./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f68b319d77fa756392ca29e618a1e0accd9b6c9e ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f68b319d77fa756392ca29e618a1e0accd9b6c9e ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:42:50,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:42:50,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:42:50,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:42:50,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:42:50,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:42:50,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:42:50,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:42:50,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:42:50,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:42:50,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:42:50,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:42:50,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:42:50,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:42:50,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:42:50,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:42:50,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:42:50,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:42:50,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:42:50,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:42:50,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:42:50,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:42:50,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:42:50,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:42:50,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:42:50,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:42:50,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:42:50,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:42:50,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:42:50,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:42:50,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:42:50,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:42:50,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:42:50,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:42:50,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:42:50,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:42:50,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:42:50,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:42:50,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:42:50,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:42:50,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:42:50,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 20:42:50,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:42:50,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:42:50,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:42:50,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:42:50,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:42:50,463 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:42:50,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:42:50,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:42:50,463 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:42:50,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:42:50,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:42:50,464 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:42:50,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:42:50,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:42:50,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:42:50,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:42:50,466 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-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2020-12-09 20:42:50,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:42:50,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:42:50,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:42:50,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:42:50,649 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:42:50,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-12-09 20:42:50,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/7214c50b6/43a3b143c10f4975a98c1b5198bc44ad/FLAGf9f4d92e3 [2020-12-09 20:42:51,096 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:42:51,096 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-12-09 20:42:51,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/7214c50b6/43a3b143c10f4975a98c1b5198bc44ad/FLAGf9f4d92e3 [2020-12-09 20:42:51,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/7214c50b6/43a3b143c10f4975a98c1b5198bc44ad [2020-12-09 20:42:51,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:42:51,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:42:51,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:42:51,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:42:51,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:42:51,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167242af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51, skipping insertion in model container [2020-12-09 20:42:51,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:42:51,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:42:51,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:42:51,364 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:42:51,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:42:51,426 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:42:51,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51 WrapperNode [2020-12-09 20:42:51,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:42:51,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:42:51,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:42:51,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:42:51,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:42:51,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:42:51,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:42:51,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:42:51,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... [2020-12-09 20:42:51,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:42:51,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:42:51,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:42:51,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:42:51,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:42:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 20:42:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:42:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:42:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:42:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:42:51,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:42:51,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:42:51,928 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 20:42:51,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:42:51 BoogieIcfgContainer [2020-12-09 20:42:51,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:42:51,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:42:51,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:42:51,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:42:51,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:42:51" (1/3) ... [2020-12-09 20:42:51,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254f059d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:42:51, skipping insertion in model container [2020-12-09 20:42:51,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:42:51" (2/3) ... [2020-12-09 20:42:51,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254f059d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:42:51, skipping insertion in model container [2020-12-09 20:42:51,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:42:51" (3/3) ... [2020-12-09 20:42:51,937 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2020-12-09 20:42:51,947 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:42:51,950 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-09 20:42:51,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-09 20:42:51,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:42:51,983 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:42:51,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:42:51,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:42:51,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:42:51,984 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:42:51,984 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:42:51,984 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:42:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-12-09 20:42:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 20:42:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:51,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 20:42:51,999 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash 142005, now seen corresponding path program 1 times [2020-12-09 20:42:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140423067] [2020-12-09 20:42:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140423067] [2020-12-09 20:42:52,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:52,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:42:52,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463864283] [2020-12-09 20:42:52,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:42:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:52,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:42:52,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,140 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-12-09 20:42:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:52,178 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-09 20:42:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:42:52,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 20:42:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:52,184 INFO L225 Difference]: With dead ends: 34 [2020-12-09 20:42:52,185 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 20:42:52,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 20:42:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 20:42:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 20:42:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-09 20:42:52,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 3 [2020-12-09 20:42:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:52,207 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-09 20:42:52,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:42:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-09 20:42:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 20:42:52,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:52,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 20:42:52,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:42:52,208 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 142006, now seen corresponding path program 1 times [2020-12-09 20:42:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551079896] [2020-12-09 20:42:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551079896] [2020-12-09 20:42:52,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:52,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:42:52,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453153880] [2020-12-09 20:42:52,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:42:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:42:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:42:52,260 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2020-12-09 20:42:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:52,337 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-09 20:42:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:42:52,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 20:42:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:52,338 INFO L225 Difference]: With dead ends: 64 [2020-12-09 20:42:52,339 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 20:42:52,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 20:42:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2020-12-09 20:42:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 20:42:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-09 20:42:52,345 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 3 [2020-12-09 20:42:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:52,345 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-09 20:42:52,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:42:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-09 20:42:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:42:52,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:52,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:42:52,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:42:52,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash 4488543, now seen corresponding path program 1 times [2020-12-09 20:42:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985599562] [2020-12-09 20:42:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985599562] [2020-12-09 20:42:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:42:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576396187] [2020-12-09 20:42:52,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:42:52,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:42:52,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,400 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 3 states. [2020-12-09 20:42:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:52,427 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 20:42:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:42:52,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 20:42:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:52,428 INFO L225 Difference]: With dead ends: 34 [2020-12-09 20:42:52,428 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 20:42:52,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 20:42:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 20:42:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 20:42:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-09 20:42:52,432 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 4 [2020-12-09 20:42:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:52,433 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-09 20:42:52,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:42:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-09 20:42:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:42:52,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:52,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:42:52,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:42:52,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,435 INFO L82 PathProgramCache]: Analyzing trace with hash 4486301, now seen corresponding path program 1 times [2020-12-09 20:42:52,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236027849] [2020-12-09 20:42:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236027849] [2020-12-09 20:42:52,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:52,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:42:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922795945] [2020-12-09 20:42:52,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:42:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:52,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:42:52,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,463 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 3 states. [2020-12-09 20:42:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:52,484 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 20:42:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:42:52,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 20:42:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:52,485 INFO L225 Difference]: With dead ends: 32 [2020-12-09 20:42:52,485 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 20:42:52,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 20:42:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 20:42:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 20:42:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-09 20:42:52,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 4 [2020-12-09 20:42:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:52,488 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-09 20:42:52,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:42:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-09 20:42:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:42:52,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:52,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:42:52,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:42:52,489 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash 4486302, now seen corresponding path program 1 times [2020-12-09 20:42:52,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839196019] [2020-12-09 20:42:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839196019] [2020-12-09 20:42:52,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:52,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:42:52,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012058223] [2020-12-09 20:42:52,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:42:52,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:42:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:52,529 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-12-09 20:42:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:52,591 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-12-09 20:42:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:42:52,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 20:42:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:52,592 INFO L225 Difference]: With dead ends: 57 [2020-12-09 20:42:52,592 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 20:42:52,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:42:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 20:42:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-09 20:42:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 20:42:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 20:42:52,595 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 4 [2020-12-09 20:42:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:52,595 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 20:42:52,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:42:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 20:42:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:42:52,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:52,596 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 20:42:52,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:42:52,596 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash 136543463, now seen corresponding path program 1 times [2020-12-09 20:42:52,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:52,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632576804] [2020-12-09 20:42:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632576804] [2020-12-09 20:42:52,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576789568] [2020-12-09 20:42:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:42:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:42:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:42:52,721 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_42|], 1=[|ULTIMATE.start_main_old_#valid|]} [2020-12-09 20:42:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:42:52,732 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:42:52,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:42:52,741 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:42:52,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:42:52,751 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:42:52,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:42:52,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:42:52,764 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-09 20:42:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:42:52,828 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 20:42:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:52,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360215005] [2020-12-09 20:42:52,881 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 20:42:52,881 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:42:52,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:42:52,890 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:42:52,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:42:53,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:42:53,219 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:42:53,488 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:42:53,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:42:53,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-12-09 20:42:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031860899] [2020-12-09 20:42:53,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:42:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:42:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-09 20:42:53,489 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-12-09 20:42:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:53,658 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-12-09 20:42:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:42:53,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-12-09 20:42:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:53,660 INFO L225 Difference]: With dead ends: 90 [2020-12-09 20:42:53,660 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 20:42:53,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-09 20:42:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 20:42:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 31. [2020-12-09 20:42:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 20:42:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 20:42:53,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-12-09 20:42:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:53,665 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 20:42:53,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:42:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 20:42:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:42:53,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:53,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:42:53,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 20:42:53,868 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash 139144827, now seen corresponding path program 1 times [2020-12-09 20:42:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437092948] [2020-12-09 20:42:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437092948] [2020-12-09 20:42:54,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:54,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:42:54,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276091266] [2020-12-09 20:42:54,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:42:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:42:54,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:54,005 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-09 20:42:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:54,040 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 20:42:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:42:54,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 20:42:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:54,041 INFO L225 Difference]: With dead ends: 30 [2020-12-09 20:42:54,041 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 20:42:54,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:42:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 20:42:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 20:42:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 20:42:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-09 20:42:54,044 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 5 [2020-12-09 20:42:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:54,044 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-09 20:42:54,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:42:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-09 20:42:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:42:54,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:54,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:42:54,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-09 20:42:54,045 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash 18524017, now seen corresponding path program 1 times [2020-12-09 20:42:54,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:54,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810273506] [2020-12-09 20:42:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:54,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810273506] [2020-12-09 20:42:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:54,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:42:54,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220477900] [2020-12-09 20:42:54,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:42:54,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:42:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:54,076 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-12-09 20:42:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:54,120 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-09 20:42:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:42:54,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 20:42:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:54,121 INFO L225 Difference]: With dead ends: 44 [2020-12-09 20:42:54,121 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 20:42:54,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:42:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 20:42:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-12-09 20:42:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 20:42:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-12-09 20:42:54,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 6 [2020-12-09 20:42:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:54,124 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-12-09 20:42:54,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:42:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-12-09 20:42:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:42:54,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:54,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:42:54,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-09 20:42:54,125 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 18524016, now seen corresponding path program 1 times [2020-12-09 20:42:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:54,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762837536] [2020-12-09 20:42:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762837536] [2020-12-09 20:42:54,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:42:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981354655] [2020-12-09 20:42:54,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:42:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:42:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:42:54,146 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2020-12-09 20:42:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:54,171 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-12-09 20:42:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:42:54,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 20:42:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:54,172 INFO L225 Difference]: With dead ends: 32 [2020-12-09 20:42:54,172 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 20:42:54,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 20:42:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 20:42:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 20:42:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-09 20:42:54,174 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 6 [2020-12-09 20:42:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:54,174 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-09 20:42:54,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:42:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-09 20:42:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:42:54,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:54,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-12-09 20:42:54,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-09 20:42:54,175 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash 16430784, now seen corresponding path program 1 times [2020-12-09 20:42:54,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:54,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959566078] [2020-12-09 20:42:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959566078] [2020-12-09 20:42:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857581600] [2020-12-09 20:42:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:42:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 20:42:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:42:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:54,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:42:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:54,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031255464] [2020-12-09 20:42:54,355 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 20:42:54,355 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:42:54,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:42:54,355 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:42:54,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:42:54,699 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:42:54,824 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 20:42:55,158 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2020-12-09 20:42:55,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:42:55,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:42:55,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-12-09 20:42:55,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222121226] [2020-12-09 20:42:55,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 20:42:55,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 20:42:55,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-09 20:42:55,245 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-12-09 20:42:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,378 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-09 20:42:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 20:42:55,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-12-09 20:42:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,379 INFO L225 Difference]: With dead ends: 80 [2020-12-09 20:42:55,379 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 20:42:55,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-09 20:42:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 20:42:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 29. [2020-12-09 20:42:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 20:42:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-09 20:42:55,381 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 6 [2020-12-09 20:42:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,381 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-09 20:42:55,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 20:42:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-09 20:42:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:42:55,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-09 20:42:55,584 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash 574245710, now seen corresponding path program 1 times [2020-12-09 20:42:55,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000672688] [2020-12-09 20:42:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:55,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000672688] [2020-12-09 20:42:55,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:55,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:42:55,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103229629] [2020-12-09 20:42:55,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:42:55,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:42:55,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:42:55,639 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-12-09 20:42:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,663 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-09 20:42:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:42:55,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:42:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,664 INFO L225 Difference]: With dead ends: 28 [2020-12-09 20:42:55,664 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 20:42:55,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 20:42:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 20:42:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:42:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 20:42:55,666 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2020-12-09 20:42:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,666 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 20:42:55,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:42:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 20:42:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:42:55,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-12-09 20:42:55,667 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 574245711, now seen corresponding path program 1 times [2020-12-09 20:42:55,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559297016] [2020-12-09 20:42:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559297016] [2020-12-09 20:42:55,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:55,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:42:55,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042734200] [2020-12-09 20:42:55,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:42:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:42:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:55,704 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-12-09 20:42:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,745 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-09 20:42:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:42:55,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 20:42:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,746 INFO L225 Difference]: With dead ends: 28 [2020-12-09 20:42:55,746 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 20:42:55,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:42:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 20:42:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 20:42:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:42:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 20:42:55,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2020-12-09 20:42:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,748 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 20:42:55,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:42:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 20:42:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:42:55,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-12-09 20:42:55,749 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2094314799, now seen corresponding path program 1 times [2020-12-09 20:42:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142139540] [2020-12-09 20:42:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:55,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142139540] [2020-12-09 20:42:55,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:55,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:42:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112698109] [2020-12-09 20:42:55,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:42:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:42:55,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:55,769 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-09 20:42:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,800 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-09 20:42:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:42:55,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 20:42:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,801 INFO L225 Difference]: With dead ends: 27 [2020-12-09 20:42:55,801 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:42:55,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:42:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:42:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 20:42:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:42:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 20:42:55,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2020-12-09 20:42:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,803 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 20:42:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:42:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 20:42:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:42:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-12-09 20:42:55,804 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2094314800, now seen corresponding path program 1 times [2020-12-09 20:42:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167754613] [2020-12-09 20:42:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:55,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167754613] [2020-12-09 20:42:55,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:55,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:42:55,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719452166] [2020-12-09 20:42:55,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:42:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:42:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:42:55,841 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-12-09 20:42:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,888 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-12-09 20:42:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:42:55,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 20:42:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,889 INFO L225 Difference]: With dead ends: 35 [2020-12-09 20:42:55,889 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 20:42:55,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:42:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 20:42:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-09 20:42:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:42:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 20:42:55,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2020-12-09 20:42:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,891 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 20:42:55,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:42:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 20:42:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:42:55,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-12-09 20:42:55,892 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash 499248334, now seen corresponding path program 1 times [2020-12-09 20:42:55,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155037724] [2020-12-09 20:42:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:55,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155037724] [2020-12-09 20:42:55,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:55,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:42:55,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234422286] [2020-12-09 20:42:55,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:42:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:42:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:42:55,918 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-09 20:42:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:55,954 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-09 20:42:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:42:55,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 20:42:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:55,955 INFO L225 Difference]: With dead ends: 27 [2020-12-09 20:42:55,955 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:42:55,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:42:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:42:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 20:42:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:42:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 20:42:55,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2020-12-09 20:42:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:55,957 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 20:42:55,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:42:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 20:42:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:42:55,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:55,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:55,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-12-09 20:42:55,957 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash 499248335, now seen corresponding path program 1 times [2020-12-09 20:42:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:55,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314125037] [2020-12-09 20:42:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:56,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314125037] [2020-12-09 20:42:56,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:42:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247293668] [2020-12-09 20:42:56,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:42:56,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:42:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:42:56,005 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-12-09 20:42:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:56,083 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 20:42:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:42:56,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 20:42:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:56,083 INFO L225 Difference]: With dead ends: 34 [2020-12-09 20:42:56,083 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 20:42:56,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:42:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 20:42:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-09 20:42:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:42:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 20:42:56,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2020-12-09 20:42:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:56,085 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 20:42:56,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:42:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 20:42:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:42:56,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:56,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:56,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-12-09 20:42:56,086 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:56,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1703138371, now seen corresponding path program 1 times [2020-12-09 20:42:56,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:56,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297474460] [2020-12-09 20:42:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297474460] [2020-12-09 20:42:56,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:56,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 20:42:56,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094269601] [2020-12-09 20:42:56,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 20:42:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 20:42:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:42:56,174 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-12-09 20:42:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:56,284 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-09 20:42:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 20:42:56,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 20:42:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:56,285 INFO L225 Difference]: With dead ends: 47 [2020-12-09 20:42:56,285 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 20:42:56,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-09 20:42:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 20:42:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-12-09 20:42:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 20:42:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-09 20:42:56,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 11 [2020-12-09 20:42:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:56,288 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-09 20:42:56,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 20:42:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-09 20:42:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:42:56,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:56,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:56,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-12-09 20:42:56,289 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1258669792, now seen corresponding path program 1 times [2020-12-09 20:42:56,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:56,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034541119] [2020-12-09 20:42:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034541119] [2020-12-09 20:42:56,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:56,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 20:42:56,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583994758] [2020-12-09 20:42:56,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:42:56,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:56,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:42:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:42:56,518 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 9 states. [2020-12-09 20:42:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:56,840 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-09 20:42:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 20:42:56,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-09 20:42:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:56,841 INFO L225 Difference]: With dead ends: 56 [2020-12-09 20:42:56,841 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 20:42:56,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-12-09 20:42:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 20:42:56,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-12-09 20:42:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 20:42:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-09 20:42:56,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 12 [2020-12-09 20:42:56,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:56,843 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-09 20:42:56,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:42:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-09 20:42:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:42:56,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:56,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:56,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-12-09 20:42:56,844 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1257682845, now seen corresponding path program 1 times [2020-12-09 20:42:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910263179] [2020-12-09 20:42:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:56,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910263179] [2020-12-09 20:42:56,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:42:56,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:42:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670443618] [2020-12-09 20:42:56,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:42:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:42:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:42:56,912 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 4 states. [2020-12-09 20:42:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:56,931 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-12-09 20:42:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:42:56,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 20:42:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:56,932 INFO L225 Difference]: With dead ends: 43 [2020-12-09 20:42:56,932 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 20:42:56,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:42:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 20:42:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 20:42:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 20:42:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-09 20:42:56,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2020-12-09 20:42:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:56,933 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-09 20:42:56,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:42:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-09 20:42:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 20:42:56,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:56,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:56,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-12-09 20:42:56,934 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1044692206, now seen corresponding path program 1 times [2020-12-09 20:42:56,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:56,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567991084] [2020-12-09 20:42:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567991084] [2020-12-09 20:42:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379695027] [2020-12-09 20:42:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:42:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 20:42:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:42:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:42:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:42:57,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363781565] [2020-12-09 20:42:57,181 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 20:42:57,181 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:42:57,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:42:57,181 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:42:57,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:42:57,526 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:42:58,120 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-12-09 20:42:58,323 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2020-12-09 20:42:58,578 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-12-09 20:42:58,812 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2020-12-09 20:42:59,076 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 20:42:59,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:42:59,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 6, 6] total 26 [2020-12-09 20:42:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302684097] [2020-12-09 20:42:59,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 20:42:59,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:42:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 20:42:59,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-12-09 20:42:59,078 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2020-12-09 20:42:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:42:59,159 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 20:42:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:42:59,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-12-09 20:42:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:42:59,160 INFO L225 Difference]: With dead ends: 33 [2020-12-09 20:42:59,160 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 20:42:59,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-12-09 20:42:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 20:42:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 20:42:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 20:42:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 20:42:59,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2020-12-09 20:42:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:42:59,162 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 20:42:59,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 20:42:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 20:42:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 20:42:59,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:42:59,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:42:59,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-09 20:42:59,364 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:42:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:42:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 778610764, now seen corresponding path program 1 times [2020-12-09 20:42:59,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:42:59,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201067914] [2020-12-09 20:42:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:42:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:42:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201067914] [2020-12-09 20:42:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73572514] [2020-12-09 20:42:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:42:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:42:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 20:42:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:42:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:42:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:42:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:42:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908306115] [2020-12-09 20:42:59,625 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 20:42:59,625 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:42:59,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:42:59,625 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:42:59,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:42:59,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:42:59,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:42:59,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:00,446 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:43:00,919 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-09 20:43:01,279 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 20:43:01,581 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-09 20:43:01,791 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 20:43:01,965 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-09 20:43:01,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:43:01,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:43:01,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2020-12-09 20:43:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758308852] [2020-12-09 20:43:01,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 20:43:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 20:43:01,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-12-09 20:43:01,967 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 18 states. [2020-12-09 20:43:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:02,139 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 20:43:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:43:02,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-12-09 20:43:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:02,140 INFO L225 Difference]: With dead ends: 33 [2020-12-09 20:43:02,140 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 20:43:02,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 20:43:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 20:43:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-09 20:43:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 20:43:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-09 20:43:02,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-12-09 20:43:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:02,142 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-09 20:43:02,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 20:43:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-09 20:43:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:43:02,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:02,142 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:02,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:02,344 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1632868908, now seen corresponding path program 1 times [2020-12-09 20:43:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:02,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987883350] [2020-12-09 20:43:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987883350] [2020-12-09 20:43:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073992119] [2020-12-09 20:43:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 20:43:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:02,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:02,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586398837] [2020-12-09 20:43:02,603 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 20:43:02,603 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:43:02,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:43:02,603 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:43:02,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:43:02,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:02,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:03,365 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:43:03,851 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-09 20:43:04,242 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 20:43:04,557 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-09 20:43:04,791 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 20:43:04,991 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-09 20:43:04,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:43:04,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:43:04,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2020-12-09 20:43:04,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740812756] [2020-12-09 20:43:04,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 20:43:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:04,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 20:43:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-12-09 20:43:04,993 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 18 states. [2020-12-09 20:43:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:05,171 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-09 20:43:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 20:43:05,171 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2020-12-09 20:43:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:05,172 INFO L225 Difference]: With dead ends: 29 [2020-12-09 20:43:05,172 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 20:43:05,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 20:43:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 20:43:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-09 20:43:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:43:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-09 20:43:05,173 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-12-09 20:43:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:05,174 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-09 20:43:05,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 20:43:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-09 20:43:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:05,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:05,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:05,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-12-09 20:43:05,375 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1523957131, now seen corresponding path program 1 times [2020-12-09 20:43:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562671925] [2020-12-09 20:43:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562671925] [2020-12-09 20:43:05,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33592390] [2020-12-09 20:43:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:05,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 20:43:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:05,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:05,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944720905] [2020-12-09 20:43:05,666 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 20:43:05,666 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:43:05,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:43:05,666 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:43:05,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:43:05,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:05,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:05,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:06,401 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:43:06,565 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-12-09 20:43:07,016 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-09 20:43:07,411 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 20:43:07,728 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-09 20:43:07,970 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 20:43:08,155 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-09 20:43:08,156 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:43:08,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:43:08,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2020-12-09 20:43:08,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534464154] [2020-12-09 20:43:08,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 20:43:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 20:43:08,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-12-09 20:43:08,157 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-12-09 20:43:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:08,382 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 20:43:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:43:08,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2020-12-09 20:43:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:08,382 INFO L225 Difference]: With dead ends: 33 [2020-12-09 20:43:08,382 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 20:43:08,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2020-12-09 20:43:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 20:43:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-09 20:43:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 20:43:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-09 20:43:08,384 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-12-09 20:43:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:08,384 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-09 20:43:08,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 20:43:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-09 20:43:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 20:43:08,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:08,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:08,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:08,587 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1968170, now seen corresponding path program 1 times [2020-12-09 20:43:08,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:08,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601780247] [2020-12-09 20:43:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:08,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601780247] [2020-12-09 20:43:08,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120143367] [2020-12-09 20:43:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-09 20:43:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:08,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:08,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035309958] [2020-12-09 20:43:08,867 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 20:43:08,868 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:43:08,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:43:08,868 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:43:08,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:43:08,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:09,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:09,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:09,605 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:43:10,064 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-09 20:43:10,464 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 20:43:10,753 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-09 20:43:10,973 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 20:43:11,157 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-09 20:43:11,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:43:11,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 8, 8] total 31 [2020-12-09 20:43:11,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957673842] [2020-12-09 20:43:11,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 20:43:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 20:43:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2020-12-09 20:43:11,233 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2020-12-09 20:43:11,577 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-12-09 20:43:11,753 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-09 20:43:12,078 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-12-09 20:43:12,442 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2020-12-09 20:43:12,628 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-12-09 20:43:12,813 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-09 20:43:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:12,827 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-09 20:43:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 20:43:12,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-12-09 20:43:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:12,828 INFO L225 Difference]: With dead ends: 25 [2020-12-09 20:43:12,828 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 20:43:12,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2020-12-09 20:43:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 20:43:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 20:43:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 20:43:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-09 20:43:12,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-12-09 20:43:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:12,829 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-09 20:43:12,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 20:43:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-09 20:43:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 20:43:12,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:12,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:13,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:13,032 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 61045698, now seen corresponding path program 2 times [2020-12-09 20:43:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:13,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301602288] [2020-12-09 20:43:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301602288] [2020-12-09 20:43:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871640309] [2020-12-09 20:43:13,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:13,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 20:43:13,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:43:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 20:43:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:13,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338987238] [2020-12-09 20:43:13,957 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 20:43:13,957 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:43:13,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:43:13,958 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:43:13,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:43:14,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:14,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:14,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:43:14,757 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:43:15,352 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-09 20:43:15,829 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-09 20:43:16,195 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-09 20:43:16,484 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-09 20:43:16,702 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-09 20:43:16,703 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:43:16,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:43:16,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2020-12-09 20:43:16,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733340690] [2020-12-09 20:43:16,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 20:43:16,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:16,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 20:43:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 20:43:16,705 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 29 states. [2020-12-09 20:43:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:17,285 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-09 20:43:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 20:43:17,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 20 [2020-12-09 20:43:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:17,286 INFO L225 Difference]: With dead ends: 41 [2020-12-09 20:43:17,286 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 20:43:17,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=287, Invalid=2163, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 20:43:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 20:43:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 20:43:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 20:43:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 20:43:17,287 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-12-09 20:43:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:17,287 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 20:43:17,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 20:43:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 20:43:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 20:43:17,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:17,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:17,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2020-12-09 20:43:17,490 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2080158129, now seen corresponding path program 3 times [2020-12-09 20:43:17,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:17,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87060108] [2020-12-09 20:43:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:43:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87060108] [2020-12-09 20:43:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095820905] [2020-12-09 20:43:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:17,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 20:43:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:43:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-09 20:43:17,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 20:43:17,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:20,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 20:43:20,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175669239] [2020-12-09 20:43:20,118 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 20:43:20,118 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:43:20,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:43:20,118 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:43:20,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:43:20,126 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60af84d8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 20:43:20,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-09 20:43:20,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-09 20:43:20,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771689184] [2020-12-09 20:43:20,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 20:43:20,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:43:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 20:43:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=639, Unknown=1, NotChecked=0, Total=702 [2020-12-09 20:43:20,128 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-09 20:43:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:43:20,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:20,331 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60af84d8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 20:43:20,338 INFO L168 Benchmark]: Toolchain (without parser) took 29214.89 ms. Allocated memory was 81.8 MB in the beginning and 148.9 MB in the end (delta: 67.1 MB). Free memory was 51.1 MB in the beginning and 62.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 57.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,339 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 40.8 MB in the beginning and 40.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:43:20,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.24 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 50.9 MB in the beginning and 69.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.98 ms. Allocated memory is still 102.8 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,342 INFO L168 Benchmark]: Boogie Preprocessor took 27.96 ms. Allocated memory is still 102.8 MB. Free memory was 68.0 MB in the beginning and 66.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,343 INFO L168 Benchmark]: RCFGBuilder took 436.96 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 33.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,344 INFO L168 Benchmark]: TraceAbstraction took 28404.18 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 33.0 MB in the beginning and 62.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:43:20,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 40.8 MB in the beginning and 40.8 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.24 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 50.9 MB in the beginning and 69.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.98 ms. Allocated memory is still 102.8 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.96 ms. Allocated memory is still 102.8 MB. Free memory was 68.0 MB in the beginning and 66.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 436.96 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 33.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28404.18 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 33.0 MB in the beginning and 62.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60af84d8 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@60af84d8: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:43:21,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:43:21,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:43:21,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:43:21,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:43:21,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:43:21,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:43:21,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:43:21,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:43:21,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:43:21,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:43:21,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:43:21,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:43:21,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:43:21,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:43:21,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:43:21,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:43:21,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:43:21,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:43:21,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:43:21,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:43:21,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:43:21,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:43:21,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:43:21,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:43:21,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:43:21,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:43:21,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:43:21,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:43:21,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:43:21,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:43:21,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:43:21,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:43:21,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:43:21,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:43:21,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:43:21,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:43:21,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:43:21,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:43:21,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:43:21,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:43:21,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 20:43:21,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:43:21,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:43:21,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:43:21,948 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:43:21,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:43:21,948 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:43:21,948 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:43:21,948 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:43:21,948 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:43:21,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:43:21,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:43:21,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:43:21,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:43:21,950 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:43:21,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:43:21,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:43:21,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 20:43:21,952 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 20:43:21,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:43:21,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:43:21,953 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-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2020-12-09 20:43:22,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:43:22,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:43:22,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:43:22,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:43:22,193 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:43:22,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-12-09 20:43:22,235 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/825de13fb/f5336c10685c4e8ebc8597a633fdace8/FLAGc9614edf3 [2020-12-09 20:43:22,643 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:43:22,643 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2020-12-09 20:43:22,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/825de13fb/f5336c10685c4e8ebc8597a633fdace8/FLAGc9614edf3 [2020-12-09 20:43:22,663 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/data/825de13fb/f5336c10685c4e8ebc8597a633fdace8 [2020-12-09 20:43:22,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:43:22,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:43:22,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:43:22,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:43:22,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:43:22,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:43:22" (1/1) ... [2020-12-09 20:43:22,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c1746c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:22, skipping insertion in model container [2020-12-09 20:43:22,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:43:22" (1/1) ... [2020-12-09 20:43:22,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:43:22,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:43:22,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:43:22,927 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:43:22,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:43:23,015 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:43:23,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23 WrapperNode [2020-12-09 20:43:23,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:43:23,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:43:23,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:43:23,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:43:23,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:43:23,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:43:23,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:43:23,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:43:23,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... [2020-12-09 20:43:23,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:43:23,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:43:23,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:43:23,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:43:23,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:43:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-12-09 20:43:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:43:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-12-09 20:43:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:43:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:43:23,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:43:23,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:43:23,453 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 20:43:23,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:43:23 BoogieIcfgContainer [2020-12-09 20:43:23,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:43:23,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:43:23,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:43:23,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:43:23,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:43:22" (1/3) ... [2020-12-09 20:43:23,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58311e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:43:23, skipping insertion in model container [2020-12-09 20:43:23,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:43:23" (2/3) ... [2020-12-09 20:43:23,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58311e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:43:23, skipping insertion in model container [2020-12-09 20:43:23,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:43:23" (3/3) ... [2020-12-09 20:43:23,460 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2020-12-09 20:43:23,469 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:43:23,471 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-09 20:43:23,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-09 20:43:23,492 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:43:23,492 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:43:23,492 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:43:23,492 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:43:23,492 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:43:23,493 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:43:23,493 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:43:23,493 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:43:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-09 20:43:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:43:23,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:23,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:23,507 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-09 20:43:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:23,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593812226] [2020-12-09 20:43:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:23,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:43:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:23,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:23,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593812226] [2020-12-09 20:43:23,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:23,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:23,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982906718] [2020-12-09 20:43:23,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:23,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:23,659 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-12-09 20:43:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:23,716 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-12-09 20:43:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:23,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:43:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:23,724 INFO L225 Difference]: With dead ends: 92 [2020-12-09 20:43:23,725 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 20:43:23,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 20:43:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2020-12-09 20:43:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 20:43:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-09 20:43:23,752 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2020-12-09 20:43:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:23,753 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-09 20:43:23,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-09 20:43:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:43:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:23,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:23,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 20:43:23,954 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-09 20:43:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:23,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478586737] [2020-12-09 20:43:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:43:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:24,037 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 20:43:24,038 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:24,040 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:24,044 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:24,047 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:24,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-09 20:43:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:24,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478586737] [2020-12-09 20:43:24,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:24,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:43:24,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365106388] [2020-12-09 20:43:24,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:43:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:43:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:43:24,062 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 3 states. [2020-12-09 20:43:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:24,137 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-12-09 20:43:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:43:24,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 20:43:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:24,138 INFO L225 Difference]: With dead ends: 49 [2020-12-09 20:43:24,138 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 20:43:24,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:43:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 20:43:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 20:43:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 20:43:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-12-09 20:43:24,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2020-12-09 20:43:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:24,143 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-12-09 20:43:24,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:43:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-12-09 20:43:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:43:24,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:24,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:24,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 20:43:24,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-09 20:43:24,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:24,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029123320] [2020-12-09 20:43:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:43:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:24,509 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_31|]} [2020-12-09 20:43:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:24,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:24,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:24,528 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:24,534 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:24,536 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:24,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:24,556 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:24,556 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2020-12-09 20:43:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:24,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029123320] [2020-12-09 20:43:24,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:24,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:43:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224797981] [2020-12-09 20:43:24,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:24,572 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 4 states. [2020-12-09 20:43:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:24,787 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-12-09 20:43:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:24,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:43:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:24,789 INFO L225 Difference]: With dead ends: 89 [2020-12-09 20:43:24,789 INFO L226 Difference]: Without dead ends: 89 [2020-12-09 20:43:24,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-09 20:43:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2020-12-09 20:43:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 20:43:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-09 20:43:24,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2020-12-09 20:43:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:24,795 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-09 20:43:24,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-09 20:43:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:43:24,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:24,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:25,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,001 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-09 20:43:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:25,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411800265] [2020-12-09 20:43:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 20:43:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:25,108 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_32|]} [2020-12-09 20:43:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:25,113 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:25,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:25,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:25,131 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:25,132 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:25,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:25,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:25,146 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-09 20:43:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:25,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:25,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411800265] [2020-12-09 20:43:25,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:25,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:43:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553402089] [2020-12-09 20:43:25,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:25,162 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 4 states. [2020-12-09 20:43:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:25,253 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-12-09 20:43:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:25,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 20:43:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:25,254 INFO L225 Difference]: With dead ends: 86 [2020-12-09 20:43:25,254 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 20:43:25,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 20:43:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-12-09 20:43:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 20:43:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-09 20:43:25,258 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 9 [2020-12-09 20:43:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:25,258 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-09 20:43:25,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-09 20:43:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:43:25,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:25,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:25,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,461 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-09 20:43:25,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:25,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458416963] [2020-12-09 20:43:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:25,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:43:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:25,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:25,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458416963] [2020-12-09 20:43:25,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:25,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:25,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843198711] [2020-12-09 20:43:25,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:25,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:25,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:25,591 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2020-12-09 20:43:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:25,638 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-12-09 20:43:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:25,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 20:43:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:25,639 INFO L225 Difference]: With dead ends: 101 [2020-12-09 20:43:25,640 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 20:43:25,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 20:43:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2020-12-09 20:43:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 20:43:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-12-09 20:43:25,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 9 [2020-12-09 20:43:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:25,644 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-12-09 20:43:25,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-12-09 20:43:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:43:25,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:25,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:25,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:25,848 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-09 20:43:25,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:25,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363294058] [2020-12-09 20:43:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:43:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:25,945 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 20:43:25,945 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:25,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:25,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:25,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:25,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:15 [2020-12-09 20:43:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:25,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:25,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363294058] [2020-12-09 20:43:25,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:25,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:43:25,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510079598] [2020-12-09 20:43:25,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:43:25,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:25,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:43:25,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:43:25,969 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 3 states. [2020-12-09 20:43:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:26,034 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-12-09 20:43:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:43:26,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 20:43:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:26,035 INFO L225 Difference]: With dead ends: 68 [2020-12-09 20:43:26,035 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 20:43:26,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:43:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 20:43:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-09 20:43:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-09 20:43:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-12-09 20:43:26,039 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 9 [2020-12-09 20:43:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:26,039 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-12-09 20:43:26,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:43:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-12-09 20:43:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:43:26,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:26,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:26,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 20:43:26,241 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:26,243 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-09 20:43:26,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:26,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930332048] [2020-12-09 20:43:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 20:43:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:26,316 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:26,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:26,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:26,353 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:26,355 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:26,356 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-12-09 20:43:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:26,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:26,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930332048] [2020-12-09 20:43:26,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:26,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682002964] [2020-12-09 20:43:26,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:43:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:26,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:43:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:26,387 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 5 states. [2020-12-09 20:43:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:26,601 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-12-09 20:43:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:26,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 20:43:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:26,602 INFO L225 Difference]: With dead ends: 105 [2020-12-09 20:43:26,602 INFO L226 Difference]: Without dead ends: 105 [2020-12-09 20:43:26,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-09 20:43:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2020-12-09 20:43:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-09 20:43:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-09 20:43:26,606 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2020-12-09 20:43:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:26,607 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-09 20:43:26,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:43:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-09 20:43:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:43:26,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:26,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:26,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 20:43:26,809 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2020-12-09 20:43:26,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:26,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951484892] [2020-12-09 20:43:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:26,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:43:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:26,881 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_34|]} [2020-12-09 20:43:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:26,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:26,886 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:26,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:26,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:26,907 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:26,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:26,924 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:26,924 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:26,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:26,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951484892] [2020-12-09 20:43:26,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:26,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:26,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656253834] [2020-12-09 20:43:26,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:43:26,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:43:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:26,963 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 5 states. [2020-12-09 20:43:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:27,248 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2020-12-09 20:43:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:27,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 20:43:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:27,250 INFO L225 Difference]: With dead ends: 113 [2020-12-09 20:43:27,250 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 20:43:27,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 20:43:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2020-12-09 20:43:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-09 20:43:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-09 20:43:27,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2020-12-09 20:43:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:27,254 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-09 20:43:27,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:43:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-09 20:43:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:43:27,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:27,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:27,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 20:43:27,457 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:27,458 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-09 20:43:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:27,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479362332] [2020-12-09 20:43:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:27,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:43:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:27,583 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:27,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:27,585 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:27,613 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-09 20:43:27,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:27,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-09 20:43:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:27,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:27,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479362332] [2020-12-09 20:43:27,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:27,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:43:27,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913803115] [2020-12-09 20:43:27,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:27,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:27,634 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 4 states. [2020-12-09 20:43:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:27,714 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-12-09 20:43:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:27,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 20:43:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:27,716 INFO L225 Difference]: With dead ends: 101 [2020-12-09 20:43:27,716 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 20:43:27,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 20:43:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2020-12-09 20:43:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 20:43:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2020-12-09 20:43:27,720 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 10 [2020-12-09 20:43:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:27,721 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2020-12-09 20:43:27,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2020-12-09 20:43:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:43:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:27,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:27,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 20:43:27,922 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2020-12-09 20:43:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:27,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037746085] [2020-12-09 20:43:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:43:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:27,983 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:27,983 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:27,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:28,012 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:28,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:28,014 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:43:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:28,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:28,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037746085] [2020-12-09 20:43:28,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:28,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:28,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312158418] [2020-12-09 20:43:28,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:28,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:28,070 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 6 states. [2020-12-09 20:43:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:28,347 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2020-12-09 20:43:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:43:28,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 20:43:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:28,348 INFO L225 Difference]: With dead ends: 106 [2020-12-09 20:43:28,348 INFO L226 Difference]: Without dead ends: 106 [2020-12-09 20:43:28,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-09 20:43:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 71. [2020-12-09 20:43:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 20:43:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-12-09 20:43:28,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 10 [2020-12-09 20:43:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:28,351 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-12-09 20:43:28,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-12-09 20:43:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:43:28,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:28,352 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:28,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 20:43:28,554 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-09 20:43:28,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:28,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031019531] [2020-12-09 20:43:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 20:43:28,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:28,622 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_35|]} [2020-12-09 20:43:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:28,628 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:28,629 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:28,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:28,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:28,651 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:28,666 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:28,668 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:28,668 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:28,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:29,227 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:29,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:29,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,232 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:29,232 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:1 [2020-12-09 20:43:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031019531] [2020-12-09 20:43:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742894306] [2020-12-09 20:43:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:43:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 20:43:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:29,304 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_37|]} [2020-12-09 20:43:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:29,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:29,309 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,327 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:29,329 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,343 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:29,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:29,878 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:29,883 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,884 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:29,884 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-12-09 20:43:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:29,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613731357] [2020-12-09 20:43:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 20:43:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:29,925 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_39|]} [2020-12-09 20:43:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:29,931 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:29,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:29,960 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:29,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:29,977 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:30,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:30,025 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:30,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:30,030 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:30,030 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:30,031 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:30,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-09 20:43:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:30,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:43:30,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 4] total 16 [2020-12-09 20:43:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905736793] [2020-12-09 20:43:30,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 20:43:30,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:30,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 20:43:30,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:43:30,034 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 17 states. [2020-12-09 20:43:30,644 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-09 20:43:30,902 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-12-09 20:43:31,458 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-12-09 20:43:32,009 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-12-09 20:43:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:32,536 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2020-12-09 20:43:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:43:32,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2020-12-09 20:43:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:32,538 INFO L225 Difference]: With dead ends: 231 [2020-12-09 20:43:32,538 INFO L226 Difference]: Without dead ends: 231 [2020-12-09 20:43:32,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-09 20:43:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-09 20:43:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 95. [2020-12-09 20:43:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-09 20:43:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-12-09 20:43:32,542 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 11 [2020-12-09 20:43:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:32,542 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-12-09 20:43:32,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 20:43:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-12-09 20:43:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:43:32,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:32,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:33,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt,12 mathsat -unsat_core_generation=3 [2020-12-09 20:43:33,146 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2020-12-09 20:43:33,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:33,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567189715] [2020-12-09 20:43:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:43:33,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:33,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:33,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567189715] [2020-12-09 20:43:33,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:33,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:33,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094427455] [2020-12-09 20:43:33,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:33,236 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 6 states. [2020-12-09 20:43:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:33,530 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2020-12-09 20:43:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:33,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 20:43:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:33,532 INFO L225 Difference]: With dead ends: 148 [2020-12-09 20:43:33,532 INFO L226 Difference]: Without dead ends: 148 [2020-12-09 20:43:33,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:43:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-09 20:43:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2020-12-09 20:43:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-09 20:43:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2020-12-09 20:43:33,535 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 12 [2020-12-09 20:43:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:33,535 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2020-12-09 20:43:33,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2020-12-09 20:43:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:43:33,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:33,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:33,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-09 20:43:33,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-12-09 20:43:33,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:33,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195770721] [2020-12-09 20:43:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:33,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 20:43:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:33,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:33,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195770721] [2020-12-09 20:43:33,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:33,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:43:33,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999013613] [2020-12-09 20:43:33,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:43:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:33,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:43:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:43:33,833 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand 4 states. [2020-12-09 20:43:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:34,010 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-12-09 20:43:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:43:34,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 20:43:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:34,013 INFO L225 Difference]: With dead ends: 110 [2020-12-09 20:43:34,013 INFO L226 Difference]: Without dead ends: 110 [2020-12-09 20:43:34,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-09 20:43:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-09 20:43:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-09 20:43:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2020-12-09 20:43:34,017 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 12 [2020-12-09 20:43:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:34,018 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2020-12-09 20:43:34,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:43:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2020-12-09 20:43:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:43:34,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:34,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:34,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-12-09 20:43:34,220 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash -857651139, now seen corresponding path program 1 times [2020-12-09 20:43:34,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:34,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772188928] [2020-12-09 20:43:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:43:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:34,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:34,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772188928] [2020-12-09 20:43:34,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:34,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:34,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777133400] [2020-12-09 20:43:34,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:34,357 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand 6 states. [2020-12-09 20:43:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:34,593 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2020-12-09 20:43:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:34,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 20:43:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:34,595 INFO L225 Difference]: With dead ends: 125 [2020-12-09 20:43:34,595 INFO L226 Difference]: Without dead ends: 125 [2020-12-09 20:43:34,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:43:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-09 20:43:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-12-09 20:43:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-09 20:43:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-12-09 20:43:34,597 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 12 [2020-12-09 20:43:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:34,598 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-12-09 20:43:34,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-12-09 20:43:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 20:43:34,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:34,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:34,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-12-09 20:43:34,799 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-09 20:43:34,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:34,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804648211] [2020-12-09 20:43:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:43:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:34,877 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:34,877 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:34,878 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:34,900 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:34,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:34,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:43:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:34,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804648211] [2020-12-09 20:43:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [275126079] [2020-12-09 20:43:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:43:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:43:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:35,453 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:35,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:35,454 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:35,481 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:35,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:35,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:43:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:35,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:35,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395547541] [2020-12-09 20:43:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 20:43:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:35,569 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:35,569 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:35,570 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:35,596 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:35,598 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:35,598 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:43:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:35,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:36,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:43:36,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 16 [2020-12-09 20:43:36,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439986355] [2020-12-09 20:43:36,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 20:43:36,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 20:43:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:43:36,350 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 17 states. [2020-12-09 20:43:37,187 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-12-09 20:43:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:37,710 INFO L93 Difference]: Finished difference Result 171 states and 203 transitions. [2020-12-09 20:43:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 20:43:37,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-09 20:43:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:37,712 INFO L225 Difference]: With dead ends: 171 [2020-12-09 20:43:37,712 INFO L226 Difference]: Without dead ends: 171 [2020-12-09 20:43:37,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-12-09 20:43:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-09 20:43:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 93. [2020-12-09 20:43:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-09 20:43:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-12-09 20:43:37,715 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 13 [2020-12-09 20:43:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:37,715 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-12-09 20:43:37,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 20:43:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-12-09 20:43:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:43:37,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:37,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:38,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,19 cvc4 --incremental --print-success --lang smt,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:38,318 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2020-12-09 20:43:38,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:38,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881725389] [2020-12-09 20:43:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:43:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:38,428 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 20:43:38,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:38,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:38,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:38,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:38,434 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:15 [2020-12-09 20:43:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:38,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881725389] [2020-12-09 20:43:38,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:38,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291673036] [2020-12-09 20:43:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:43:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:43:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:38,460 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 5 states. [2020-12-09 20:43:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:38,561 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-12-09 20:43:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:38,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 20:43:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:38,562 INFO L225 Difference]: With dead ends: 92 [2020-12-09 20:43:38,562 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 20:43:38,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 20:43:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-09 20:43:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-09 20:43:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-12-09 20:43:38,564 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 14 [2020-12-09 20:43:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:38,564 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-12-09 20:43:38,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:43:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-12-09 20:43:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:43:38,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:38,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:38,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-12-09 20:43:38,766 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:38,767 INFO L82 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2020-12-09 20:43:38,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:38,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922962891] [2020-12-09 20:43:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:38,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:43:38,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:38,933 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:38,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:38,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:38,954 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 20:43:38,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:38,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-09 20:43:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:38,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:38,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922962891] [2020-12-09 20:43:38,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:38,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135838844] [2020-12-09 20:43:38,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:38,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:38,984 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 6 states. [2020-12-09 20:43:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:39,185 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2020-12-09 20:43:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:43:39,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 20:43:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:39,187 INFO L225 Difference]: With dead ends: 123 [2020-12-09 20:43:39,187 INFO L226 Difference]: Without dead ends: 123 [2020-12-09 20:43:39,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:43:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-09 20:43:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2020-12-09 20:43:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 20:43:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2020-12-09 20:43:39,189 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 14 [2020-12-09 20:43:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:39,189 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2020-12-09 20:43:39,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2020-12-09 20:43:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:43:39,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:39,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:39,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-12-09 20:43:39,391 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash 873875554, now seen corresponding path program 1 times [2020-12-09 20:43:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:39,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329061529] [2020-12-09 20:43:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:43:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:39,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:39,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:39,502 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:39,528 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:39,529 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:39,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-12-09 20:43:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:39,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:39,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329061529] [2020-12-09 20:43:39,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:39,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122631851] [2020-12-09 20:43:39,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:39,562 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand 6 states. [2020-12-09 20:43:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:39,760 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2020-12-09 20:43:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:43:39,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 20:43:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:39,762 INFO L225 Difference]: With dead ends: 99 [2020-12-09 20:43:39,762 INFO L226 Difference]: Without dead ends: 99 [2020-12-09 20:43:39,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:43:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-09 20:43:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-12-09 20:43:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-09 20:43:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-09 20:43:39,764 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 14 [2020-12-09 20:43:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:39,765 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-09 20:43:39,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-09 20:43:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:43:39,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:39,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:39,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-12-09 20:43:39,967 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2020-12-09 20:43:39,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:39,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146265709] [2020-12-09 20:43:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 20:43:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:40,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:40,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146265709] [2020-12-09 20:43:40,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:40,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126794220] [2020-12-09 20:43:40,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:43:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:43:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:40,080 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 5 states. [2020-12-09 20:43:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:40,212 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-12-09 20:43:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:40,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 20:43:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:40,214 INFO L225 Difference]: With dead ends: 91 [2020-12-09 20:43:40,214 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 20:43:40,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 20:43:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-09 20:43:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-09 20:43:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-12-09 20:43:40,216 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 16 [2020-12-09 20:43:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:40,216 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-12-09 20:43:40,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:43:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-12-09 20:43:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:43:40,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:40,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:40,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 mathsat -unsat_core_generation=3 [2020-12-09 20:43:40,418 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2020-12-09 20:43:40,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:40,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952349885] [2020-12-09 20:43:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 20:43:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:40,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:40,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952349885] [2020-12-09 20:43:40,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:40,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 20:43:40,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014875789] [2020-12-09 20:43:40,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:43:40,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:43:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:40,563 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 7 states. [2020-12-09 20:43:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:40,882 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2020-12-09 20:43:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:43:40,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-09 20:43:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:40,884 INFO L225 Difference]: With dead ends: 135 [2020-12-09 20:43:40,884 INFO L226 Difference]: Without dead ends: 135 [2020-12-09 20:43:40,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-09 20:43:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-09 20:43:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-12-09 20:43:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-09 20:43:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2020-12-09 20:43:40,887 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 16 [2020-12-09 20:43:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:40,888 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2020-12-09 20:43:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:43:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2020-12-09 20:43:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:43:40,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:40,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:41,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 mathsat -unsat_core_generation=3 [2020-12-09 20:43:41,090 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1851473855, now seen corresponding path program 1 times [2020-12-09 20:43:41,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:41,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306813712] [2020-12-09 20:43:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 20:43:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:41,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:41,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306813712] [2020-12-09 20:43:41,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:41,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:43:41,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987903956] [2020-12-09 20:43:41,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:41,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:43:41,239 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 6 states. [2020-12-09 20:43:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:41,407 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-09 20:43:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:43:41,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 20:43:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:41,408 INFO L225 Difference]: With dead ends: 116 [2020-12-09 20:43:41,408 INFO L226 Difference]: Without dead ends: 116 [2020-12-09 20:43:41,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:43:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-09 20:43:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2020-12-09 20:43:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-09 20:43:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-09 20:43:41,410 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 16 [2020-12-09 20:43:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:41,410 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-09 20:43:41,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:43:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-09 20:43:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 20:43:41,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:41,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:41,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 mathsat -unsat_core_generation=3 [2020-12-09 20:43:41,612 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1532417320, now seen corresponding path program 1 times [2020-12-09 20:43:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:41,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38786477] [2020-12-09 20:43:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 20:43:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:41,716 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_42|], 1=[|v_#valid_45|]} [2020-12-09 20:43:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:41,721 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:41,722 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:41,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:41,740 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:41,741 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:41,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:41,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:41,755 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:41,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:42,513 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:43:42,515 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 20:43:42,519 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:42,522 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:43:42,525 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-12-09 20:43:42,526 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:42,531 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:42,532 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:42,532 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,532 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:83, output treesize:1 [2020-12-09 20:43:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:42,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38786477] [2020-12-09 20:43:42,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598304179] [2020-12-09 20:43:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:43:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:43:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:42,611 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_44|], 1=[|v_#valid_47|]} [2020-12-09 20:43:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:42,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:42,618 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:42,642 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:42,644 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,661 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:42,663 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:42,663 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:42,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:43,249 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 20:43:43,257 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:43:43,258 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 20:43:43,261 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:43,266 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,268 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:43:43,270 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-12-09 20:43:43,270 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:43,271 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:43,272 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,272 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:95, output treesize:1 [2020-12-09 20:43:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:43,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318288339] [2020-12-09 20:43:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:43:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:43:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:43,316 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_46|], 1=[|v_#valid_49|]} [2020-12-09 20:43:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:43,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:43,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:43,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:43:43,341 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,354 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:43,355 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,355 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:43:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:43:43,455 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:43:43,456 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 20:43:43,459 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:43:43,462 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:43:43,465 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-12-09 20:43:43,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:43:43,470 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:43,471 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:43:43,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:43,471 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:95, output treesize:1 [2020-12-09 20:43:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:43,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:43:43,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8, 8, 8] total 16 [2020-12-09 20:43:43,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399399885] [2020-12-09 20:43:43,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 20:43:43,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 20:43:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:43:43,476 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 17 states. [2020-12-09 20:43:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:44,147 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2020-12-09 20:43:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:43:44,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-12-09 20:43:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:44,148 INFO L225 Difference]: With dead ends: 188 [2020-12-09 20:43:44,148 INFO L226 Difference]: Without dead ends: 188 [2020-12-09 20:43:44,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2020-12-09 20:43:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-09 20:43:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 83. [2020-12-09 20:43:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 20:43:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-12-09 20:43:44,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 17 [2020-12-09 20:43:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:44,151 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-12-09 20:43:44,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 20:43:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-12-09 20:43:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:44,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 cvc4 --incremental --print-success --lang smt,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 mathsat -unsat_core_generation=3 [2020-12-09 20:43:44,754 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2020-12-09 20:43:44,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:44,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014868983] [2020-12-09 20:43:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 20:43:44,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:44,846 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-09 20:43:44,846 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:43:44,847 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:44,851 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:44,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:44,852 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:15 [2020-12-09 20:43:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:44,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014868983] [2020-12-09 20:43:44,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:44,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:44,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475479918] [2020-12-09 20:43:44,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:43:44,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:43:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:43:44,875 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 5 states. [2020-12-09 20:43:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:44,964 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-12-09 20:43:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:43:44,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 20:43:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:44,966 INFO L225 Difference]: With dead ends: 82 [2020-12-09 20:43:44,966 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 20:43:44,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 20:43:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-09 20:43:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-09 20:43:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-12-09 20:43:44,969 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 18 [2020-12-09 20:43:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:44,969 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-12-09 20:43:44,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:43:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-12-09 20:43:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:44,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:44,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:45,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 mathsat -unsat_core_generation=3 [2020-12-09 20:43:45,171 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2020-12-09 20:43:45,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:45,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854069007] [2020-12-09 20:43:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 20:43:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:45,363 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:45,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:45,365 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:45,383 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 20:43:45,384 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:45,384 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-09 20:43:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:45,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:45,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854069007] [2020-12-09 20:43:45,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:45,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 20:43:45,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705720604] [2020-12-09 20:43:45,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:43:45,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:43:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:43:45,437 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 7 states. [2020-12-09 20:43:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:45,751 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2020-12-09 20:43:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:43:45,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 20:43:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:45,752 INFO L225 Difference]: With dead ends: 123 [2020-12-09 20:43:45,752 INFO L226 Difference]: Without dead ends: 123 [2020-12-09 20:43:45,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:43:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-09 20:43:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-12-09 20:43:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-09 20:43:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-09 20:43:45,755 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 18 [2020-12-09 20:43:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:45,755 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-09 20:43:45,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:43:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-09 20:43:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:45,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:45,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:45,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 mathsat -unsat_core_generation=3 [2020-12-09 20:43:45,957 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2020-12-09 20:43:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:45,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95010877] [2020-12-09 20:43:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 20:43:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:46,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2020-12-09 20:43:46,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:46,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:46,078 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:46,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2020-12-09 20:43:46,193 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:46,194 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2020-12-09 20:43:46,195 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:43:46,196 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:43:46,196 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:46,207 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:46,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:46,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:13 [2020-12-09 20:43:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:46,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:46,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95010877] [2020-12-09 20:43:46,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:46,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-09 20:43:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72640242] [2020-12-09 20:43:46,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 20:43:46,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:46,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 20:43:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:43:46,237 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 11 states. [2020-12-09 20:43:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:46,697 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-12-09 20:43:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 20:43:46,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-09 20:43:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:46,698 INFO L225 Difference]: With dead ends: 99 [2020-12-09 20:43:46,698 INFO L226 Difference]: Without dead ends: 99 [2020-12-09 20:43:46,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-09 20:43:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-09 20:43:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-12-09 20:43:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-09 20:43:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-12-09 20:43:46,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 18 [2020-12-09 20:43:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:46,701 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-12-09 20:43:46,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 20:43:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-12-09 20:43:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:46,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:46,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:46,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 mathsat -unsat_core_generation=3 [2020-12-09 20:43:46,902 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 891070673, now seen corresponding path program 1 times [2020-12-09 20:43:46,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:46,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114810846] [2020-12-09 20:43:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:46,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 20:43:46,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:47,009 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:47,009 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:43:47,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:47,034 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:43:47,036 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:47,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-12-09 20:43:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:47,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114810846] [2020-12-09 20:43:47,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:47,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 20:43:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296007805] [2020-12-09 20:43:47,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 20:43:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 20:43:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:43:47,112 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 8 states. [2020-12-09 20:43:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:47,491 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-12-09 20:43:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 20:43:47,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-09 20:43:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:47,492 INFO L225 Difference]: With dead ends: 107 [2020-12-09 20:43:47,492 INFO L226 Difference]: Without dead ends: 107 [2020-12-09 20:43:47,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:43:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-09 20:43:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2020-12-09 20:43:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-09 20:43:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-12-09 20:43:47,494 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 18 [2020-12-09 20:43:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:47,494 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-12-09 20:43:47,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 20:43:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-12-09 20:43:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:43:47,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:47,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:47,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 mathsat -unsat_core_generation=3 [2020-12-09 20:43:47,696 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 891119440, now seen corresponding path program 1 times [2020-12-09 20:43:47,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:47,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295222247] [2020-12-09 20:43:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 20:43:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:47,829 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 20:43:47,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:47,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:47,846 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:47,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2020-12-09 20:43:48,065 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:43:48,089 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:48,090 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 45 [2020-12-09 20:43:48,091 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 20:43:48,091 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:43:48,093 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 20:43:48,093 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:43:48,094 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:48,147 INFO L625 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2020-12-09 20:43:48,151 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:43:48,152 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:13 [2020-12-09 20:43:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:48,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295222247] [2020-12-09 20:43:48,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:48,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-09 20:43:48,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953846104] [2020-12-09 20:43:48,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 20:43:48,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 20:43:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:43:48,191 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 13 states. [2020-12-09 20:43:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:49,088 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-12-09 20:43:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 20:43:49,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-12-09 20:43:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:49,089 INFO L225 Difference]: With dead ends: 113 [2020-12-09 20:43:49,089 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 20:43:49,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-12-09 20:43:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 20:43:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2020-12-09 20:43:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-09 20:43:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-12-09 20:43:49,092 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 18 [2020-12-09 20:43:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:49,092 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-12-09 20:43:49,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 20:43:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-12-09 20:43:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 20:43:49,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:49,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:43:49,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 mathsat -unsat_core_generation=3 [2020-12-09 20:43:49,294 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:43:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2020-12-09 20:43:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:43:49,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047765326] [2020-12-09 20:43:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2020-12-09 20:43:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 20:43:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:49,419 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 20:43:49,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:43:49,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:43:49,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:43:49,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 20:43:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:51,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:43:51,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047765326] [2020-12-09 20:43:51,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:43:51,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:43:51,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448667740] [2020-12-09 20:43:51,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:43:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:43:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:43:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2020-12-09 20:43:51,503 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 6 states. [2020-12-09 20:44:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:01,642 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-12-09 20:44:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:44:01,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-09 20:44:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:01,643 INFO L225 Difference]: With dead ends: 93 [2020-12-09 20:44:01,643 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 20:44:01,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2020-12-09 20:44:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 20:44:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 20:44:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 20:44:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-09 20:44:01,646 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 19 [2020-12-09 20:44:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:01,646 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-09 20:44:01,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:44:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-09 20:44:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 20:44:01,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:01,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:01,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 mathsat -unsat_core_generation=3 [2020-12-09 20:44:01,847 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1579563245, now seen corresponding path program 1 times [2020-12-09 20:44:01,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:01,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499870607] [2020-12-09 20:44:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 20:44:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:01,971 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:01,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:01,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:01,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:01,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-09 20:44:01,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2020-12-09 20:44:01,996 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:02,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:02,002 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:02,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-09 20:44:02,023 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-09 20:44:02,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:02,038 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:02,039 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:02,039 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:27 [2020-12-09 20:44:02,180 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2020-12-09 20:44:02,181 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:02,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:02,187 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:02,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:5 [2020-12-09 20:44:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:02,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:44:02,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499870607] [2020-12-09 20:44:02,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:02,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-09 20:44:02,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719629786] [2020-12-09 20:44:02,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:44:02,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:44:02,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:44:02,210 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 9 states. [2020-12-09 20:44:04,546 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-09 20:44:05,032 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-09 20:44:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:05,075 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-12-09 20:44:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 20:44:05,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-09 20:44:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:05,076 INFO L225 Difference]: With dead ends: 89 [2020-12-09 20:44:05,076 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 20:44:05,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-09 20:44:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 20:44:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-09 20:44:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 20:44:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-12-09 20:44:05,079 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 22 [2020-12-09 20:44:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:05,079 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-12-09 20:44:05,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:44:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-12-09 20:44:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 20:44:05,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:05,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:05,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 mathsat -unsat_core_generation=3 [2020-12-09 20:44:05,281 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash 761914795, now seen corresponding path program 1 times [2020-12-09 20:44:05,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:05,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127452988] [2020-12-09 20:44:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 37 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 20:44:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:05,516 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_50|], 1=[|v_#valid_56|]} [2020-12-09 20:44:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:05,521 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:44:05,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:05,540 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,552 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2020-12-09 20:44:05,582 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-09 20:44:05,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,599 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-09 20:44:05,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2020-12-09 20:44:05,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:05,657 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,658 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:05,659 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:40 [2020-12-09 20:44:05,841 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,841 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2020-12-09 20:44:05,842 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:05,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:05,844 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:05,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:05,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:05,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:05,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:25 [2020-12-09 20:44:05,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:05,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:06,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:06,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2020-12-09 20:44:06,750 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-09 20:44:06,753 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-09 20:44:06,756 INFO L625 ElimStorePlain]: treesize reduction 7, result has 30.0 percent of original size [2020-12-09 20:44:06,757 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:06,769 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2020-12-09 20:44:06,789 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-09 20:44:06,792 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2020-12-09 20:44:06,796 INFO L625 ElimStorePlain]: treesize reduction 7, result has 30.0 percent of original size [2020-12-09 20:44:06,796 INFO L547 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:06,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:06,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 20:44:06,820 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2020-12-09 20:44:06,929 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:44:06,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:06,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:06,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:44:06,944 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:06,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:06,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:06,951 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:24, output treesize:7 [2020-12-09 20:44:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:07,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127452988] [2020-12-09 20:44:07,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688248892] [2020-12-09 20:44:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 38 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 20:44:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:07,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:07,112 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:07,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:07,120 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:07,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-09 20:44:07,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 20:44:07,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:07,235 INFO L625 ElimStorePlain]: treesize reduction 8, result has 80.5 percent of original size [2020-12-09 20:44:07,236 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:07,236 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:33 [2020-12-09 20:44:07,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2020-12-09 20:44:07,326 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:07,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:07,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:07,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:40 [2020-12-09 20:44:13,426 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:13,426 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2020-12-09 20:44:13,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:13,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:13,429 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:13,447 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:13,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:13,448 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 20:44:13,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 20:44:13,450 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:13,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:26 [2020-12-09 20:44:13,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:13,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 20:44:13,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 20:44:13,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 20:44:13,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 20:44:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:14,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:15,050 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:44:15,063 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-09 20:44:15,064 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,080 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:15,082 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,147 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:15,158 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2020-12-09 20:44:15,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-09 20:44:15,186 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2020-12-09 20:44:15,190 INFO L625 ElimStorePlain]: treesize reduction 7, result has 30.0 percent of original size [2020-12-09 20:44:15,190 INFO L547 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,203 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2020-12-09 20:44:15,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-09 20:44:15,237 INFO L547 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2020-12-09 20:44:15,241 INFO L625 ElimStorePlain]: treesize reduction 7, result has 30.0 percent of original size [2020-12-09 20:44:15,241 INFO L547 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:15,296 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 20:44:15,296 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:83, output treesize:41 [2020-12-09 20:44:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:15,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376818287] [2020-12-09 20:44:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 20:44:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:15,607 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:15,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,617 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:15,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-09 20:44:15,785 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-09 20:44:15,786 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,823 INFO L625 ElimStorePlain]: treesize reduction 8, result has 78.4 percent of original size [2020-12-09 20:44:15,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:15,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:29 [2020-12-09 20:44:15,935 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2020-12-09 20:44:15,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:15,963 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:15,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-09 20:44:15,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:40 [2020-12-09 20:44:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:44:16,434 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2020-12-09 20:44:16,435 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:16,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:16,451 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:16,451 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:5 [2020-12-09 20:44:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:16,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:44:16,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2020-12-09 20:44:16,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 8, 9, 7] total 32 [2020-12-09 20:44:16,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820048632] [2020-12-09 20:44:16,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 20:44:16,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 20:44:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=873, Unknown=3, NotChecked=0, Total=992 [2020-12-09 20:44:16,527 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 10 states. [2020-12-09 20:44:19,362 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-09 20:44:19,902 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-09 20:44:20,425 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-09 20:44:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:20,495 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-09 20:44:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:44:20,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-09 20:44:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:20,496 INFO L225 Difference]: With dead ends: 86 [2020-12-09 20:44:20,496 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 20:44:20,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=199, Invalid=1204, Unknown=3, NotChecked=0, Total=1406 [2020-12-09 20:44:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 20:44:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-09 20:44:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 20:44:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-12-09 20:44:20,498 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 22 [2020-12-09 20:44:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:20,498 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-12-09 20:44:20,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 20:44:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-12-09 20:44:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 20:44:20,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:20,499 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:21,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 mathsat -unsat_core_generation=3,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:21,101 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash -591263241, now seen corresponding path program 2 times [2020-12-09 20:44:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:21,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954649154] [2020-12-09 20:44:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 40 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:44:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:21,172 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_53|], 1=[|v_#valid_61|]} [2020-12-09 20:44:21,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:21,177 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:44:21,178 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:21,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:21,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:21,201 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:21,216 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:21,217 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:21,217 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:44:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:21,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:22,479 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:44:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:22,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:22,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:22,485 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:44:22,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:22,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-12-09 20:44:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:22,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954649154] [2020-12-09 20:44:22,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353177963] [2020-12-09 20:44:22,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 41 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:22,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 20:44:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:44:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 20:44:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:22,574 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_55|], 1=[|v_#valid_63|]} [2020-12-09 20:44:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:22,580 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:44:22,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:22,600 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:22,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:22,607 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:22,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:22,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:22,625 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:44:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:24,844 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:44:24,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:24,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:24,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:24,850 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:44:24,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:24,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:1 [2020-12-09 20:44:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775496904] [2020-12-09 20:44:24,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:24,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 20:44:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:44:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:44:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:24,903 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_57|], 1=[|v_#valid_65|]} [2020-12-09 20:44:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:24,907 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-09 20:44:24,908 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:24,925 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:24,932 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 20:44:24,933 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:24,949 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:24,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:24,951 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-12-09 20:44:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:25,065 INFO L443 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-12-09 20:44:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:44:25,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:25,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:25,071 INFO L515 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-12-09 20:44:25,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:25,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-12-09 20:44:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:25,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:44:25,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9, 8, 8] total 29 [2020-12-09 20:44:25,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468178344] [2020-12-09 20:44:25,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 20:44:25,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 20:44:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-12-09 20:44:25,076 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 30 states. [2020-12-09 20:44:27,700 WARN L197 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-09 20:44:29,083 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-09 20:44:32,261 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-09 20:44:33,259 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-09 20:44:35,010 WARN L197 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-09 20:44:37,376 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-09 20:44:37,809 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-09 20:44:39,174 WARN L197 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-09 20:44:40,986 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-09 20:44:41,528 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-12-09 20:44:42,609 WARN L197 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-09 20:44:44,040 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-09 20:44:45,388 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-09 20:44:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:47,050 INFO L93 Difference]: Finished difference Result 371 states and 393 transitions. [2020-12-09 20:44:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-09 20:44:47,052 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2020-12-09 20:44:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:47,053 INFO L225 Difference]: With dead ends: 371 [2020-12-09 20:44:47,054 INFO L226 Difference]: Without dead ends: 371 [2020-12-09 20:44:47,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 20:44:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-09 20:44:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 119. [2020-12-09 20:44:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-09 20:44:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2020-12-09 20:44:47,057 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 23 [2020-12-09 20:44:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:47,057 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2020-12-09 20:44:47,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 20:44:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2020-12-09 20:44:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 20:44:47,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:47,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:47,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 mathsat -unsat_core_generation=3,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:47,660 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 417770760, now seen corresponding path program 1 times [2020-12-09 20:44:47,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:47,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571174604] [2020-12-09 20:44:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 43 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 20:44:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:48,027 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:44:48,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:48,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:48,048 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-09 20:44:48,049 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:48,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:48,060 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 20:44:48,060 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2020-12-09 20:44:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571174604] [2020-12-09 20:44:48,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [384171053] [2020-12-09 20:44:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 44 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 20:44:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:48,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:48,488 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:44:48,507 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:48,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:48,512 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-09 20:44:48,513 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:48,524 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:48,524 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 20:44:48,524 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:33, output treesize:15 [2020-12-09 20:44:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:48,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105021984] [2020-12-09 20:44:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 20:44:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:49,064 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:44:49,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:49,079 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:49,082 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-09 20:44:49,083 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:49,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:49,094 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-09 20:44:49,094 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2020-12-09 20:44:49,103 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 20:44:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:49,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:44:49,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9, 8, 8, 8] total 22 [2020-12-09 20:44:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972667803] [2020-12-09 20:44:49,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-09 20:44:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-09 20:44:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-12-09 20:44:49,324 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 23 states. [2020-12-09 20:44:49,754 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-12-09 20:44:50,693 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-09 20:44:51,047 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-09 20:44:51,739 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-09 20:44:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:51,784 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2020-12-09 20:44:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 20:44:51,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-09 20:44:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:51,786 INFO L225 Difference]: With dead ends: 165 [2020-12-09 20:44:51,787 INFO L226 Difference]: Without dead ends: 165 [2020-12-09 20:44:51,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 20:44:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-09 20:44:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 120. [2020-12-09 20:44:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-09 20:44:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2020-12-09 20:44:51,789 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 26 [2020-12-09 20:44:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:51,789 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2020-12-09 20:44:51,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-09 20:44:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2020-12-09 20:44:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 20:44:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:51,790 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-09 20:44:52,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 mathsat -unsat_core_generation=3,44 cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:52,392 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2020-12-09 20:44:52,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:52,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87943365] [2020-12-09 20:44:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 46 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 20:44:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:52,490 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:52,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:44:52,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:52,518 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:44:52,519 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:52,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:44:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:52,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:53,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87943365] [2020-12-09 20:44:53,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [575624900] [2020-12-09 20:44:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 47 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 20:44:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:53,224 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:53,224 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:44:53,225 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:53,247 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 20:44:53,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:53,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-09 20:44:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605302301] [2020-12-09 20:44:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 20:44:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:54,443 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:54,443 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:44:54,443 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:54,467 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 20:44:54,468 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:54,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-09 20:44:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:54,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:44:54,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:44:54,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 9, 9, 9] total 26 [2020-12-09 20:44:54,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977576765] [2020-12-09 20:44:54,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 20:44:54,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:54,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 20:44:54,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2020-12-09 20:44:54,516 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand 27 states. [2020-12-09 20:44:55,442 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-09 20:44:55,901 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-09 20:44:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:56,801 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2020-12-09 20:44:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 20:44:56,802 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-09 20:44:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:56,803 INFO L225 Difference]: With dead ends: 156 [2020-12-09 20:44:56,803 INFO L226 Difference]: Without dead ends: 156 [2020-12-09 20:44:56,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 20:44:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-09 20:44:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-12-09 20:44:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-09 20:44:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2020-12-09 20:44:56,806 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 28 [2020-12-09 20:44:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:56,806 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2020-12-09 20:44:56,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 20:44:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2020-12-09 20:44:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 20:44:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:56,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:57,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 mathsat -unsat_core_generation=3,47 cvc4 --incremental --print-success --lang smt,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:57,411 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2020-12-09 20:44:57,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:57,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538328270] [2020-12-09 20:44:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 49 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:44:57,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:57,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:57,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:57,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:57,642 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:57,643 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:57,643 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:5 [2020-12-09 20:44:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:57,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538328270] [2020-12-09 20:44:57,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [221672953] [2020-12-09 20:44:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 50 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:44:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 20:44:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:57,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:57,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:57,922 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:57,927 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:57,928 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:57,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:5 [2020-12-09 20:44:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:57,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833878302] [2020-12-09 20:44:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:44:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:44:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:58,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:44:58,032 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-12-09 20:44:58,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:58,038 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:58,038 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:58,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:5 [2020-12-09 20:44:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:58,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 20:44:58,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2020-12-09 20:44:58,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915584545] [2020-12-09 20:44:58,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 20:44:58,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:44:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 20:44:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-09 20:44:58,055 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand 12 states. [2020-12-09 20:44:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:58,803 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2020-12-09 20:44:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 20:44:58,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-12-09 20:44:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:58,804 INFO L225 Difference]: With dead ends: 142 [2020-12-09 20:44:58,804 INFO L226 Difference]: Without dead ends: 142 [2020-12-09 20:44:58,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-12-09 20:44:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-09 20:44:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-12-09 20:44:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-09 20:44:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-12-09 20:44:58,807 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 30 [2020-12-09 20:44:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:58,807 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-12-09 20:44:58,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 20:44:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-12-09 20:44:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 20:44:58,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:58,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:59,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 cvc4 --incremental --print-success --lang smt,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 mathsat -unsat_core_generation=3 [2020-12-09 20:44:59,410 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:44:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2020-12-09 20:44:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:44:59,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77342020] [2020-12-09 20:44:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 52 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with mathsat -unsat_core_generation=3 [2020-12-09 20:44:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 20:44:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:44:59,543 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:44:59,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:44:59,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:44:59,573 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:44:59,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:44:59,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-12-09 20:44:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:44:59,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:45:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 20:45:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77342020] [2020-12-09 20:45:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526476835] [2020-12-09 20:45:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 53 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:45:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:45:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 20:45:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:45:00,213 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:00,213 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:45:00,214 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:45:00,235 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-09 20:45:00,236 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:45:00,236 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-09 20:45:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:45:00,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:45:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:45:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562479132] [2020-12-09 20:45:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:45:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:45:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 20:45:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:45:01,772 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:01,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:45:01,773 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:45:01,799 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-12-09 20:45:01,801 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:45:01,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-12-09 20:45:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:45:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:45:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 20:45:02,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2020-12-09 20:45:02,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7, 10, 10, 12] total 36 [2020-12-09 20:45:02,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171261209] [2020-12-09 20:45:02,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:45:02,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:45:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:45:02,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 20:45:02,585 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 5 states. [2020-12-09 20:45:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:45:02,788 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-12-09 20:45:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:45:02,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-09 20:45:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:45:02,789 INFO L225 Difference]: With dead ends: 120 [2020-12-09 20:45:02,790 INFO L226 Difference]: Without dead ends: 117 [2020-12-09 20:45:02,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 20:45:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-09 20:45:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-09 20:45:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-09 20:45:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2020-12-09 20:45:02,792 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 32 [2020-12-09 20:45:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:45:02,792 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2020-12-09 20:45:02,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:45:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2020-12-09 20:45:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 20:45:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:45:02,792 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-09 20:45:03,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 mathsat -unsat_core_generation=3,53 cvc4 --incremental --print-success --lang smt [2020-12-09 20:45:03,393 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:45:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:45:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 2 times [2020-12-09 20:45:03,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:45:03,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262187715] [2020-12-09 20:45:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/mathsat Starting monitored process 55 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with mathsat -unsat_core_generation=3 [2020-12-09 20:45:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:45:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 20:45:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:45:03,528 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:03,528 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 20:45:03,529 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:45:03,564 INFO L625 ElimStorePlain]: treesize reduction 10, result has 74.4 percent of original size [2020-12-09 20:45:03,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:45:03,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-09 20:45:03,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-09 20:45:03,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:45:03,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:03,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:45:03,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-09 20:45:04,014 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2020-12-09 20:45:04,015 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:45:04,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:04,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 20:45:04,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:40 [2020-12-09 20:45:04,182 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:45:04,210 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:45:04,211 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 45 [2020-12-09 20:45:04,212 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 20:45:04,212 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:45:04,213 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-09 20:45:04,213 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 20:45:04,214 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:45:04,285 INFO L625 ElimStorePlain]: treesize reduction 13, result has 75.9 percent of original size [2020-12-09 20:45:04,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:45:04,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:13 [2020-12-09 20:45:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:45:04,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:45:05,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262187715] [2020-12-09 20:45:05,173 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 20:45:05,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [158946589] [2020-12-09 20:45:05,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/cvc4 Starting monitored process 56 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:45:05,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 20:45:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:45:05,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 20:45:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:45:05,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5922c5be [2020-12-09 20:45:05,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643979343] [2020-12-09 20:45:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93d8e0db-9409-4443-9856-67ff0a7da9da/bin/utaipan/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:45:05,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 20:45:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:45:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 20:45:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:45:05,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5922c5be [2020-12-09 20:45:05,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:45:05,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 20:45:05,412 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 20:45:05,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:45:06,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 cvc4 --incremental --print-success --lang smt,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 mathsat -unsat_core_generation=3 [2020-12-09 20:45:06,032 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 20:45:06,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:45:06 BoogieIcfgContainer [2020-12-09 20:45:06,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:45:06,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:45:06,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:45:06,033 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:45:06,033 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:43:23" (3/4) ... [2020-12-09 20:45:06,036 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 20:45:06,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:45:06,037 INFO L168 Benchmark]: Toolchain (without parser) took 103370.71 ms. Allocated memory was 52.4 MB in the beginning and 79.7 MB in the end (delta: 27.3 MB). Free memory was 28.7 MB in the beginning and 20.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,037 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 34.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:45:06,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.21 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 37.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.00 ms. Allocated memory is still 65.0 MB. Free memory was 37.6 MB in the beginning and 35.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,038 INFO L168 Benchmark]: Boogie Preprocessor took 23.05 ms. Allocated memory is still 65.0 MB. Free memory was 35.7 MB in the beginning and 34.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,038 INFO L168 Benchmark]: RCFGBuilder took 380.93 ms. Allocated memory is still 65.0 MB. Free memory was 34.2 MB in the beginning and 42.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,039 INFO L168 Benchmark]: TraceAbstraction took 102576.46 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 20.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:45:06,039 INFO L168 Benchmark]: Witness Printer took 3.69 ms. Allocated memory is still 79.7 MB. Free memory is still 20.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:45:06,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 34.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.21 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 37.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.00 ms. Allocated memory is still 65.0 MB. Free memory was 37.6 MB in the beginning and 35.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.05 ms. Allocated memory is still 65.0 MB. Free memory was 35.7 MB in the beginning and 34.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 380.93 ms. Allocated memory is still 65.0 MB. Free memory was 34.2 MB in the beginning and 42.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 102576.46 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 42.1 MB in the beginning and 20.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.69 ms. Allocated memory is still 79.7 MB. Free memory is still 20.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 516]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L522] int length1 = __VERIFIER_nondet_int(); [L523] int length2 = __VERIFIER_nondet_int(); [L524] COND FALSE !(length1 < 1) [L527] COND FALSE !(length2 < 1) [L530] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); [L531] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); [L533] int i = 0; [L533] COND TRUE i < length1 -1 [L535] nondetString1[i] = __VERIFIER_nondet_char() [L533] i++ [L533] COND FALSE !(i < length1 -1) [L537] int i = 0; [L537] COND TRUE i< length2 -1 [L539] nondetString2[i] = __VERIFIER_nondet_char() [L537] i++ [L537] COND FALSE !(i< length2 -1) [L542] nondetString1[length1-1] = '\0' [L543] nondetString2[length2-1] = '\0' [L516] EXPR \read(*s1) [L516] EXPR s2++ [L516] COND TRUE *s1 == *s2++ [L517] EXPR s1++ [L517] COND FALSE !(*s1++ == 0) [L516] EXPR \read(*s1) [L516] EXPR s2++ [L516] COND TRUE *s1 == *s2++ [L517] EXPR s1++ [L517] COND FALSE !(*s1++ == 0) [L516] \read(*s1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 102.5s, OverallIterations: 36, TraceHistogramMax: 5, AutomataDifference: 54.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1062 SDtfs, 6433 SDslu, 3665 SDs, 0 SdLazy, 4236 SolverSat, 338 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 30.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1590 GetRequests, 1129 SyntacticMatches, 31 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 47.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 35 MinimizatonAttempts, 1157 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 949 NumberOfCodeBlocks, 949 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 1454 ConstructedInterpolants, 71 QuantifiedInterpolants, 409077 SizeOfPredicates, 455 NumberOfNonLiveVariables, 3345 ConjunctsInSsa, 667 ConjunctsInUnsatCore, 79 InterpolantComputations, 28 PerfectInterpolantSequences, 49/392 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 Received shutdown request...