19 08:19:01,218 INFO L78 Accepts]: Start accepts. Automaton has 37788 states and 64981 transitions. Word has length 127 [2022-11-19 08:19:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:01,219 INFO L495 AbstractCegarLoop]: Abstraction has 37788 states and 64981 transitions. [2022-11-19 08:19:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 08:19:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37788 states and 64981 transitions. [2022-11-19 08:19:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-19 08:19:01,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:01,233 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:01,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:01,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:01,444 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2086756243, now seen corresponding path program 1 times [2022-11-19 08:19:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:01,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412899323] [2022-11-19 08:19:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:01,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:19:03,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:03,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412899323] [2022-11-19 08:19:03,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412899323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821886206] [2022-11-19 08:19:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:03,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:03,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:03,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:03,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:19:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:19:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:19:03,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:19:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821886206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:03,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:19:03,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-19 08:19:03,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466861482] [2022-11-19 08:19:03,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:03,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:19:03,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:19:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:19:03,842 INFO L87 Difference]: Start difference. First operand 37788 states and 64981 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 08:19:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:06,785 INFO L93 Difference]: Finished difference Result 79303 states and 141251 transitions. [2022-11-19 08:19:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:19:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2022-11-19 08:19:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:06,975 INFO L225 Difference]: With dead ends: 79303 [2022-11-19 08:19:06,975 INFO L226 Difference]: Without dead ends: 41532 [2022-11-19 08:19:07,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:19:07,118 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 211 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:07,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1275 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:19:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41532 states. [2022-11-19 08:19:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41532 to 41532. [2022-11-19 08:19:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41532 states, 31961 states have (on average 1.6239792246800788) internal successors, (51904), 34013 states have internal predecessors, (51904), 6778 states have call successors, (6778), 1992 states have call predecessors, (6778), 2792 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-19 08:19:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41532 states to 41532 states and 71989 transitions. [2022-11-19 08:19:10,407 INFO L78 Accepts]: Start accepts. Automaton has 41532 states and 71989 transitions. Word has length 132 [2022-11-19 08:19:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 41532 states and 71989 transitions. [2022-11-19 08:19:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 08:19:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41532 states and 71989 transitions. [2022-11-19 08:19:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 08:19:10,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:10,421 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:10,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:10,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:19:10,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:19:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1487000355, now seen corresponding path program 1 times [2022-11-19 08:19:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375128943] [2022-11-19 08:19:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:10,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 08:19:12,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:12,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375128943] [2022-11-19 08:19:12,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375128943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:19:12,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949940416] [2022-11-19 08:19:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:12,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:12,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:12,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:12,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7a97a1-e5a8-4780-a444-721522e57487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:19:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:19:12,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:19:12,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:19:12,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949940416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:12,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:19:12,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-19 08:19:12,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035341472] [2022-11-19 08:19:12,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:12,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:19:12,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:19:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:19:12,795 INFO L87 Difference]: Start difference. First operand 41532 states and 71989 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20)