./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7 --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:34:36,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:34:36,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:34:36,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:34:36,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:34:36,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:34:36,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:34:36,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:34:36,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:34:36,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:34:36,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:34:36,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:34:36,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:34:36,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:34:36,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:34:36,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:34:36,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:34:36,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:34:36,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:34:36,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:34:36,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:34:36,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:34:36,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:34:36,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:34:36,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:34:36,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:34:36,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:34:36,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:34:36,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:34:36,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:34:36,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:34:36,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:34:36,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:34:36,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:34:36,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:34:36,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:34:36,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:34:36,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:34:36,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:34:36,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:34:36,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:34:36,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:34:36,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:34:36,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:34:36,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:34:36,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:34:36,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:34:36,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:34:36,322 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:34:36,322 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:34:36,322 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:34:36,322 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:34:36,322 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:34:36,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:34:36,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:34:36,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:34:36,323 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:34:36,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:34:36,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:34:36,324 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:34:36,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:34:36,325 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:34:36,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:34:36,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:34:36,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:34:36,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:34:36,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:34:36,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:34:36,326 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:34:36,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:34:36,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:34:36,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:34:36,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:34:36,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:34:36,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:36,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:34:36,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:34:36,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:34:36,328 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:34:36,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:34:36,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:34:36,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:34:36,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:34:36,329 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-11-25 20:34:36,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:34:36,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:34:36,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:34:36,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:34:36,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:34:36,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:36,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/30ba02e5b/c04b170f8a554d3f8f35758946e79cdb/FLAGd422adf41 [2021-11-25 20:34:37,185 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:34:37,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:37,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/30ba02e5b/c04b170f8a554d3f8f35758946e79cdb/FLAGd422adf41 [2021-11-25 20:34:37,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/30ba02e5b/c04b170f8a554d3f8f35758946e79cdb [2021-11-25 20:34:37,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:34:37,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:34:37,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:37,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:34:37,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:34:37,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:37,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609fda7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37, skipping insertion in model container [2021-11-25 20:34:37,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:37,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:34:37,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:34:37,810 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-25 20:34:37,814 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-25 20:34:37,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:37,900 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:34:37,916 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-25 20:34:37,917 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-25 20:34:37,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:37,965 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:34:37,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37 WrapperNode [2021-11-25 20:34:37,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:37,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:37,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:34:37,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:34:37,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:37,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,024 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 169 [2021-11-25 20:34:38,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:38,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:34:38,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:34:38,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:34:38,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:34:38,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:34:38,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:34:38,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:34:38,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (1/1) ... [2021-11-25 20:34:38,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:38,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:38,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:34:38,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:34:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:34:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:34:38,208 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:34:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:34:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:34:38,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:34:38,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:34:38,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:34:38,312 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:34:38,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:34:38,649 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:34:38,799 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:34:38,803 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:34:38,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:38 BoogieIcfgContainer [2021-11-25 20:34:38,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:34:38,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:34:38,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:34:38,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:34:38,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:34:37" (1/3) ... [2021-11-25 20:34:38,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32098af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:38, skipping insertion in model container [2021-11-25 20:34:38,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:37" (2/3) ... [2021-11-25 20:34:38,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32098af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:38, skipping insertion in model container [2021-11-25 20:34:38,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:38" (3/3) ... [2021-11-25 20:34:38,821 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:38,827 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:34:38,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:34:38,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:34:38,905 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:34:38,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:34:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 42 states have internal predecessors, (59), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:34:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:34:38,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:38,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:34:38,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 9849864, now seen corresponding path program 1 times [2021-11-25 20:34:38,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:38,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861239405] [2021-11-25 20:34:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:38,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:34:39,055 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:34:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:34:39,084 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:34:39,086 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:34:39,087 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 20:34:39,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 20:34:39,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:34:39,094 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 20:34:39,097 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:34:39,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:34:39 BoogieIcfgContainer [2021-11-25 20:34:39,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:34:39,116 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:34:39,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:34:39,117 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:34:39,117 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:38" (3/4) ... [2021-11-25 20:34:39,120 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:34:39,121 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:34:39,122 INFO L158 Benchmark]: Toolchain (without parser) took 1572.27ms. Allocated memory was 113.2MB in the beginning and 157.3MB in the end (delta: 44.0MB). Free memory was 82.2MB in the beginning and 87.5MB in the end (delta: -5.3MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,123 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:34:39,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.93ms. Allocated memory was 113.2MB in the beginning and 157.3MB in the end (delta: 44.0MB). Free memory was 81.9MB in the beginning and 127.4MB in the end (delta: -45.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,124 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.83ms. Allocated memory is still 157.3MB. Free memory was 127.4MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,125 INFO L158 Benchmark]: Boogie Preprocessor took 71.73ms. Allocated memory is still 157.3MB. Free memory was 125.3MB in the beginning and 124.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:34:39,126 INFO L158 Benchmark]: RCFGBuilder took 705.49ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 101.6MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,126 INFO L158 Benchmark]: TraceAbstraction took 305.07ms. Allocated memory is still 157.3MB. Free memory was 101.0MB in the beginning and 88.1MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,127 INFO L158 Benchmark]: Witness Printer took 4.36ms. Allocated memory is still 157.3MB. Free memory was 88.1MB in the beginning and 87.5MB in the end (delta: 624.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:34:39,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 414.93ms. Allocated memory was 113.2MB in the beginning and 157.3MB in the end (delta: 44.0MB). Free memory was 81.9MB in the beginning and 127.4MB in the end (delta: -45.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.83ms. Allocated memory is still 157.3MB. Free memory was 127.4MB in the beginning and 125.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.73ms. Allocated memory is still 157.3MB. Free memory was 125.3MB in the beginning and 124.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 705.49ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 101.6MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 305.07ms. Allocated memory is still 157.3MB. Free memory was 101.0MB in the beginning and 88.1MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.36ms. Allocated memory is still 157.3MB. Free memory was 88.1MB in the beginning and 87.5MB in the end (delta: 624.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 20:34:39,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7 --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:34:41,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:34:41,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:34:41,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:34:41,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:34:41,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:34:41,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:34:41,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:34:41,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:34:41,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:34:41,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:34:41,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:34:41,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:34:41,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:34:41,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:34:41,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:34:41,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:34:41,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:34:41,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:34:41,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:34:41,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:34:41,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:34:41,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:34:41,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:34:41,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:34:41,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:34:41,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:34:41,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:34:41,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:34:41,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:34:41,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:34:41,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:34:41,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:34:41,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:34:41,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:34:41,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:34:41,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:34:41,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:34:41,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:34:41,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:34:41,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:34:41,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:34:41,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:34:41,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:34:41,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:34:41,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:34:41,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:34:41,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:34:41,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:34:41,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:34:41,776 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:34:41,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:34:41,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:34:41,777 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:34:41,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:34:41,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:34:41,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:34:41,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:34:41,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:34:41,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:34:41,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:34:41,780 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:34:41,780 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:34:41,781 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:34:41,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:34:41,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:34:41,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:34:41,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:34:41,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:34:41,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:34:41,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:34:41,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:41,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:34:41,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:34:41,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:34:41,784 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:34:41,784 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:34:41,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:34:41,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:34:41,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:34:41,785 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-11-25 20:34:42,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:34:42,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:34:42,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:34:42,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:34:42,152 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:34:42,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:42,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/738f5f0a6/73f4eb913a744f14aaf0f4491a959b83/FLAGa82064b1b [2021-11-25 20:34:42,815 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:34:42,815 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:42,834 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/738f5f0a6/73f4eb913a744f14aaf0f4491a959b83/FLAGa82064b1b [2021-11-25 20:34:43,142 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/data/738f5f0a6/73f4eb913a744f14aaf0f4491a959b83 [2021-11-25 20:34:43,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:34:43,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:34:43,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:43,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:34:43,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:34:43,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef7b199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43, skipping insertion in model container [2021-11-25 20:34:43,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:34:43,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:34:43,380 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-25 20:34:43,386 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-25 20:34:43,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:43,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:34:43,561 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-25 20:34:43,562 WARN L230 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_97474f30-03af-4596-b8ce-e3624cc6f212/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-25 20:34:43,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:43,611 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:34:43,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43 WrapperNode [2021-11-25 20:34:43,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:43,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:43,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:34:43,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:34:43,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,686 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2021-11-25 20:34:43,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:43,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:34:43,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:34:43,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:34:43,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:34:43,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:34:43,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:34:43,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:34:43,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (1/1) ... [2021-11-25 20:34:43,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:43,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:34:43,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:34:43,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:34:43,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:34:43,851 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 20:34:43,852 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 20:34:43,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:34:43,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:34:43,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:34:43,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:34:43,949 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:34:43,950 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:34:46,515 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:34:46,525 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:34:46,525 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:34:46,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:46 BoogieIcfgContainer [2021-11-25 20:34:46,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:34:46,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:34:46,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:34:46,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:34:46,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:34:43" (1/3) ... [2021-11-25 20:34:46,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788fbdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:46, skipping insertion in model container [2021-11-25 20:34:46,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:43" (2/3) ... [2021-11-25 20:34:46,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788fbdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:46, skipping insertion in model container [2021-11-25 20:34:46,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:46" (3/3) ... [2021-11-25 20:34:46,537 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-11-25 20:34:46,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:34:46,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:34:46,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:34:46,606 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:34:46,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:34:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:34:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:34:46,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:46,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:46,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-25 20:34:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:34:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167656835] [2021-11-25 20:34:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:46,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:34:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:34:46,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:34:46,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:34:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:34:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:47,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:47,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:34:47,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167656835] [2021-11-25 20:34:47,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167656835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:47,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:47,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:34:47,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709862373] [2021-11-25 20:34:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:47,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:34:47,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:34:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:34:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:34:47,303 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:47,337 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-11-25 20:34:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:34:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:34:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:47,353 INFO L225 Difference]: With dead ends: 157 [2021-11-25 20:34:47,353 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:34:47,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:34:47,361 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:47,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:34:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:34:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-25 20:34:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:34:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2021-11-25 20:34:47,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2021-11-25 20:34:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:47,410 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2021-11-25 20:34:47,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2021-11-25 20:34:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:34:47,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:47,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:47,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:34:47,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-25 20:34:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:34:47,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888138022] [2021-11-25 20:34:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:47,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:34:47,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:34:47,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:34:47,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:45:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:45:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:45:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:45:34,292 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-25 20:46:24,510 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-25 20:46:26,557 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-25 20:46:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:46:26,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:26,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:26,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888138022] [2021-11-25 20:46:26,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888138022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:26,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:26,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:46:26,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723440344] [2021-11-25 20:46:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:26,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:46:26,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:46:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-11-25 20:46:26,564 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:46:28,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:46:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:29,229 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2021-11-25 20:46:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:46:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:46:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:29,233 INFO L225 Difference]: With dead ends: 74 [2021-11-25 20:46:29,233 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 20:46:29,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-11-25 20:46:29,236 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 103 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:29,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 274 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 209 Unchecked, 2.5s Time] [2021-11-25 20:46:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 20:46:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 20:46:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:46:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2021-11-25 20:46:29,251 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2021-11-25 20:46:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:29,252 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2021-11-25 20:46:29,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:46:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2021-11-25 20:46:29,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:46:29,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:29,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:29,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:29,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:29,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2021-11-25 20:46:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:29,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934120194] [2021-11-25 20:46:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:29,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:29,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:29,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:46:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:46:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:29,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:46:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:30,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934120194] [2021-11-25 20:46:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934120194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:46:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635165299] [2021-11-25 20:46:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:30,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:46:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:46:30,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:46:30,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-25 20:46:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:46:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:30,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:46:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:31,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635165299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:46:31,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317690839] [2021-11-25 20:46:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:31,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:46:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:46:31,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:46:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:46:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:46:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:31,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:46:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317690839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:46:31,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:46:31,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2021-11-25 20:46:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937532311] [2021-11-25 20:46:31,791 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:46:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:46:31,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:46:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:46:31,794 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:46:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:33,962 INFO L93 Difference]: Finished difference Result 325 states and 520 transitions. [2021-11-25 20:46:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:46:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-11-25 20:46:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:33,969 INFO L225 Difference]: With dead ends: 325 [2021-11-25 20:46:33,969 INFO L226 Difference]: Without dead ends: 280 [2021-11-25 20:46:33,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:46:33,972 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 270 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:33,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1595 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:46:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-25 20:46:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 113. [2021-11-25 20:46:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 96 states have internal predecessors, (135), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-25 20:46:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 169 transitions. [2021-11-25 20:46:34,011 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 169 transitions. Word has length 33 [2021-11-25 20:46:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:34,012 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 169 transitions. [2021-11-25 20:46:34,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 20:46:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 169 transitions. [2021-11-25 20:46:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:46:34,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:34,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:34,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:34,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:34,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:34,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:46:34,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1860757616, now seen corresponding path program 1 times [2021-11-25 20:46:34,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:34,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470228008] [2021-11-25 20:46:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:34,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:34,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:34,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:34,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:46:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:46:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:35,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:35,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470228008] [2021-11-25 20:46:35,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470228008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:35,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:35,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:46:35,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7666900] [2021-11-25 20:46:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:35,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:46:35,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:46:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:46:35,009 INFO L87 Difference]: Start difference. First operand 113 states and 169 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:35,439 INFO L93 Difference]: Finished difference Result 249 states and 374 transitions. [2021-11-25 20:46:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:46:35,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-25 20:46:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:35,449 INFO L225 Difference]: With dead ends: 249 [2021-11-25 20:46:35,449 INFO L226 Difference]: Without dead ends: 188 [2021-11-25 20:46:35,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:46:35,451 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:35,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 456 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:46:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-25 20:46:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-11-25 20:46:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.4125) internal successors, (226), 159 states have internal predecessors, (226), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-25 20:46:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2021-11-25 20:46:35,478 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 41 [2021-11-25 20:46:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:35,478 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2021-11-25 20:46:35,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2021-11-25 20:46:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:46:35,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:35,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:35,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:35,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:35,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1180699246, now seen corresponding path program 1 times [2021-11-25 20:46:35,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458963742] [2021-11-25 20:46:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:35,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:35,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:35,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:46:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:46:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:36,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:36,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:36,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458963742] [2021-11-25 20:46:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458963742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:36,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:36,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:46:36,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649996383] [2021-11-25 20:46:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:36,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:46:36,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:46:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:46:36,109 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:36,594 INFO L93 Difference]: Finished difference Result 257 states and 382 transitions. [2021-11-25 20:46:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:46:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-25 20:46:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:36,598 INFO L225 Difference]: With dead ends: 257 [2021-11-25 20:46:36,598 INFO L226 Difference]: Without dead ends: 202 [2021-11-25 20:46:36,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:46:36,600 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:36,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 542 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:46:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-25 20:46:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2021-11-25 20:46:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 153 states have (on average 1.392156862745098) internal successors, (213), 152 states have internal predecessors, (213), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-25 20:46:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 255 transitions. [2021-11-25 20:46:36,623 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 255 transitions. Word has length 41 [2021-11-25 20:46:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 255 transitions. [2021-11-25 20:46:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 255 transitions. [2021-11-25 20:46:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:46:36,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:36,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:36,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:36,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:36,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2021-11-25 20:46:36,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:36,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611202257] [2021-11-25 20:46:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:36,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:36,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:46:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:37,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:37,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:37,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611202257] [2021-11-25 20:46:37,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611202257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:37,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:37,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:37,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46500061] [2021-11-25 20:46:37,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:37,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:37,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:37,123 INFO L87 Difference]: Start difference. First operand 175 states and 255 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:37,243 INFO L93 Difference]: Finished difference Result 322 states and 476 transitions. [2021-11-25 20:46:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:46:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 20:46:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:37,247 INFO L225 Difference]: With dead ends: 322 [2021-11-25 20:46:37,247 INFO L226 Difference]: Without dead ends: 256 [2021-11-25 20:46:37,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:37,249 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 68 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:37,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 340 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:46:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-25 20:46:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 224. [2021-11-25 20:46:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 200 states have (on average 1.35) internal successors, (270), 199 states have internal predecessors, (270), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-25 20:46:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 316 transitions. [2021-11-25 20:46:37,274 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 316 transitions. Word has length 44 [2021-11-25 20:46:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 316 transitions. [2021-11-25 20:46:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 316 transitions. [2021-11-25 20:46:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:46:37,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:37,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:37,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-25 20:46:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:37,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1309251479, now seen corresponding path program 1 times [2021-11-25 20:46:37,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010791944] [2021-11-25 20:46:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:37,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:37,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:37,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:46:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:46:37,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:37,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:37,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010791944] [2021-11-25 20:46:37,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010791944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:37,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495847288] [2021-11-25 20:46:37,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:37,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:37,881 INFO L87 Difference]: Start difference. First operand 224 states and 316 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:46:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:38,114 INFO L93 Difference]: Finished difference Result 368 states and 519 transitions. [2021-11-25 20:46:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:46:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-11-25 20:46:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:38,118 INFO L225 Difference]: With dead ends: 368 [2021-11-25 20:46:38,118 INFO L226 Difference]: Without dead ends: 148 [2021-11-25 20:46:38,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:38,120 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:38,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:46:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-25 20:46:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2021-11-25 20:46:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 120 states have (on average 1.325) internal successors, (159), 122 states have internal predecessors, (159), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-25 20:46:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 186 transitions. [2021-11-25 20:46:38,138 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 186 transitions. Word has length 44 [2021-11-25 20:46:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:38,139 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 186 transitions. [2021-11-25 20:46:38,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:46:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 186 transitions. [2021-11-25 20:46:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:46:38,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:38,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:38,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:38,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:38,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:38,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2021-11-25 20:46:38,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:38,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357010079] [2021-11-25 20:46:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:38,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:38,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:38,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:46:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:38,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:46:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:46:39,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:46:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:39,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357010079] [2021-11-25 20:46:39,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357010079] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:46:39,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:46:39,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-25 20:46:39,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289311698] [2021-11-25 20:46:39,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:39,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:46:39,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:46:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:46:39,813 INFO L87 Difference]: Start difference. First operand 136 states and 186 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:41,408 INFO L93 Difference]: Finished difference Result 268 states and 393 transitions. [2021-11-25 20:46:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:46:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-25 20:46:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:41,412 INFO L225 Difference]: With dead ends: 268 [2021-11-25 20:46:41,412 INFO L226 Difference]: Without dead ends: 232 [2021-11-25 20:46:41,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:46:41,414 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 193 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:41,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 498 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:46:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-25 20:46:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 164. [2021-11-25 20:46:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 148 states have internal predecessors, (191), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2021-11-25 20:46:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 224 transitions. [2021-11-25 20:46:41,435 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 224 transitions. Word has length 45 [2021-11-25 20:46:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:41,436 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 224 transitions. [2021-11-25 20:46:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 224 transitions. [2021-11-25 20:46:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:46:41,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:41,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:41,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:41,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:41,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2021-11-25 20:46:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707704201] [2021-11-25 20:46:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:41,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:41,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:41,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:46:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:46:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:41,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:41,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707704201] [2021-11-25 20:46:41,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707704201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:41,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:46:41,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868958570] [2021-11-25 20:46:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:46:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:46:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:41,872 INFO L87 Difference]: Start difference. First operand 164 states and 224 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:41,997 INFO L93 Difference]: Finished difference Result 171 states and 230 transitions. [2021-11-25 20:46:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:46:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-25 20:46:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:42,000 INFO L225 Difference]: With dead ends: 171 [2021-11-25 20:46:42,000 INFO L226 Difference]: Without dead ends: 164 [2021-11-25 20:46:42,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:46:42,002 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:42,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 383 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:46:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-25 20:46:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-25 20:46:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 145 states have (on average 1.296551724137931) internal successors, (188), 148 states have internal predecessors, (188), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2021-11-25 20:46:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 221 transitions. [2021-11-25 20:46:42,025 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 221 transitions. Word has length 45 [2021-11-25 20:46:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 221 transitions. [2021-11-25 20:46:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 221 transitions. [2021-11-25 20:46:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:46:42,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:42,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:42,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:42,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:42,241 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 2 times [2021-11-25 20:46:42,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:42,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898415486] [2021-11-25 20:46:42,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:46:42,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:42,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:42,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:42,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:46:42,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 20:46:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:46:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:46:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:46:42,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:42,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898415486] [2021-11-25 20:46:42,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898415486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:42,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:42,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:46:42,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592367098] [2021-11-25 20:46:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:42,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:46:42,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:46:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:46:42,727 INFO L87 Difference]: Start difference. First operand 164 states and 221 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:43,047 INFO L93 Difference]: Finished difference Result 203 states and 278 transitions. [2021-11-25 20:46:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:46:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-25 20:46:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:43,051 INFO L225 Difference]: With dead ends: 203 [2021-11-25 20:46:43,051 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 20:46:43,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:46:43,052 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:43,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 601 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2021-11-25 20:46:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 20:46:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 168. [2021-11-25 20:46:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 151 states have internal predecessors, (191), 14 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2021-11-25 20:46:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 224 transitions. [2021-11-25 20:46:43,075 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 224 transitions. Word has length 45 [2021-11-25 20:46:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:43,076 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 224 transitions. [2021-11-25 20:46:43,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 224 transitions. [2021-11-25 20:46:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:46:43,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:43,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:43,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:43,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:43,292 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 514323257, now seen corresponding path program 1 times [2021-11-25 20:46:43,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036144856] [2021-11-25 20:46:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:43,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:43,296 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:43,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:46:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:46:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:46:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:43,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036144856] [2021-11-25 20:46:43,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036144856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:43,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:43,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:46:43,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008595101] [2021-11-25 20:46:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:43,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:46:43,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:46:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:46:43,706 INFO L87 Difference]: Start difference. First operand 168 states and 224 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:43,951 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2021-11-25 20:46:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:46:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-25 20:46:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:43,954 INFO L225 Difference]: With dead ends: 213 [2021-11-25 20:46:43,955 INFO L226 Difference]: Without dead ends: 211 [2021-11-25 20:46:43,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:46:43,956 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:43,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 472 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-25 20:46:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-25 20:46:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 172. [2021-11-25 20:46:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 151 states have (on average 1.2847682119205297) internal successors, (194), 154 states have internal predecessors, (194), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2021-11-25 20:46:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2021-11-25 20:46:43,977 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 45 [2021-11-25 20:46:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2021-11-25 20:46:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2021-11-25 20:46:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:46:43,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:43,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:43,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:44,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:44,194 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2021-11-25 20:46:44,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:44,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138621720] [2021-11-25 20:46:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:44,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:44,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 20:46:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:44,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:44,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138621720] [2021-11-25 20:46:44,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138621720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:44,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:44,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:44,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873740266] [2021-11-25 20:46:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:44,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:44,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:44,448 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:44,571 INFO L93 Difference]: Finished difference Result 284 states and 385 transitions. [2021-11-25 20:46:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:46:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-11-25 20:46:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:44,575 INFO L225 Difference]: With dead ends: 284 [2021-11-25 20:46:44,575 INFO L226 Difference]: Without dead ends: 232 [2021-11-25 20:46:44,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:44,577 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 77 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:44,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 316 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:46:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-25 20:46:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 191. [2021-11-25 20:46:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 169 states have (on average 1.2899408284023668) internal successors, (218), 171 states have internal predecessors, (218), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2021-11-25 20:46:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 253 transitions. [2021-11-25 20:46:44,602 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 253 transitions. Word has length 46 [2021-11-25 20:46:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:44,603 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 253 transitions. [2021-11-25 20:46:44,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 253 transitions. [2021-11-25 20:46:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:46:44,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:44,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:44,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:44,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2021-11-25 20:46:44,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:44,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8319166] [2021-11-25 20:46:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:44,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:44,823 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:44,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:46:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:45,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:45,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8319166] [2021-11-25 20:46:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8319166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:45,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:45,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:45,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719346205] [2021-11-25 20:46:45,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:45,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:45,008 INFO L87 Difference]: Start difference. First operand 191 states and 253 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:45,098 INFO L93 Difference]: Finished difference Result 206 states and 269 transitions. [2021-11-25 20:46:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:46:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-25 20:46:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:45,101 INFO L225 Difference]: With dead ends: 206 [2021-11-25 20:46:45,102 INFO L226 Difference]: Without dead ends: 167 [2021-11-25 20:46:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:45,103 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:45,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:46:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-25 20:46:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-25 20:46:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.303448275862069) internal successors, (189), 148 states have internal predecessors, (189), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-25 20:46:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 222 transitions. [2021-11-25 20:46:45,121 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 222 transitions. Word has length 49 [2021-11-25 20:46:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:45,121 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 222 transitions. [2021-11-25 20:46:45,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 222 transitions. [2021-11-25 20:46:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:46:45,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:45,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:45,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:45,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:45,342 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2021-11-25 20:46:45,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240035383] [2021-11-25 20:46:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:45,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:45,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:45,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 20:46:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:46:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:46:45,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:45,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240035383] [2021-11-25 20:46:45,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240035383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:45,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:45,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:46:45,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672324990] [2021-11-25 20:46:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:46:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:46:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:45,635 INFO L87 Difference]: Start difference. First operand 167 states and 222 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:45,954 INFO L93 Difference]: Finished difference Result 242 states and 327 transitions. [2021-11-25 20:46:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:46:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-25 20:46:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:45,957 INFO L225 Difference]: With dead ends: 242 [2021-11-25 20:46:45,957 INFO L226 Difference]: Without dead ends: 200 [2021-11-25 20:46:45,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:46:45,965 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 131 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:45,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 345 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:46:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-25 20:46:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-11-25 20:46:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.289655172413793) internal successors, (187), 148 states have internal predecessors, (187), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-25 20:46:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-11-25 20:46:45,982 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 50 [2021-11-25 20:46:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:45,983 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-11-25 20:46:45,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-11-25 20:46:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:46:45,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:45,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:46,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:46,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:46,197 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2021-11-25 20:46:46,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:46,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937178013] [2021-11-25 20:46:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:46,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:46,199 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:46,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 20:46:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:46:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:46:46,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:46,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937178013] [2021-11-25 20:46:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937178013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:46,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:46,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:46,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763966635] [2021-11-25 20:46:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:46,427 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:46,692 INFO L93 Difference]: Finished difference Result 240 states and 313 transitions. [2021-11-25 20:46:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:46:46,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-25 20:46:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:46,695 INFO L225 Difference]: With dead ends: 240 [2021-11-25 20:46:46,695 INFO L226 Difference]: Without dead ends: 213 [2021-11-25 20:46:46,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:46,696 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 112 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:46,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 260 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:46:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-25 20:46:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-11-25 20:46:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.282758620689655) internal successors, (186), 148 states have internal predecessors, (186), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-25 20:46:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2021-11-25 20:46:46,716 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 50 [2021-11-25 20:46:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:46,716 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2021-11-25 20:46:46,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2021-11-25 20:46:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:46:46,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:46,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:46,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:46,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:46,933 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2021-11-25 20:46:46,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:46,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594978328] [2021-11-25 20:46:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:46,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:46,934 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:46,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 20:46:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:46:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:47,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:47,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:47,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594978328] [2021-11-25 20:46:47,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594978328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:47,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:47,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:46:47,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660874566] [2021-11-25 20:46:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:47,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:46:47,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:46:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:46:47,345 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:48,663 INFO L93 Difference]: Finished difference Result 271 states and 371 transitions. [2021-11-25 20:46:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:46:48,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-25 20:46:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:48,667 INFO L225 Difference]: With dead ends: 271 [2021-11-25 20:46:48,667 INFO L226 Difference]: Without dead ends: 247 [2021-11-25 20:46:48,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:46:48,668 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 177 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:48,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 580 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:46:48,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-25 20:46:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 200. [2021-11-25 20:46:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 178 states have internal predecessors, (223), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2021-11-25 20:46:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 264 transitions. [2021-11-25 20:46:48,701 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 264 transitions. Word has length 51 [2021-11-25 20:46:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:48,702 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 264 transitions. [2021-11-25 20:46:48,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 264 transitions. [2021-11-25 20:46:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 20:46:48,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:48,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:48,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:48,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:48,919 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2021-11-25 20:46:48,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:48,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764109251] [2021-11-25 20:46:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:48,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:48,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 20:46:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:49,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:49,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764109251] [2021-11-25 20:46:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764109251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:49,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:49,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:49,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467916314] [2021-11-25 20:46:49,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:49,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:49,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:49,218 INFO L87 Difference]: Start difference. First operand 200 states and 264 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:49,344 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-11-25 20:46:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:46:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-25 20:46:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:49,347 INFO L225 Difference]: With dead ends: 242 [2021-11-25 20:46:49,347 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 20:46:49,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:49,349 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 87 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:49,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 233 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:46:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 20:46:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2021-11-25 20:46:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 174 states have (on average 1.2126436781609196) internal successors, (211), 178 states have internal predecessors, (211), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2021-11-25 20:46:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 252 transitions. [2021-11-25 20:46:49,373 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 252 transitions. Word has length 51 [2021-11-25 20:46:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:49,374 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 252 transitions. [2021-11-25 20:46:49,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 252 transitions. [2021-11-25 20:46:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:46:49,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:49,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:49,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:49,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:49,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1153296820, now seen corresponding path program 1 times [2021-11-25 20:46:49,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:49,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308565410] [2021-11-25 20:46:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:49,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:49,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:49,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 20:46:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:46:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:49,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:49,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:49,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308565410] [2021-11-25 20:46:49,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308565410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:49,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:49,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:46:49,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632656811] [2021-11-25 20:46:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:49,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:46:49,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:46:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:46:49,827 INFO L87 Difference]: Start difference. First operand 200 states and 252 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:49,924 INFO L93 Difference]: Finished difference Result 209 states and 260 transitions. [2021-11-25 20:46:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:46:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-11-25 20:46:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:49,926 INFO L225 Difference]: With dead ends: 209 [2021-11-25 20:46:49,927 INFO L226 Difference]: Without dead ends: 168 [2021-11-25 20:46:49,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:46:49,928 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:49,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:46:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-25 20:46:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2021-11-25 20:46:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.223021582733813) internal successors, (170), 144 states have internal predecessors, (170), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-25 20:46:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-11-25 20:46:49,955 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 53 [2021-11-25 20:46:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:49,955 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-11-25 20:46:49,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-11-25 20:46:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:46:49,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:49,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:46:49,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:50,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:50,171 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2021-11-25 20:46:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27211893] [2021-11-25 20:46:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:50,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:50,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:50,173 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:50,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 20:46:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:46:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:46:50,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:50,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:50,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27211893] [2021-11-25 20:46:50,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27211893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:50,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:50,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:46:50,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900987493] [2021-11-25 20:46:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:50,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:46:50,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:50,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:46:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:46:50,588 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:51,476 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-11-25 20:46:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:46:51,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-11-25 20:46:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:51,479 INFO L225 Difference]: With dead ends: 235 [2021-11-25 20:46:51,479 INFO L226 Difference]: Without dead ends: 186 [2021-11-25 20:46:51,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:46:51,481 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 87 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 495 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:46:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-25 20:46:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2021-11-25 20:46:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 20:46:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2021-11-25 20:46:51,508 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 53 [2021-11-25 20:46:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:51,508 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2021-11-25 20:46:51,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:46:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2021-11-25 20:46:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 20:46:51,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:51,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:51,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:51,725 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2021-11-25 20:46:51,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:51,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316104450] [2021-11-25 20:46:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:51,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:51,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:51,726 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:51,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 20:46:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:51,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:46:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:46:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:46:54,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:46:54,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:46:54,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316104450] [2021-11-25 20:46:54,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316104450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:46:54,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:46:54,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:46:54,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967693992] [2021-11-25 20:46:54,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:46:54,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:46:54,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:46:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:46:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-25 20:46:54,729 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:46:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:46:54,852 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2021-11-25 20:46:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:46:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-11-25 20:46:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:46:54,855 INFO L225 Difference]: With dead ends: 144 [2021-11-25 20:46:54,855 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 20:46:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-11-25 20:46:54,856 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:46:54,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 330 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-25 20:46:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 20:46:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 20:46:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 123 states have internal predecessors, (144), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-25 20:46:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2021-11-25 20:46:54,880 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 55 [2021-11-25 20:46:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:46:54,880 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2021-11-25 20:46:54,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:46:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2021-11-25 20:46:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:46:54,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:46:54,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:46:54,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 20:46:55,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:46:55,097 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:46:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:46:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2021-11-25 20:46:55,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:46:55,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964627361] [2021-11-25 20:46:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:46:55,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:46:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:46:55,100 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:46:55,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-25 20:46:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:46:55,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:46:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:00,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:00,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:00,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964627361] [2021-11-25 20:47:00,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964627361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:00,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:00,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:47:00,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995414532] [2021-11-25 20:47:00,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:00,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:47:00,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:47:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=37, Unknown=2, NotChecked=0, Total=56 [2021-11-25 20:47:00,250 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:00,373 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2021-11-25 20:47:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:47:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-11-25 20:47:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:00,376 INFO L225 Difference]: With dead ends: 184 [2021-11-25 20:47:00,377 INFO L226 Difference]: Without dead ends: 182 [2021-11-25 20:47:00,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2021-11-25 20:47:00,378 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 39 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:00,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 567 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 61 Unchecked, 0.0s Time] [2021-11-25 20:47:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-25 20:47:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2021-11-25 20:47:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 121 states have internal predecessors, (144), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 20:47:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2021-11-25 20:47:00,400 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 56 [2021-11-25 20:47:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:00,400 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2021-11-25 20:47:00,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2021-11-25 20:47:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 20:47:00,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:00,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:00,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:00,616 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 590846065, now seen corresponding path program 1 times [2021-11-25 20:47:00,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:00,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881607421] [2021-11-25 20:47:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:00,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:00,620 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:00,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 20:47:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 20:47:00,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:02,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881607421] [2021-11-25 20:47:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881607421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:02,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:47:02,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915542617] [2021-11-25 20:47:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:47:02,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:47:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:47:02,192 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:06,541 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2021-11-25 20:47:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:47:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-11-25 20:47:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:06,545 INFO L225 Difference]: With dead ends: 202 [2021-11-25 20:47:06,545 INFO L226 Difference]: Without dead ends: 190 [2021-11-25 20:47:06,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:47:06,547 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 164 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:06,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1025 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:47:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-25 20:47:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 140. [2021-11-25 20:47:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 121 states have internal predecessors, (142), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 20:47:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 174 transitions. [2021-11-25 20:47:06,568 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 174 transitions. Word has length 59 [2021-11-25 20:47:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:06,568 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 174 transitions. [2021-11-25 20:47:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 174 transitions. [2021-11-25 20:47:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:47:06,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:06,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:06,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-25 20:47:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:06,784 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2021-11-25 20:47:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804548423] [2021-11-25 20:47:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:06,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:06,786 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:06,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 20:47:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:47:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:07,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:07,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:07,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804548423] [2021-11-25 20:47:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804548423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:07,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:07,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:47:07,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911318704] [2021-11-25 20:47:07,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:07,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:47:07,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:47:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:47:07,102 INFO L87 Difference]: Start difference. First operand 140 states and 174 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:47:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:07,363 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-11-25 20:47:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:47:07,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-11-25 20:47:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:07,366 INFO L225 Difference]: With dead ends: 159 [2021-11-25 20:47:07,366 INFO L226 Difference]: Without dead ends: 157 [2021-11-25 20:47:07,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:47:07,367 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 40 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:07,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 492 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:47:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-25 20:47:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-11-25 20:47:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.218487394957983) internal successors, (145), 124 states have internal predecessors, (145), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 20:47:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 177 transitions. [2021-11-25 20:47:07,387 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 177 transitions. Word has length 61 [2021-11-25 20:47:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:07,387 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 177 transitions. [2021-11-25 20:47:07,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:47:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 177 transitions. [2021-11-25 20:47:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:47:07,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:07,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:07,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:07,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:07,602 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1933907116, now seen corresponding path program 1 times [2021-11-25 20:47:07,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:07,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097956666] [2021-11-25 20:47:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:07,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:07,605 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:07,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 20:47:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:47:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:08,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:08,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:08,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097956666] [2021-11-25 20:47:08,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097956666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:08,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:08,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:47:08,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838507237] [2021-11-25 20:47:08,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:08,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:47:08,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:47:08,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:47:08,910 INFO L87 Difference]: Start difference. First operand 144 states and 177 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:14,065 INFO L93 Difference]: Finished difference Result 372 states and 486 transitions. [2021-11-25 20:47:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:47:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-11-25 20:47:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:14,068 INFO L225 Difference]: With dead ends: 372 [2021-11-25 20:47:14,068 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 20:47:14,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:47:14,070 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 432 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:14,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1059 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:47:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 20:47:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 170. [2021-11-25 20:47:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 142 states have (on average 1.204225352112676) internal successors, (171), 148 states have internal predecessors, (171), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 20:47:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-11-25 20:47:14,096 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 61 [2021-11-25 20:47:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:14,097 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-11-25 20:47:14,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-11-25 20:47:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:47:14,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:14,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:14,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-25 20:47:14,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:14,311 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash -131344237, now seen corresponding path program 1 times [2021-11-25 20:47:14,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166814821] [2021-11-25 20:47:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:14,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:14,313 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:14,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 20:47:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:47:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:14,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:14,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166814821] [2021-11-25 20:47:14,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166814821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:14,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:14,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:47:14,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437424585] [2021-11-25 20:47:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:14,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:47:14,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:47:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:47:14,615 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:47:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:14,894 INFO L93 Difference]: Finished difference Result 192 states and 235 transitions. [2021-11-25 20:47:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:47:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-11-25 20:47:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:14,896 INFO L225 Difference]: With dead ends: 192 [2021-11-25 20:47:14,896 INFO L226 Difference]: Without dead ends: 190 [2021-11-25 20:47:14,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:47:14,898 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 34 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:14,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 489 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:47:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-25 20:47:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 175. [2021-11-25 20:47:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.2) internal successors, (174), 152 states have internal predecessors, (174), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:47:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2021-11-25 20:47:14,923 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 61 [2021-11-25 20:47:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:14,924 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2021-11-25 20:47:14,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:47:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2021-11-25 20:47:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:47:14,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:14,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:14,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:15,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:15,139 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2021-11-25 20:47:15,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342978591] [2021-11-25 20:47:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:15,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:15,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:15,142 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:15,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 20:47:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:47:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:17,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:17,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342978591] [2021-11-25 20:47:17,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342978591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:17,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:17,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:47:17,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460945448] [2021-11-25 20:47:17,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:17,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:47:17,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:47:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:47:17,335 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:18,771 INFO L93 Difference]: Finished difference Result 302 states and 381 transitions. [2021-11-25 20:47:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:47:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2021-11-25 20:47:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:18,775 INFO L225 Difference]: With dead ends: 302 [2021-11-25 20:47:18,775 INFO L226 Difference]: Without dead ends: 282 [2021-11-25 20:47:18,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:47:18,776 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 95 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:18,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1092 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 396 Unchecked, 0.3s Time] [2021-11-25 20:47:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-25 20:47:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 183. [2021-11-25 20:47:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:47:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 225 transitions. [2021-11-25 20:47:18,813 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 225 transitions. Word has length 66 [2021-11-25 20:47:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:18,814 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 225 transitions. [2021-11-25 20:47:18,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 225 transitions. [2021-11-25 20:47:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:47:18,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:18,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:18,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:19,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:19,029 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash 979776617, now seen corresponding path program 1 times [2021-11-25 20:47:19,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:19,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928287359] [2021-11-25 20:47:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:19,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:19,032 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 20:47:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:19,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:47:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:22,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:22,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:22,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928287359] [2021-11-25 20:47:22,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928287359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:22,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:22,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:47:22,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927205190] [2021-11-25 20:47:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:22,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:47:22,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:47:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:47:22,120 INFO L87 Difference]: Start difference. First operand 183 states and 225 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:22,718 INFO L93 Difference]: Finished difference Result 224 states and 276 transitions. [2021-11-25 20:47:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:47:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2021-11-25 20:47:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:22,722 INFO L225 Difference]: With dead ends: 224 [2021-11-25 20:47:22,722 INFO L226 Difference]: Without dead ends: 204 [2021-11-25 20:47:22,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:47:22,724 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 12 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:22,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 560 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-11-25 20:47:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-25 20:47:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2021-11-25 20:47:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 158 states have internal predecessors, (181), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:47:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 223 transitions. [2021-11-25 20:47:22,753 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 223 transitions. Word has length 66 [2021-11-25 20:47:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:22,753 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 223 transitions. [2021-11-25 20:47:22,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 223 transitions. [2021-11-25 20:47:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:47:22,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:22,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:22,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:22,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:22,968 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1210749100, now seen corresponding path program 1 times [2021-11-25 20:47:22,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:22,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428010517] [2021-11-25 20:47:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:22,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:22,969 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:22,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 20:47:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:47:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:47:26,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:47:29,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:29,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428010517] [2021-11-25 20:47:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428010517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:47:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881571172] [2021-11-25 20:47:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:29,534 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:47:29,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:47:29,535 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:47:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-25 20:47:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:47:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:36,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881571172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:36,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:47:36,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 21 [2021-11-25 20:47:36,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204507823] [2021-11-25 20:47:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:36,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:47:36,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:47:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=530, Unknown=3, NotChecked=0, Total=600 [2021-11-25 20:47:36,061 INFO L87 Difference]: Start difference. First operand 182 states and 223 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:36,681 INFO L93 Difference]: Finished difference Result 319 states and 404 transitions. [2021-11-25 20:47:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:47:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-11-25 20:47:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:36,684 INFO L225 Difference]: With dead ends: 319 [2021-11-25 20:47:36,685 INFO L226 Difference]: Without dead ends: 299 [2021-11-25 20:47:36,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=81, Invalid=618, Unknown=3, NotChecked=0, Total=702 [2021-11-25 20:47:36,687 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:36,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1162 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 414 Unchecked, 0.2s Time] [2021-11-25 20:47:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-25 20:47:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 184. [2021-11-25 20:47:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.2091503267973855) internal successors, (185), 160 states have internal predecessors, (185), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:47:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 227 transitions. [2021-11-25 20:47:36,724 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 227 transitions. Word has length 67 [2021-11-25 20:47:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:36,725 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 227 transitions. [2021-11-25 20:47:36,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 227 transitions. [2021-11-25 20:47:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:47:36,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:36,727 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:36,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-25 20:47:36,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-25 20:47:37,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:47:37,142 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1980026946, now seen corresponding path program 1 times [2021-11-25 20:47:37,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:37,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025545207] [2021-11-25 20:47:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:37,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:37,144 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:37,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-25 20:47:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:47:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:38,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:38,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025545207] [2021-11-25 20:47:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025545207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:38,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:38,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:47:38,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116026236] [2021-11-25 20:47:38,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:47:38,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:47:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:47:38,981 INFO L87 Difference]: Start difference. First operand 184 states and 227 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:42,718 INFO L93 Difference]: Finished difference Result 270 states and 336 transitions. [2021-11-25 20:47:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:47:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-11-25 20:47:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:42,724 INFO L225 Difference]: With dead ends: 270 [2021-11-25 20:47:42,724 INFO L226 Difference]: Without dead ends: 262 [2021-11-25 20:47:42,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:47:42,733 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 172 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:42,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 742 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:47:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-25 20:47:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 185. [2021-11-25 20:47:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 161 states have internal predecessors, (185), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:47:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 227 transitions. [2021-11-25 20:47:42,776 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 227 transitions. Word has length 67 [2021-11-25 20:47:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 227 transitions. [2021-11-25 20:47:42,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 227 transitions. [2021-11-25 20:47:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:47:42,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:42,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:42,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:42,993 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1720222190, now seen corresponding path program 1 times [2021-11-25 20:47:42,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537812996] [2021-11-25 20:47:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:42,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:42,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:42,996 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:43,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-25 20:47:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:47:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:43,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:43,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537812996] [2021-11-25 20:47:43,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537812996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:43,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:43,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:47:43,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443194123] [2021-11-25 20:47:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:43,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:47:43,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:47:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:47:43,800 INFO L87 Difference]: Start difference. First operand 185 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:44,437 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2021-11-25 20:47:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:47:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-11-25 20:47:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:44,439 INFO L225 Difference]: With dead ends: 288 [2021-11-25 20:47:44,439 INFO L226 Difference]: Without dead ends: 268 [2021-11-25 20:47:44,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:47:44,440 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 71 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:44,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 706 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2021-11-25 20:47:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-25 20:47:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 175. [2021-11-25 20:47:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 152 states have internal predecessors, (173), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 20:47:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-11-25 20:47:44,477 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 67 [2021-11-25 20:47:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:44,477 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-11-25 20:47:44,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:47:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-11-25 20:47:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:47:44,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:44,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:44,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:44,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:44,692 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -7943642, now seen corresponding path program 1 times [2021-11-25 20:47:44,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:44,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60353159] [2021-11-25 20:47:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:44,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:44,694 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-25 20:47:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:47:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:44,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:44,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60353159] [2021-11-25 20:47:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60353159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:44,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:44,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:47:44,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371097600] [2021-11-25 20:47:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:47:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:47:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:47:44,969 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:47:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:45,174 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-11-25 20:47:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:47:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-11-25 20:47:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:45,176 INFO L225 Difference]: With dead ends: 210 [2021-11-25 20:47:45,176 INFO L226 Difference]: Without dead ends: 196 [2021-11-25 20:47:45,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:47:45,177 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 30 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:45,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 474 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:47:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-25 20:47:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2021-11-25 20:47:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 149 states have internal predecessors, (165), 21 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:47:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2021-11-25 20:47:45,211 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 69 [2021-11-25 20:47:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:45,212 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2021-11-25 20:47:45,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:47:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2021-11-25 20:47:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 20:47:45,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:45,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:45,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:45,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:45,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1053686940, now seen corresponding path program 1 times [2021-11-25 20:47:45,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:45,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378540859] [2021-11-25 20:47:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:45,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:45,429 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-25 20:47:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:47:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:47:45,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:45,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378540859] [2021-11-25 20:47:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378540859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:45,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:45,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:47:45,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132912542] [2021-11-25 20:47:45,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:45,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:47:45,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:47:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:47:45,709 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:47:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:45,924 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2021-11-25 20:47:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:47:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-11-25 20:47:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:45,926 INFO L225 Difference]: With dead ends: 200 [2021-11-25 20:47:45,926 INFO L226 Difference]: Without dead ends: 186 [2021-11-25 20:47:45,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:47:45,927 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 30 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:45,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 474 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:47:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-25 20:47:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-11-25 20:47:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.194915254237288) internal successors, (141), 124 states have internal predecessors, (141), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 20:47:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2021-11-25 20:47:45,956 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 69 [2021-11-25 20:47:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:45,956 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2021-11-25 20:47:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 20:47:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2021-11-25 20:47:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:47:45,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:45,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:45,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:46,172 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1492423721, now seen corresponding path program 1 times [2021-11-25 20:47:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:46,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851174200] [2021-11-25 20:47:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:46,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:46,174 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:46,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-25 20:47:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:47:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:47:46,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:46,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851174200] [2021-11-25 20:47:46,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851174200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:46,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:46,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:47:46,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838220227] [2021-11-25 20:47:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:46,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:47:46,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:47:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:47:46,495 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:46,593 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2021-11-25 20:47:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:47:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-11-25 20:47:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:46,595 INFO L225 Difference]: With dead ends: 171 [2021-11-25 20:47:46,595 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 20:47:46,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:47:46,596 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 43 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:46,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 250 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:47:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 20:47:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-11-25 20:47:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:47:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-11-25 20:47:46,611 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 70 [2021-11-25 20:47:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:46,612 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-11-25 20:47:46,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-11-25 20:47:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:47:46,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:46,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:46,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:46,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:46,816 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash -751559577, now seen corresponding path program 1 times [2021-11-25 20:47:46,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467363882] [2021-11-25 20:47:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:46,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:46,817 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-25 20:47:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:47:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:47:47,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:47:48,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467363882] [2021-11-25 20:47:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467363882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:47:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [884638470] [2021-11-25 20:47:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:48,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:47:48,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:47:48,262 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:47:48,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-25 20:47:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:47:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:47:48,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:48,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [884638470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:48,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:47:48,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-25 20:47:48,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791211305] [2021-11-25 20:47:48,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:48,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:47:48,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:47:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:47:48,904 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:49,475 INFO L93 Difference]: Finished difference Result 176 states and 200 transitions. [2021-11-25 20:47:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:47:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-11-25 20:47:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:49,477 INFO L225 Difference]: With dead ends: 176 [2021-11-25 20:47:49,477 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 20:47:49,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:47:49,479 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 123 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:49,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 242 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:47:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 20:47:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-11-25 20:47:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.141304347826087) internal successors, (105), 94 states have internal predecessors, (105), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:47:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2021-11-25 20:47:49,496 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 70 [2021-11-25 20:47:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:49,496 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2021-11-25 20:47:49,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:47:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2021-11-25 20:47:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:47:49,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:49,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:49,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-25 20:47:49,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:47:49,912 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash -49959703, now seen corresponding path program 1 times [2021-11-25 20:47:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:49,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946291135] [2021-11-25 20:47:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:49,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:49,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:49,917 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-25 20:47:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:47:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:47:50,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:47:51,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:51,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946291135] [2021-11-25 20:47:51,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946291135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:47:51,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715785585] [2021-11-25 20:47:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:51,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:47:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:47:51,740 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:47:51,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-25 20:47:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:51,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:47:51,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:47:52,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:47:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:47:52,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715785585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:47:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616052634] [2021-11-25 20:47:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:52,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:47:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:47:52,558 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:47:52,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 20:47:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:47:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:47:52,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:47:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:47:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616052634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:47:53,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 20:47:53,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8] total 11 [2021-11-25 20:47:53,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004738261] [2021-11-25 20:47:53,366 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 20:47:53,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:47:53,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:47:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:47:53,368 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:47:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:53,810 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-11-25 20:47:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:47:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 70 [2021-11-25 20:47:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:53,812 INFO L225 Difference]: With dead ends: 120 [2021-11-25 20:47:53,812 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 20:47:53,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 366 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:47:53,813 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 28 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:53,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 571 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2021-11-25 20:47:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 20:47:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 20:47:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 57 states have internal predecessors, (64), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:47:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-11-25 20:47:53,824 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 70 [2021-11-25 20:47:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:53,824 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-11-25 20:47:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:47:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-11-25 20:47:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:47:53,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:53,826 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:53,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:54,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-25 20:47:54,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-25 20:47:54,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:54,429 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash -437028168, now seen corresponding path program 1 times [2021-11-25 20:47:54,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:54,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677356968] [2021-11-25 20:47:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:54,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:54,431 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-25 20:47:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:47:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:47:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:47:58,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:47:58,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:47:58,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677356968] [2021-11-25 20:47:58,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677356968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:47:58,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:47:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:47:58,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24717015] [2021-11-25 20:47:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:47:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:47:58,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:47:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:47:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2021-11-25 20:47:58,349 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:47:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:47:59,452 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2021-11-25 20:47:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:47:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-11-25 20:47:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:47:59,454 INFO L225 Difference]: With dead ends: 105 [2021-11-25 20:47:59,454 INFO L226 Difference]: Without dead ends: 97 [2021-11-25 20:47:59,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2021-11-25 20:47:59,455 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 25 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:47:59,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 503 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2021-11-25 20:47:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-25 20:47:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-11-25 20:47:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:47:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-11-25 20:47:59,472 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 74 [2021-11-25 20:47:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:47:59,472 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-11-25 20:47:59,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:47:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2021-11-25 20:47:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:47:59,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:47:59,474 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:47:59,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-25 20:47:59,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:47:59,690 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:47:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:47:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -178862730, now seen corresponding path program 1 times [2021-11-25 20:47:59,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:47:59,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453481357] [2021-11-25 20:47:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:47:59,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:47:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:47:59,693 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:47:59,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-25 20:47:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:47:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:47:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:48:02,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:02,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453481357] [2021-11-25 20:48:02,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453481357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:02,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:02,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-25 20:48:02,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109814428] [2021-11-25 20:48:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:02,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:48:02,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:48:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:48:02,454 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:02,700 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-11-25 20:48:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:48:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-11-25 20:48:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:02,702 INFO L225 Difference]: With dead ends: 109 [2021-11-25 20:48:02,702 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 20:48:02,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:48:02,702 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 21 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:02,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 693 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 221 Unchecked, 0.1s Time] [2021-11-25 20:48:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 20:48:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2021-11-25 20:48:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 63 states have internal predecessors, (70), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:48:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-25 20:48:02,713 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 74 [2021-11-25 20:48:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:02,713 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-25 20:48:02,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-25 20:48:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:48:02,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:48:02,715 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:48:02,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-25 20:48:02,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:02,928 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:48:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:48:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1281033670, now seen corresponding path program 1 times [2021-11-25 20:48:02,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:48:02,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337808899] [2021-11-25 20:48:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:48:02,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:48:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:48:02,929 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:48:02,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 20:48:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:48:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 20:48:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:48:05,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:05,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337808899] [2021-11-25 20:48:05,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337808899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:05,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:05,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-25 20:48:05,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238489989] [2021-11-25 20:48:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:48:05,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:48:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:48:05,586 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:12,218 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-11-25 20:48:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:48:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2021-11-25 20:48:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:12,221 INFO L225 Difference]: With dead ends: 108 [2021-11-25 20:48:12,221 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 20:48:12,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:48:12,222 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 51 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:12,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 619 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 41 Unchecked, 3.7s Time] [2021-11-25 20:48:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 20:48:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2021-11-25 20:48:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:48:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-11-25 20:48:12,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 74 [2021-11-25 20:48:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:12,234 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-11-25 20:48:12,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-11-25 20:48:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:48:12,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:48:12,235 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:48:12,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-25 20:48:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:12,451 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:48:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:48:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash -301196763, now seen corresponding path program 1 times [2021-11-25 20:48:12,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:48:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917341631] [2021-11-25 20:48:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:48:12,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:48:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:48:12,454 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:48:12,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-25 20:48:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:48:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:48:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:48:13,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:13,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917341631] [2021-11-25 20:48:13,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917341631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:13,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:13,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:48:13,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104455879] [2021-11-25 20:48:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:13,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:48:13,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:48:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:48:13,377 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:13,896 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-11-25 20:48:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:48:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-11-25 20:48:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:13,898 INFO L225 Difference]: With dead ends: 97 [2021-11-25 20:48:13,898 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 20:48:13,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:48:13,899 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:13,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 500 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-11-25 20:48:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 20:48:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-25 20:48:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.1) internal successors, (77), 71 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:48:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-11-25 20:48:13,912 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 75 [2021-11-25 20:48:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:13,913 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-11-25 20:48:13,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-11-25 20:48:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:48:13,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:48:13,914 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:48:13,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-25 20:48:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:14,115 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:48:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:48:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -43031325, now seen corresponding path program 1 times [2021-11-25 20:48:14,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:48:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170156921] [2021-11-25 20:48:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:48:14,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:48:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:48:14,118 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:48:14,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-25 20:48:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:48:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:48:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:48:15,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:15,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:15,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170156921] [2021-11-25 20:48:15,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170156921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:15,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:15,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:48:15,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367716563] [2021-11-25 20:48:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:15,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:48:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:48:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:48:15,665 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:16,948 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-25 20:48:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:48:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-11-25 20:48:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:16,949 INFO L225 Difference]: With dead ends: 97 [2021-11-25 20:48:16,950 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 20:48:16,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:48:16,951 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 35 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:16,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 522 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 85 Unchecked, 0.7s Time] [2021-11-25 20:48:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 20:48:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 20:48:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:48:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-25 20:48:16,961 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 75 [2021-11-25 20:48:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:16,961 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-25 20:48:16,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-25 20:48:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:48:16,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:48:16,962 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:48:16,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-25 20:48:17,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:17,163 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:48:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:48:17,163 INFO L85 PathProgramCache]: Analyzing trace with hash -695563549, now seen corresponding path program 1 times [2021-11-25 20:48:17,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:48:17,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201525717] [2021-11-25 20:48:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:48:17,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:48:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:48:17,165 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:48:17,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 20:48:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:48:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:48:17,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:48:20,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:20,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201525717] [2021-11-25 20:48:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201525717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:20,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:20,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-25 20:48:20,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563278844] [2021-11-25 20:48:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:48:20,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:48:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:48:20,431 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:23,017 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-11-25 20:48:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:48:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-11-25 20:48:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:23,019 INFO L225 Difference]: With dead ends: 77 [2021-11-25 20:48:23,020 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 20:48:23,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:48:23,021 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:23,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 472 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2021-11-25 20:48:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 20:48:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 20:48:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 57 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:48:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-11-25 20:48:23,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 75 [2021-11-25 20:48:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-11-25 20:48:23,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-11-25 20:48:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:48:23,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:48:23,034 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:48:23,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-25 20:48:23,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:23,251 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:48:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:48:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -437398111, now seen corresponding path program 1 times [2021-11-25 20:48:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:48:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147007548] [2021-11-25 20:48:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:48:23,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:48:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:48:23,253 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:48:23,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-25 20:48:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:48:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:48:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:48:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:48:23,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:48:23,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:48:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147007548] [2021-11-25 20:48:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147007548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:48:23,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:48:23,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:48:23,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350728203] [2021-11-25 20:48:23,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:48:23,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:48:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:48:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:48:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:48:23,915 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:48:24,204 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-25 20:48:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:48:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2021-11-25 20:48:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:48:24,205 INFO L225 Difference]: With dead ends: 69 [2021-11-25 20:48:24,205 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 20:48:24,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:48:24,206 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:48:24,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 293 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-25 20:48:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 20:48:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 20:48:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:48:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 20:48:24,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-11-25 20:48:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:48:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 20:48:24,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 20:48:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 20:48:24,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 20:48:24,210 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 20:48:24,211 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 20:48:24,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-25 20:48:24,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97474f30-03af-4596-b8ce-e3624cc6f212/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:48:24,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.