./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 2d5a995d825785bc5dc95f3825623b1e4ecd07fe ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 2d5a995d825785bc5dc95f3825623b1e4ecd07fe ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:28:38,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:28:38,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:28:38,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:28:38,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:28:38,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:28:38,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:28:38,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:28:38,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:28:38,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:28:38,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:28:38,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:28:38,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:28:38,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:28:38,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:28:38,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:28:38,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:28:38,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:28:38,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:28:38,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:28:38,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:28:38,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:28:38,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:28:38,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:28:38,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:28:38,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:28:38,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:28:38,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:28:38,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:28:38,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:28:38,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:28:38,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:28:38,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:28:38,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:28:38,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:28:38,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:28:38,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:28:38,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:28:38,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:28:38,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:28:38,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:28:38,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:28:38,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:28:38,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:28:38,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:28:38,370 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:28:38,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:28:38,371 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:28:38,371 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:28:38,371 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:28:38,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:28:38,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:28:38,373 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:28:38,373 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:28:38,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:28:38,374 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:28:38,374 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:28:38,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:28:38,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:28:38,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:28:38,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:28:38,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:28:38,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:28:38,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:28:38,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:28:38,387 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:28:38,387 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:28:38,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:28:38,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:28:38,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:28:38,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:28:38,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:28:38,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:28:38,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:28:38,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:28:38,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:28:38,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:28:38,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:28:38,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:28:38,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:28:38,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:28:38,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:28:38,395 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_8115fdc4-ea3b-44a2-a419-36a2650675b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d5a995d825785bc5dc95f3825623b1e4ecd07fe [2020-11-30 02:28:38,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:28:38,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:28:38,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:28:38,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:28:38,778 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:28:38,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2020-11-30 02:28:38,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/ffea37a93/aeb383546012457c88927ae3fdc18373/FLAG56ea49fa1 [2020-11-30 02:28:39,415 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:28:39,415 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2020-11-30 02:28:39,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/ffea37a93/aeb383546012457c88927ae3fdc18373/FLAG56ea49fa1 [2020-11-30 02:28:39,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/ffea37a93/aeb383546012457c88927ae3fdc18373 [2020-11-30 02:28:39,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:28:39,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:28:39,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:28:39,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:28:39,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:28:39,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:28:39" (1/1) ... [2020-11-30 02:28:39,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc00c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:39, skipping insertion in model container [2020-11-30 02:28:39,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:28:39" (1/1) ... [2020-11-30 02:28:39,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:28:39,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:28:40,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:28:40,278 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:28:40,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:28:40,414 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:28:40,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40 WrapperNode [2020-11-30 02:28:40,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:28:40,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:28:40,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:28:40,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:28:40,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:28:40,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:28:40,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:28:40,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:28:40,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... [2020-11-30 02:28:40,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:28:40,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:28:40,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:28:40,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:28:40,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:28:40,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:28:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:28:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:28:40,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:28:40,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:28:41,407 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:28:41,408 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:28:41,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:28:41 BoogieIcfgContainer [2020-11-30 02:28:41,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:28:41,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:28:41,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:28:41,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:28:41,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:28:39" (1/3) ... [2020-11-30 02:28:41,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4870b8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:28:41, skipping insertion in model container [2020-11-30 02:28:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:28:40" (2/3) ... [2020-11-30 02:28:41,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4870b8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:28:41, skipping insertion in model container [2020-11-30 02:28:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:28:41" (3/3) ... [2020-11-30 02:28:41,424 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2020-11-30 02:28:41,436 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:28:41,440 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 02:28:41,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 02:28:41,471 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:28:41,472 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:28:41,472 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:28:41,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:28:41,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:28:41,472 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:28:41,472 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:28:41,473 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:28:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-30 02:28:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:28:41,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:41,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:28:41,494 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]=== [2020-11-30 02:28:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 165069, now seen corresponding path program 1 times [2020-11-30 02:28:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:41,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631714914] [2020-11-30 02:28:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631714914] [2020-11-30 02:28:41,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:41,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:28:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491012320] [2020-11-30 02:28:41,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:41,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:41,715 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-30 02:28:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:41,811 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-11-30 02:28:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:41,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:28:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:41,823 INFO L225 Difference]: With dead ends: 38 [2020-11-30 02:28:41,823 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 02:28:41,827 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 [2020-11-30 02:28:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 02:28:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-30 02:28:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 02:28:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-11-30 02:28:41,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 3 [2020-11-30 02:28:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:41,885 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-11-30 02:28:41,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-11-30 02:28:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:28:41,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:41,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:28:41,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:28:41,886 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]=== [2020-11-30 02:28:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 165070, now seen corresponding path program 1 times [2020-11-30 02:28:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:41,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087472960] [2020-11-30 02:28:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:42,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087472960] [2020-11-30 02:28:42,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:42,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:28:42,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121885076] [2020-11-30 02:28:42,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:28:42,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:42,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:28:42,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:28:42,016 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 4 states. [2020-11-30 02:28:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:42,193 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-11-30 02:28:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:28:42,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 02:28:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:42,195 INFO L225 Difference]: With dead ends: 72 [2020-11-30 02:28:42,195 INFO L226 Difference]: Without dead ends: 72 [2020-11-30 02:28:42,196 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 [2020-11-30 02:28:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-30 02:28:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2020-11-30 02:28:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 02:28:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-11-30 02:28:42,209 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 3 [2020-11-30 02:28:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:42,210 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-11-30 02:28:42,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:28:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-11-30 02:28:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:28:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:42,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:28:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:28:42,211 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]=== [2020-11-30 02:28:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 5235302, now seen corresponding path program 1 times [2020-11-30 02:28:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191064078] [2020-11-30 02:28:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:42,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191064078] [2020-11-30 02:28:42,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:42,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:28:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802153829] [2020-11-30 02:28:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:42,346 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 3 states. [2020-11-30 02:28:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:42,401 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-30 02:28:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:42,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:28:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:42,403 INFO L225 Difference]: With dead ends: 38 [2020-11-30 02:28:42,403 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 02:28:42,403 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 [2020-11-30 02:28:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 02:28:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-30 02:28:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 02:28:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-30 02:28:42,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 4 [2020-11-30 02:28:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:42,408 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-30 02:28:42,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-30 02:28:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:28:42,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:42,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:28:42,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:28:42,410 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]=== [2020-11-30 02:28:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 5232037, now seen corresponding path program 1 times [2020-11-30 02:28:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:42,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143063009] [2020-11-30 02:28:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:42,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143063009] [2020-11-30 02:28:42,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:42,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:28:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047088070] [2020-11-30 02:28:42,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:42,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:42,463 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 3 states. [2020-11-30 02:28:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:42,509 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-11-30 02:28:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:42,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:28:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:42,511 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:28:42,511 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:28:42,511 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 [2020-11-30 02:28:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:28:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 02:28:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 02:28:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-11-30 02:28:42,515 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 4 [2020-11-30 02:28:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:42,516 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-11-30 02:28:42,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-11-30 02:28:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:28:42,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:42,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:28:42,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:28:42,520 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]=== [2020-11-30 02:28:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash 5232038, now seen corresponding path program 1 times [2020-11-30 02:28:42,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:42,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636276068] [2020-11-30 02:28:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:42,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636276068] [2020-11-30 02:28:42,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:42,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053718721] [2020-11-30 02:28:42,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:28:42,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:28:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:28:42,639 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2020-11-30 02:28:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:42,789 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-11-30 02:28:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:28:42,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-30 02:28:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:42,791 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:28:42,791 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 02:28:42,792 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 [2020-11-30 02:28:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 02:28:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-11-30 02:28:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 02:28:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-11-30 02:28:42,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 4 [2020-11-30 02:28:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:42,801 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-11-30 02:28:42,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:28:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-11-30 02:28:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:28:42,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:42,802 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 02:28:42,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:28:42,803 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]=== [2020-11-30 02:28:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash 158734875, now seen corresponding path program 1 times [2020-11-30 02:28:42,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:42,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69591571] [2020-11-30 02:28:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:42,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69591571] [2020-11-30 02:28:42,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242044389] [2020-11-30 02:28:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:28:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:43,072 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_46|], 2=[|v_#valid_70|]} [2020-11-30 02:28:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:28:43,097 INFO L384 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 [2020-11-30 02:28:43,098 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:28:43,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:28:43,130 INFO L384 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 23 treesize of output 21 [2020-11-30 02:28:43,136 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-11-30 02:28:43,174 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-11-30 02:28:43,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:28:43,177 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:12 [2020-11-30 02:28:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:43,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:43,342 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:28:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:43,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421584215] [2020-11-30 02:28:43,405 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 02:28:43,406 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:43,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:43,425 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:43,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:44,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:44,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:44,436 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:28:44,634 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-30 02:28:44,796 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 02:28:44,975 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-11-30 02:28:44,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:28:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-30 02:28:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589511668] [2020-11-30 02:28:44,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:28:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:28:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:28:44,980 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 11 states. [2020-11-30 02:28:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:45,379 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-11-30 02:28:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:28:45,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-30 02:28:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:45,381 INFO L225 Difference]: With dead ends: 102 [2020-11-30 02:28:45,381 INFO L226 Difference]: Without dead ends: 102 [2020-11-30 02:28:45,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:28:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-30 02:28:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 35. [2020-11-30 02:28:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 02:28:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-30 02:28:45,387 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 5 [2020-11-30 02:28:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:45,387 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-30 02:28:45,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 02:28:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-30 02:28:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:28:45,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:45,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:28:45,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:28:45,589 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]=== [2020-11-30 02:28:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash 162294356, now seen corresponding path program 1 times [2020-11-30 02:28:45,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:45,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383529136] [2020-11-30 02:28:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:45,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383529136] [2020-11-30 02:28:45,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:45,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:45,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786865679] [2020-11-30 02:28:45,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:28:45,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:45,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:28:45,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:28:45,815 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2020-11-30 02:28:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:45,896 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-11-30 02:28:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:28:45,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-30 02:28:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:45,898 INFO L225 Difference]: With dead ends: 61 [2020-11-30 02:28:45,898 INFO L226 Difference]: Without dead ends: 61 [2020-11-30 02:28:45,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:28:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-30 02:28:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-11-30 02:28:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 02:28:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-11-30 02:28:45,902 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 5 [2020-11-30 02:28:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:45,902 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-11-30 02:28:45,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:28:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-11-30 02:28:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:28:45,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:45,903 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-30 02:28:45,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-30 02:28:45,903 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]=== [2020-11-30 02:28:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 733109027, now seen corresponding path program 1 times [2020-11-30 02:28:45,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:45,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282540348] [2020-11-30 02:28:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282540348] [2020-11-30 02:28:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492833005] [2020-11-30 02:28:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:28:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:46,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:46,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746411239] [2020-11-30 02:28:46,303 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-30 02:28:46,303 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:46,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:46,304 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:46,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:46,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:46,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:46,872 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:28:47,094 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-11-30 02:28:47,432 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-11-30 02:28:47,604 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-30 02:28:47,790 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-11-30 02:28:47,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:47,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:28:47,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-11-30 02:28:47,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652127967] [2020-11-30 02:28:47,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:28:47,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:28:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:28:47,794 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 13 states. [2020-11-30 02:28:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:48,122 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-11-30 02:28:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:28:48,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 6 [2020-11-30 02:28:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:48,124 INFO L225 Difference]: With dead ends: 87 [2020-11-30 02:28:48,124 INFO L226 Difference]: Without dead ends: 87 [2020-11-30 02:28:48,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-11-30 02:28:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-30 02:28:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2020-11-30 02:28:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 02:28:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-11-30 02:28:48,129 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 6 [2020-11-30 02:28:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:48,132 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-11-30 02:28:48,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:28:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-11-30 02:28:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:28:48,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:48,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:48,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:48,357 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]=== [2020-11-30 02:28:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1251644535, now seen corresponding path program 1 times [2020-11-30 02:28:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:48,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100427187] [2020-11-30 02:28:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:48,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100427187] [2020-11-30 02:28:48,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707769877] [2020-11-30 02:28:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:28:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:48,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:28:48,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 8 [2020-11-30 02:28:48,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137548905] [2020-11-30 02:28:48,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:28:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:28:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:28:48,703 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-11-30 02:28:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:48,743 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-11-30 02:28:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:48,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:28:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:48,744 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:28:48,744 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:28:48,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:28:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:28:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-11-30 02:28:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:28:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-30 02:28:48,748 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 7 [2020-11-30 02:28:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:48,748 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-30 02:28:48,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:28:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-30 02:28:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:28:48,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:48,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:48,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:48,949 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]=== [2020-11-30 02:28:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1219779455, now seen corresponding path program 1 times [2020-11-30 02:28:48,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:48,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064413920] [2020-11-30 02:28:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064413920] [2020-11-30 02:28:49,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:28:49,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381710732] [2020-11-30 02:28:49,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:28:49,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:28:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:28:49,022 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 4 states. [2020-11-30 02:28:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,068 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-11-30 02:28:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:28:49,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 02:28:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,070 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:28:49,070 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:28:49,070 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 [2020-11-30 02:28:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:28:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 02:28:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 02:28:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 02:28:49,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2020-11-30 02:28:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,073 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 02:28:49,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:28:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 02:28:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:28:49,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-30 02:28:49,074 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]=== [2020-11-30 02:28:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,074 INFO L82 PathProgramCache]: Analyzing trace with hash 841549668, now seen corresponding path program 1 times [2020-11-30 02:28:49,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328036670] [2020-11-30 02:28:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328036670] [2020-11-30 02:28:49,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659856153] [2020-11-30 02:28:49,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:28:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:28:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:28:49,127 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-11-30 02:28:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,179 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-30 02:28:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:28:49,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 02:28:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,181 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:28:49,181 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:28:49,181 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 [2020-11-30 02:28:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:28:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 02:28:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:28:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 02:28:49,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2020-11-30 02:28:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,183 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 02:28:49,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:28:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 02:28:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:28:49,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-30 02:28:49,184 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]=== [2020-11-30 02:28:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 841549669, now seen corresponding path program 1 times [2020-11-30 02:28:49,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055657578] [2020-11-30 02:28:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055657578] [2020-11-30 02:28:49,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:49,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313901143] [2020-11-30 02:28:49,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:28:49,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:28:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:28:49,258 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-11-30 02:28:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,335 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-11-30 02:28:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:28:49,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-30 02:28:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,336 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:28:49,336 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:28:49,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:28:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:28:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-30 02:28:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 02:28:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-30 02:28:49,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 9 [2020-11-30 02:28:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,340 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-30 02:28:49,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:28:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-30 02:28:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:28:49,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-30 02:28:49,341 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]=== [2020-11-30 02:28:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash 318235976, now seen corresponding path program 1 times [2020-11-30 02:28:49,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93237866] [2020-11-30 02:28:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93237866] [2020-11-30 02:28:49,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:28:49,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571100692] [2020-11-30 02:28:49,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:49,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,382 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 3 states. [2020-11-30 02:28:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,410 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2020-11-30 02:28:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:49,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-30 02:28:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,412 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:28:49,412 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:28:49,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:28:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 02:28:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:28:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-11-30 02:28:49,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 10 [2020-11-30 02:28:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,417 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-11-30 02:28:49,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-11-30 02:28:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:28:49,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-30 02:28:49,418 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]=== [2020-11-30 02:28:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash 318235977, now seen corresponding path program 1 times [2020-11-30 02:28:49,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112119151] [2020-11-30 02:28:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112119151] [2020-11-30 02:28:49,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:28:49,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719335566] [2020-11-30 02:28:49,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:28:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:28:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:28:49,485 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-11-30 02:28:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,557 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-30 02:28:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:28:49,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:28:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,558 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:28:49,558 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 02:28:49,558 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 [2020-11-30 02:28:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 02:28:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-30 02:28:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:28:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-11-30 02:28:49,560 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 10 [2020-11-30 02:28:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,560 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-11-30 02:28:49,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:28:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-11-30 02:28:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:28:49,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,561 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-30 02:28:49,561 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]=== [2020-11-30 02:28:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1398118962, now seen corresponding path program 1 times [2020-11-30 02:28:49,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855857022] [2020-11-30 02:28:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855857022] [2020-11-30 02:28:49,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:49,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151621287] [2020-11-30 02:28:49,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,592 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-11-30 02:28:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,608 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-11-30 02:28:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:49,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-30 02:28:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,610 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:28:49,610 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:28:49,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:28:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:28:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:28:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:28:49,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2020-11-30 02:28:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,612 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:28:49,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:28:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:28:49,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-30 02:28:49,613 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]=== [2020-11-30 02:28:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash 456494658, now seen corresponding path program 1 times [2020-11-30 02:28:49,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847073153] [2020-11-30 02:28:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847073153] [2020-11-30 02:28:49,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:28:49,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721163484] [2020-11-30 02:28:49,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:28:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:28:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,662 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 3 states. [2020-11-30 02:28:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:49,673 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-30 02:28:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:28:49,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-30 02:28:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:49,674 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:28:49,674 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:28:49,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:28:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:28:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:28:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:28:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-30 02:28:49,676 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-11-30 02:28:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:49,676 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-30 02:28:49,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:28:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-30 02:28:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:28:49,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:49,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:49,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-30 02:28:49,677 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]=== [2020-11-30 02:28:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1356994247, now seen corresponding path program 1 times [2020-11-30 02:28:49,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:49,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663908094] [2020-11-30 02:28:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:49,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663908094] [2020-11-30 02:28:49,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:28:49,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 02:28:49,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874026986] [2020-11-30 02:28:49,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:28:49,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:49,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:28:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:28:49,889 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-11-30 02:28:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:50,047 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-11-30 02:28:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:28:50,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-30 02:28:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:50,047 INFO L225 Difference]: With dead ends: 42 [2020-11-30 02:28:50,048 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 02:28:50,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:28:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 02:28:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-30 02:28:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 02:28:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-30 02:28:50,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2020-11-30 02:28:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:50,050 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-30 02:28:50,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:28:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-30 02:28:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:28:50,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:50,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:50,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-30 02:28:50,051 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]=== [2020-11-30 02:28:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 283894100, now seen corresponding path program 1 times [2020-11-30 02:28:50,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:50,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153120804] [2020-11-30 02:28:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:50,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153120804] [2020-11-30 02:28:50,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326150997] [2020-11-30 02:28:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:28:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:50,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935444695] [2020-11-30 02:28:50,363 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 02:28:50,364 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:50,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:50,365 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:50,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:50,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:50,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:51,084 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:28:51,224 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 02:28:51,386 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 02:28:51,691 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:28:51,918 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-11-30 02:28:52,315 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-11-30 02:28:52,709 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2020-11-30 02:28:53,139 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2020-11-30 02:28:53,506 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2020-11-30 02:28:53,906 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2020-11-30 02:28:54,399 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 105 [2020-11-30 02:28:54,853 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-11-30 02:28:55,303 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2020-11-30 02:28:55,792 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2020-11-30 02:28:55,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:28:55,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6, 6, 6] total 25 [2020-11-30 02:28:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268381579] [2020-11-30 02:28:55,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:28:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:28:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:28:55,796 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-11-30 02:28:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:56,117 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-11-30 02:28:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:28:56,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-30 02:28:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:56,118 INFO L225 Difference]: With dead ends: 41 [2020-11-30 02:28:56,118 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:28:56,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:28:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:28:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-11-30 02:28:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 02:28:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-30 02:28:56,120 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2020-11-30 02:28:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:56,121 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-30 02:28:56,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:28:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-30 02:28:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 02:28:56,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:56,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:56,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:56,329 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]=== [2020-11-30 02:28:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1668513865, now seen corresponding path program 1 times [2020-11-30 02:28:56,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:56,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196493435] [2020-11-30 02:28:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:28:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196493435] [2020-11-30 02:28:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044114768] [2020-11-30 02:28:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:28:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-30 02:28:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:28:56,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:28:56,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974318071] [2020-11-30 02:28:56,847 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-11-30 02:28:56,848 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:56,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:56,848 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:56,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:57,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:57,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:58,393 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:28:58,794 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-11-30 02:28:58,957 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-11-30 02:28:59,146 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 02:28:59,426 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-11-30 02:28:59,631 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-11-30 02:28:59,861 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-11-30 02:29:00,263 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-11-30 02:29:01,077 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 135 [2020-11-30 02:29:01,522 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-11-30 02:29:01,884 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-11-30 02:29:02,196 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-11-30 02:29:02,634 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-11-30 02:29:03,014 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-11-30 02:29:03,382 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-11-30 02:29:03,788 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2020-11-30 02:29:03,789 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:03,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:29:03,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2020-11-30 02:29:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392940043] [2020-11-30 02:29:03,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:29:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:29:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 02:29:03,792 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 18 states. [2020-11-30 02:29:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:04,194 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-11-30 02:29:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:29:04,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-30 02:29:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:04,195 INFO L225 Difference]: With dead ends: 47 [2020-11-30 02:29:04,196 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 02:29:04,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:29:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 02:29:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-11-30 02:29:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 02:29:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-11-30 02:29:04,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 21 [2020-11-30 02:29:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:04,200 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-11-30 02:29:04,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:29:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-11-30 02:29:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 02:29:04,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:04,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:04,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-30 02:29:04,401 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]=== [2020-11-30 02:29:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash -184322249, now seen corresponding path program 1 times [2020-11-30 02:29:04,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:04,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568562252] [2020-11-30 02:29:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:29:04,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568562252] [2020-11-30 02:29:04,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639725539] [2020-11-30 02:29:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:29:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:29:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:29:04,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746578207] [2020-11-30 02:29:04,764 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-11-30 02:29:04,764 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:29:04,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:29:04,764 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:29:04,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:29:05,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:29:05,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:29:06,045 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:29:06,383 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-11-30 02:29:06,614 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 02:29:06,880 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-11-30 02:29:07,159 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-11-30 02:29:07,469 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-11-30 02:29:08,291 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 135 [2020-11-30 02:29:08,707 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-11-30 02:29:08,980 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-11-30 02:29:09,327 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-11-30 02:29:09,742 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-11-30 02:29:10,117 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-11-30 02:29:10,480 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-11-30 02:29:10,894 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2020-11-30 02:29:10,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:29:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2020-11-30 02:29:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15908113] [2020-11-30 02:29:10,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:29:10,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:29:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2020-11-30 02:29:10,896 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2020-11-30 02:29:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:11,169 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-11-30 02:29:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:29:11,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-11-30 02:29:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:11,170 INFO L225 Difference]: With dead ends: 45 [2020-11-30 02:29:11,170 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 02:29:11,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 02:29:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 02:29:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-11-30 02:29:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 02:29:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-30 02:29:11,173 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 22 [2020-11-30 02:29:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:11,173 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-30 02:29:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:29:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-30 02:29:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 02:29:11,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:11,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:11,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:11,389 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]=== [2020-11-30 02:29:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash 976821529, now seen corresponding path program 2 times [2020-11-30 02:29:11,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75028161] [2020-11-30 02:29:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:29:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75028161] [2020-11-30 02:29:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802718635] [2020-11-30 02:29:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:11,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:29:11,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:29:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 02:29:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:29:12,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:12,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 02:29:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977207615] [2020-11-30 02:29:12,656 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-11-30 02:29:12,656 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:29:12,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:29:12,656 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:29:12,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:29:12,684 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5cdd98de 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:566) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:439) 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 02:29:12,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:29:12,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-30 02:29:12,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227137464] [2020-11-30 02:29:12,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:29:12,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:29:12,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:29:12,690 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-11-30 02:29:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:29:12,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-11-30 02:29:12,891 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@5cdd98de 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 02:29:12,895 INFO L168 Benchmark]: Toolchain (without parser) took 33134.22 ms. Allocated memory was 100.7 MB in the beginning and 255.9 MB in the end (delta: 155.2 MB). Free memory was 72.4 MB in the beginning and 85.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 142.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,895 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 100.7 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:12,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.30 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 65.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,896 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.94 ms. Allocated memory is still 100.7 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,896 INFO L168 Benchmark]: Boogie Preprocessor took 46.71 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,897 INFO L168 Benchmark]: RCFGBuilder took 874.74 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 61.7 MB in the beginning and 75.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,897 INFO L168 Benchmark]: TraceAbstraction took 31482.17 ms. Allocated memory was 121.6 MB in the beginning and 255.9 MB in the end (delta: 134.2 MB). Free memory was 74.5 MB in the beginning and 85.5 MB in the end (delta: -11.1 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:12,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 100.7 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 648.30 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 65.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.94 ms. Allocated memory is still 100.7 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.71 ms. Allocated memory is still 100.7 MB. Free memory was 63.3 MB in the beginning and 61.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 874.74 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 61.7 MB in the beginning and 75.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31482.17 ms. Allocated memory was 121.6 MB in the beginning and 255.9 MB in the end (delta: 134.2 MB). Free memory was 74.5 MB in the beginning and 85.5 MB in the end (delta: -11.1 MB). Peak memory consumption was 122.7 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@5cdd98de de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5cdd98de: 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-a4ecdab [2020-11-30 02:29:15,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:29:15,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:29:15,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:29:15,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:29:15,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:29:15,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:29:15,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:29:15,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:29:15,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:29:15,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:29:15,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:29:15,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:29:15,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:29:15,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:29:15,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:29:15,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:29:15,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:29:15,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:29:15,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:29:15,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:29:15,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:29:15,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:29:15,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:29:15,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:29:15,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:29:15,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:29:15,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:29:15,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:29:15,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:29:15,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:29:15,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:29:15,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:29:15,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:29:15,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:29:15,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:29:15,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:29:15,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:29:15,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:29:15,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:29:15,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:29:15,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-30 02:29:15,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:29:15,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:29:15,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:29:15,532 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:29:15,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:29:15,533 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:29:15,533 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:29:15,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:29:15,534 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:29:15,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:29:15,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:29:15,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:29:15,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:29:15,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:29:15,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:29:15,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:29:15,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:29:15,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:29:15,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:29:15,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:29:15,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:29:15,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:29:15,540 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:29:15,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:29:15,541 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:29:15,541 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:29:15,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:29:15,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:29:15,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:29:15,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:29:15,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:29:15,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:29:15,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:29:15,543 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:29:15,561 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:29:15,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:29:15,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:29:15,562 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_8115fdc4-ea3b-44a2-a419-36a2650675b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d5a995d825785bc5dc95f3825623b1e4ecd07fe [2020-11-30 02:29:15,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:29:15,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:29:15,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:29:15,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:29:15,987 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:29:15,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2020-11-30 02:29:16,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/3aa8a2c62/96bd1c3194ad47feaea86d5870e3a424/FLAGdeb6e857f [2020-11-30 02:29:16,696 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:29:16,697 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2020-11-30 02:29:16,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/3aa8a2c62/96bd1c3194ad47feaea86d5870e3a424/FLAGdeb6e857f [2020-11-30 02:29:16,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/data/3aa8a2c62/96bd1c3194ad47feaea86d5870e3a424 [2020-11-30 02:29:16,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:29:16,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:29:16,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:16,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:29:16,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:29:16,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:16" (1/1) ... [2020-11-30 02:29:16,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e867df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:16, skipping insertion in model container [2020-11-30 02:29:16,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:16" (1/1) ... [2020-11-30 02:29:16,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:29:17,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:29:17,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:17,412 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:29:17,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:17,563 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:29:17,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17 WrapperNode [2020-11-30 02:29:17,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:17,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:17,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:29:17,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:29:17,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:17,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:29:17,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:29:17,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:29:17,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... [2020-11-30 02:29:17,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:29:17,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:29:17,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:29:17,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:29:17,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-11-30 02:29:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:29:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-11-30 02:29:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:29:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:29:17,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:29:18,393 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:29:18,393 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:29:18,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:18 BoogieIcfgContainer [2020-11-30 02:29:18,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:29:18,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:29:18,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:29:18,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:29:18,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:29:16" (1/3) ... [2020-11-30 02:29:18,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f25fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:18, skipping insertion in model container [2020-11-30 02:29:18,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:17" (2/3) ... [2020-11-30 02:29:18,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f25fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:18, skipping insertion in model container [2020-11-30 02:29:18,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:18" (3/3) ... [2020-11-30 02:29:18,403 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2020-11-30 02:29:18,414 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:29:18,419 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 02:29:18,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 02:29:18,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:29:18,450 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:29:18,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:29:18,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:29:18,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:29:18,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:29:18,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:29:18,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:29:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-11-30 02:29:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:29:18,469 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:18,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:18,470 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]=== [2020-11-30 02:29:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-11-30 02:29:18,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:18,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439333535] [2020-11-30 02:29:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:29:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:18,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439333535] [2020-11-30 02:29:18,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:18,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:29:18,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910582910] [2020-11-30 02:29:18,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:29:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:29:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:18,720 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-11-30 02:29:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:18,866 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2020-11-30 02:29:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:29:18,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 02:29:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:18,879 INFO L225 Difference]: With dead ends: 106 [2020-11-30 02:29:18,879 INFO L226 Difference]: Without dead ends: 102 [2020-11-30 02:29:18,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-30 02:29:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2020-11-30 02:29:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 02:29:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-11-30 02:29:18,936 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 7 [2020-11-30 02:29:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:18,937 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-11-30 02:29:18,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:29:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-11-30 02:29:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:29:18,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:18,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:19,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:29:19,152 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]=== [2020-11-30 02:29:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-11-30 02:29:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:19,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090991049] [2020-11-30 02:29:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:29:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:19,277 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:29:19,277 INFO L384 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 [2020-11-30 02:29:19,278 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:19,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:19,289 INFO L545 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. [2020-11-30 02:29:19,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:29:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:19,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:19,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090991049] [2020-11-30 02:29:19,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:19,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:29:19,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666622823] [2020-11-30 02:29:19,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:29:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:29:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:19,322 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 3 states. [2020-11-30 02:29:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:19,443 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-11-30 02:29:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:29:19,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 02:29:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:19,447 INFO L225 Difference]: With dead ends: 56 [2020-11-30 02:29:19,447 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 02:29:19,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 02:29:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-30 02:29:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-30 02:29:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-11-30 02:29:19,454 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 7 [2020-11-30 02:29:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:19,454 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-11-30 02:29:19,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:29:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-11-30 02:29:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:29:19,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:19,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:19,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:29:19,671 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]=== [2020-11-30 02:29:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-11-30 02:29:19,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:19,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690815781] [2020-11-30 02:29:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:29:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:19,809 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-11-30 02:29:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:19,820 INFO L384 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 [2020-11-30 02:29:19,821 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:19,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:19,860 INFO L384 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 [2020-11-30 02:29:19,862 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:19,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:19,926 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:19,926 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2020-11-30 02:29:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:20,100 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-11-30 02:29:20,128 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:29:20,139 INFO L384 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 [2020-11-30 02:29:20,141 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:20,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 02:29:20,151 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:20,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:20,171 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:20,171 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2020-11-30 02:29:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:20,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690815781] [2020-11-30 02:29:20,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:20,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:29:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343139715] [2020-11-30 02:29:20,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:29:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:29:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:20,198 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-11-30 02:29:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:20,916 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-11-30 02:29:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:29:20,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 02:29:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:20,919 INFO L225 Difference]: With dead ends: 103 [2020-11-30 02:29:20,919 INFO L226 Difference]: Without dead ends: 103 [2020-11-30 02:29:20,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:29:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-30 02:29:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2020-11-30 02:29:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 02:29:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-11-30 02:29:20,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 7 [2020-11-30 02:29:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:20,935 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-11-30 02:29:20,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:29:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-11-30 02:29:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:20,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:21,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:29:21,161 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]=== [2020-11-30 02:29:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-11-30 02:29:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:21,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529834992] [2020-11-30 02:29:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:29:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 02:29:21,283 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:21,284 INFO L384 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 [2020-11-30 02:29:21,284 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:21,318 INFO L625 ElimStorePlain]: treesize reduction 14, result has 54.8 percent of original size [2020-11-30 02:29:21,319 INFO L545 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. [2020-11-30 02:29:21,319 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:17 [2020-11-30 02:29:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:21,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:21,493 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:21,563 INFO L625 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2020-11-30 02:29:21,566 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-30 02:29:21,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:9 [2020-11-30 02:29:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:21,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529834992] [2020-11-30 02:29:21,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:21,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:29:21,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362935940] [2020-11-30 02:29:21,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:29:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:29:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:29:21,603 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 7 states. [2020-11-30 02:29:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:22,344 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-11-30 02:29:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:29:22,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-11-30 02:29:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:22,347 INFO L225 Difference]: With dead ends: 144 [2020-11-30 02:29:22,348 INFO L226 Difference]: Without dead ends: 144 [2020-11-30 02:29:22,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:29:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-30 02:29:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 64. [2020-11-30 02:29:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-30 02:29:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-11-30 02:29:22,358 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2020-11-30 02:29:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:22,358 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-11-30 02:29:22,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:29:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-11-30 02:29:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:22,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:22,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:22,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 02:29:22,561 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]=== [2020-11-30 02:29:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-11-30 02:29:22,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:22,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793263245] [2020-11-30 02:29:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:29:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:22,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793263245] [2020-11-30 02:29:22,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:22,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:29:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919909112] [2020-11-30 02:29:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:29:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:29:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:22,668 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 6 states. [2020-11-30 02:29:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:22,815 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-11-30 02:29:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:29:22,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 02:29:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:22,819 INFO L225 Difference]: With dead ends: 115 [2020-11-30 02:29:22,819 INFO L226 Difference]: Without dead ends: 115 [2020-11-30 02:29:22,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-30 02:29:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-11-30 02:29:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 02:29:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-11-30 02:29:22,837 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 9 [2020-11-30 02:29:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:22,837 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-11-30 02:29:22,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:29:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-11-30 02:29:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:22,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:22,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:23,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 02:29:23,045 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]=== [2020-11-30 02:29:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-11-30 02:29:23,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:23,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773065002] [2020-11-30 02:29:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:23,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:29:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:23,124 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:29:23,124 INFO L384 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 [2020-11-30 02:29:23,124 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:23,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:23,133 INFO L545 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. [2020-11-30 02:29:23,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:29:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:23,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:23,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773065002] [2020-11-30 02:29:23,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:23,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:29:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951512774] [2020-11-30 02:29:23,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:29:23,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:29:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:23,161 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 3 states. [2020-11-30 02:29:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:23,288 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-11-30 02:29:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:29:23,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 02:29:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:23,290 INFO L225 Difference]: With dead ends: 75 [2020-11-30 02:29:23,290 INFO L226 Difference]: Without dead ends: 75 [2020-11-30 02:29:23,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-30 02:29:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-30 02:29:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 02:29:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-11-30 02:29:23,296 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 9 [2020-11-30 02:29:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:23,296 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-11-30 02:29:23,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:29:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-11-30 02:29:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:23,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:23,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:23,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-30 02:29:23,506 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]=== [2020-11-30 02:29:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-11-30 02:29:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:23,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650965407] [2020-11-30 02:29:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:29:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:23,638 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:23,638 INFO L384 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 [2020-11-30 02:29:23,639 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:23,694 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:29:23,696 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:23,696 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-11-30 02:29:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:23,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650965407] [2020-11-30 02:29:23,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:23,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 02:29:23,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339914424] [2020-11-30 02:29:23,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:29:23,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:29:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:29:23,935 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2020-11-30 02:29:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:24,318 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-11-30 02:29:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:29:24,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-11-30 02:29:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:24,320 INFO L225 Difference]: With dead ends: 119 [2020-11-30 02:29:24,320 INFO L226 Difference]: Without dead ends: 119 [2020-11-30 02:29:24,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:29:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-30 02:29:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2020-11-30 02:29:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:29:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-11-30 02:29:24,326 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 9 [2020-11-30 02:29:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:24,327 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-11-30 02:29:24,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:29:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-11-30 02:29:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:29:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:24,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:24,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 02:29:24,540 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]=== [2020-11-30 02:29:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2020-11-30 02:29:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:24,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787185016] [2020-11-30 02:29:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:29:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:24,641 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:24,642 INFO L384 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 [2020-11-30 02:29:24,642 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:24,679 INFO L625 ElimStorePlain]: treesize reduction 10, result has 71.4 percent of original size [2020-11-30 02:29:24,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:29:24,682 INFO L545 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. [2020-11-30 02:29:24,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:25 [2020-11-30 02:29:24,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:29:24,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:29:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:24,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:24,985 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:25,047 INFO L625 ElimStorePlain]: treesize reduction 14, result has 57.6 percent of original size [2020-11-30 02:29:25,050 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-30 02:29:25,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2020-11-30 02:29:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:25,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787185016] [2020-11-30 02:29:25,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:25,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 02:29:25,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479151967] [2020-11-30 02:29:25,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:29:25,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:29:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:29:25,182 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 10 states. [2020-11-30 02:29:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:26,364 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2020-11-30 02:29:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:29:26,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-11-30 02:29:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:26,367 INFO L225 Difference]: With dead ends: 152 [2020-11-30 02:29:26,367 INFO L226 Difference]: Without dead ends: 152 [2020-11-30 02:29:26,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:29:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-30 02:29:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 68. [2020-11-30 02:29:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-30 02:29:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2020-11-30 02:29:26,378 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 9 [2020-11-30 02:29:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:26,379 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2020-11-30 02:29:26,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:29:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2020-11-30 02:29:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:29:26,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:26,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:26,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-30 02:29:26,584 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]=== [2020-11-30 02:29:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-11-30 02:29:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:26,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100090706] [2020-11-30 02:29:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:29:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:26,664 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:26,665 INFO L384 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 [2020-11-30 02:29:26,665 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:26,693 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-30 02:29:26,696 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:26,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-11-30 02:29:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:26,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:26,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100090706] [2020-11-30 02:29:26,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:26,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:29:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284375493] [2020-11-30 02:29:26,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:29:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:29:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:26,843 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 6 states. [2020-11-30 02:29:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:27,176 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2020-11-30 02:29:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:29:27,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:29:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:27,191 INFO L225 Difference]: With dead ends: 101 [2020-11-30 02:29:27,192 INFO L226 Difference]: Without dead ends: 101 [2020-11-30 02:29:27,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:29:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-30 02:29:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-11-30 02:29:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-30 02:29:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-11-30 02:29:27,196 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2020-11-30 02:29:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:27,196 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-11-30 02:29:27,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:29:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-11-30 02:29:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:29:27,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:27,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:27,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-30 02:29:27,416 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]=== [2020-11-30 02:29:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-11-30 02:29:27,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:27,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114742157] [2020-11-30 02:29:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:29:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:27,516 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_42|]} [2020-11-30 02:29:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:27,526 INFO L384 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 [2020-11-30 02:29:27,527 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:27,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:27,581 INFO L384 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 [2020-11-30 02:29:27,583 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:27,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:27,614 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:27,614 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:29:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:27,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:28,366 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:29:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:28,370 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:28,371 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:28,371 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:29:28,372 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:28,372 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:1 [2020-11-30 02:29:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114742157] [2020-11-30 02:29:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1077637480] [2020-11-30 02:29:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:29:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:29:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:28,480 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_44|]} [2020-11-30 02:29:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:28,488 INFO L384 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 [2020-11-30 02:29:28,488 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:28,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:28,519 INFO L384 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 [2020-11-30 02:29:28,523 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:28,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:28,549 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:28,550 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:29:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:28,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:29,216 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:29:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:29,221 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:29,222 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:29:29,223 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,223 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-11-30 02:29:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:29,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61118560] [2020-11-30 02:29:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:29:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:29,290 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_40|], 1=[|v_#valid_46|]} [2020-11-30 02:29:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:29,296 INFO L384 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 [2020-11-30 02:29:29,296 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:29,336 INFO L384 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 [2020-11-30 02:29:29,337 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:29,357 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,357 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:29:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:29,877 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:29:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:29,887 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:29,889 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:29:29,889 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:29,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:1 [2020-11-30 02:29:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:29,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:29:29,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 6, 6] total 17 [2020-11-30 02:29:29,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11622134] [2020-11-30 02:29:29,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:29:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:29:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:29:29,891 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 18 states. [2020-11-30 02:29:30,667 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-30 02:29:31,037 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-11-30 02:29:31,748 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-30 02:29:32,504 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-30 02:29:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:33,239 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2020-11-30 02:29:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:29:33,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 11 [2020-11-30 02:29:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:33,243 INFO L225 Difference]: With dead ends: 263 [2020-11-30 02:29:33,243 INFO L226 Difference]: Without dead ends: 263 [2020-11-30 02:29:33,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:29:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-30 02:29:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 91. [2020-11-30 02:29:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-30 02:29:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-11-30 02:29:33,253 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 11 [2020-11-30 02:29:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:33,253 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-11-30 02:29:33,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:29:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-11-30 02:29:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:29:33,254 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:33,254 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:33,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3 [2020-11-30 02:29:33,864 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]=== [2020-11-30 02:29:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-11-30 02:29:33,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:33,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755180148] [2020-11-30 02:29:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-30 02:29:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:33,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:29:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:33,958 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:33,958 INFO L384 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 [2020-11-30 02:29:33,958 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,012 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:29:34,014 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,014 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:29:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:34,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755180148] [2020-11-30 02:29:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1721940] [2020-11-30 02:29:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:29:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:29:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:34,691 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:34,692 INFO L384 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 [2020-11-30 02:29:34,692 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,727 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:29:34,729 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:29:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373630198] [2020-11-30 02:29:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:29:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:34,884 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:34,884 INFO L384 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 [2020-11-30 02:29:34,884 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,939 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:29:34,942 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:34,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:29:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:35,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:29:35,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 16 [2020-11-30 02:29:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526522990] [2020-11-30 02:29:35,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:29:35,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:29:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:29:35,863 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 17 states. [2020-11-30 02:29:36,921 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-11-30 02:29:37,106 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-11-30 02:29:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:37,422 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-11-30 02:29:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:29:37,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-11-30 02:29:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:37,426 INFO L225 Difference]: With dead ends: 162 [2020-11-30 02:29:37,426 INFO L226 Difference]: Without dead ends: 162 [2020-11-30 02:29:37,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:29:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-30 02:29:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 88. [2020-11-30 02:29:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-30 02:29:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-11-30 02:29:37,433 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 13 [2020-11-30 02:29:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:37,434 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-11-30 02:29:37,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:29:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-11-30 02:29:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:29:37,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:37,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:38,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:29:38,038 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]=== [2020-11-30 02:29:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash 172810813, now seen corresponding path program 1 times [2020-11-30 02:29:38,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:38,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522344168] [2020-11-30 02:29:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:29:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:38,108 INFO L384 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 [2020-11-30 02:29:38,108 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:38,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:38,124 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:38,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-30 02:29:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:42,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522344168] [2020-11-30 02:29:42,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:42,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-30 02:29:42,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511329431] [2020-11-30 02:29:42,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:29:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:29:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=46, Unknown=2, NotChecked=0, Total=72 [2020-11-30 02:29:42,464 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 9 states. [2020-11-30 02:29:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:52,726 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-11-30 02:29:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:29:52,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-30 02:29:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:52,728 INFO L225 Difference]: With dead ends: 87 [2020-11-30 02:29:52,728 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 02:29:52,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=29, Invalid=59, Unknown=2, NotChecked=0, Total=90 [2020-11-30 02:29:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 02:29:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-30 02:29:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-30 02:29:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-11-30 02:29:52,732 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 14 [2020-11-30 02:29:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:52,732 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-11-30 02:29:52,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:29:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-11-30 02:29:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:29:52,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:52,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:52,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-11-30 02:29:52,934 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]=== [2020-11-30 02:29:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1062175016, now seen corresponding path program 1 times [2020-11-30 02:29:52,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:52,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832312863] [2020-11-30 02:29:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:29:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:53,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:53,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832312863] [2020-11-30 02:29:53,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:53,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:29:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739449874] [2020-11-30 02:29:53,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:29:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:29:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:29:53,047 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 4 states. [2020-11-30 02:29:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:53,188 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-11-30 02:29:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:29:53,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-30 02:29:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:53,191 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:29:53,191 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 02:29:53,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:29:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 02:29:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-30 02:29:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:29:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-11-30 02:29:53,194 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 15 [2020-11-30 02:29:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:53,194 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-11-30 02:29:53,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:29:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-11-30 02:29:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:29:53,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:53,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:53,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-11-30 02:29:53,409 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]=== [2020-11-30 02:29:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1062175017, now seen corresponding path program 1 times [2020-11-30 02:29:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:53,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434917581] [2020-11-30 02:29:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-11-30 02:29:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:29:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:53,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:53,674 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:29:53,716 INFO L384 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 [2020-11-30 02:29:53,717 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:29:53,732 INFO L384 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 [2020-11-30 02:29:53,733 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:29:53,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:53,782 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-30 02:29:53,782 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:25 [2020-11-30 02:29:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:53,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434917581] [2020-11-30 02:29:53,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:53,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 02:29:53,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715213214] [2020-11-30 02:29:53,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:29:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:29:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:29:53,981 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 10 states. [2020-11-30 02:29:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:54,971 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2020-11-30 02:29:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:29:54,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-11-30 02:29:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:54,974 INFO L225 Difference]: With dead ends: 154 [2020-11-30 02:29:54,974 INFO L226 Difference]: Without dead ends: 154 [2020-11-30 02:29:54,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:29:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-30 02:29:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 86. [2020-11-30 02:29:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-30 02:29:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-11-30 02:29:54,978 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 15 [2020-11-30 02:29:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:54,978 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-11-30 02:29:54,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:29:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-11-30 02:29:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:29:54,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:54,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:55,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-11-30 02:29:55,179 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]=== [2020-11-30 02:29:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1432312828, now seen corresponding path program 1 times [2020-11-30 02:29:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:55,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209109699] [2020-11-30 02:29:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-11-30 02:29:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:29:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:55,278 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:29:55,278 INFO L384 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 [2020-11-30 02:29:55,278 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:55,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:55,284 INFO L545 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. [2020-11-30 02:29:55,284 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:29:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:55,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:55,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209109699] [2020-11-30 02:29:55,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:55,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:29:55,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753451668] [2020-11-30 02:29:55,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:29:55,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:55,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:29:55,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:29:55,314 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 4 states. [2020-11-30 02:29:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:55,412 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-11-30 02:29:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:29:55,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-30 02:29:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:55,413 INFO L225 Difference]: With dead ends: 84 [2020-11-30 02:29:55,413 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 02:29:55,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:29:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 02:29:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-30 02:29:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 02:29:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-11-30 02:29:55,417 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 16 [2020-11-30 02:29:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:55,417 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-11-30 02:29:55,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:29:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-11-30 02:29:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:29:55,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:55,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:55,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-11-30 02:29:55,630 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]=== [2020-11-30 02:29:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1432312827, now seen corresponding path program 1 times [2020-11-30 02:29:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:55,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785103662] [2020-11-30 02:29:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:29:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:55,749 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:55,749 INFO L384 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 [2020-11-30 02:29:55,750 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:55,791 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 02:29:55,796 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:55,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 02:29:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:55,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785103662] [2020-11-30 02:29:55,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:55,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 02:29:55,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191148968] [2020-11-30 02:29:55,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:29:55,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:55,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:29:55,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:29:55,979 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 8 states. [2020-11-30 02:29:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:56,592 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-11-30 02:29:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:29:56,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 02:29:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:56,595 INFO L225 Difference]: With dead ends: 133 [2020-11-30 02:29:56,595 INFO L226 Difference]: Without dead ends: 124 [2020-11-30 02:29:56,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:29:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-30 02:29:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2020-11-30 02:29:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 02:29:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-11-30 02:29:56,597 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 16 [2020-11-30 02:29:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:56,598 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-11-30 02:29:56,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:29:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-11-30 02:29:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 02:29:56,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:56,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:56,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-11-30 02:29:56,809 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]=== [2020-11-30 02:29:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1455987438, now seen corresponding path program 1 times [2020-11-30 02:29:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:56,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059601144] [2020-11-30 02:29:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:29:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059601144] [2020-11-30 02:29:56,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:56,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:29:56,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705890531] [2020-11-30 02:29:56,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:29:56,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:29:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:56,880 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 3 states. [2020-11-30 02:29:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:56,891 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-11-30 02:29:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:29:56,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-30 02:29:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:56,892 INFO L225 Difference]: With dead ends: 82 [2020-11-30 02:29:56,892 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 02:29:56,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 02:29:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-30 02:29:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:29:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-11-30 02:29:56,895 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 20 [2020-11-30 02:29:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:56,895 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-11-30 02:29:56,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:29:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-11-30 02:29:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 02:29:56,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:56,897 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] [2020-11-30 02:29:57,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-11-30 02:29:57,101 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]=== [2020-11-30 02:29:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 420786095, now seen corresponding path program 1 times [2020-11-30 02:29:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:57,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127576688] [2020-11-30 02:29:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:29:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:57,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127576688] [2020-11-30 02:29:57,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:57,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:29:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558949210] [2020-11-30 02:29:57,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:29:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:29:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:29:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:57,204 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 3 states. [2020-11-30 02:29:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:57,220 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-11-30 02:29:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:29:57,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-30 02:29:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:57,222 INFO L225 Difference]: With dead ends: 82 [2020-11-30 02:29:57,222 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 02:29:57,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:29:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 02:29:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-30 02:29:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:29:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-11-30 02:29:57,225 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 23 [2020-11-30 02:29:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:57,225 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-11-30 02:29:57,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:29:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-11-30 02:29:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 02:29:57,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:57,226 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:57,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-11-30 02:29:57,434 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]=== [2020-11-30 02:29:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash -591263241, now seen corresponding path program 2 times [2020-11-30 02:29:57,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:29:57,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556759481] [2020-11-30 02:29:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:29:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:29:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:29:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:29:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:57,532 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_53|], 1=[|v_#valid_60|]} [2020-11-30 02:29:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:57,541 INFO L384 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 [2020-11-30 02:29:57,541 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:57,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:57,568 INFO L384 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 [2020-11-30 02:29:57,568 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:57,588 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:57,589 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:57,590 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:29:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:59,168 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:29:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:59,174 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:59,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:59,175 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:29:59,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:59,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-11-30 02:29:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:59,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556759481] [2020-11-30 02:29:59,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821715926] [2020-11-30 02:29:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:29:59,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:29:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:29:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:29:59,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:59,353 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_55|], 1=[|v_#valid_62|]} [2020-11-30 02:29:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:29:59,360 INFO L384 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 [2020-11-30 02:29:59,360 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:59,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:59,388 INFO L384 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 [2020-11-30 02:29:59,389 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:29:59,409 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:29:59,417 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:29:59,418 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:29:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:30:02,110 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:30:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:30:02,115 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:02,130 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:30:02,130 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:1 [2020-11-30 02:30:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:30:02,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633893590] [2020-11-30 02:30:02,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:30:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:30:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:30:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:30:02,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:30:02,208 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_57|], 1=[|v_#valid_64|]} [2020-11-30 02:30:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:30:02,219 INFO L384 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 [2020-11-30 02:30:02,220 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:02,260 INFO L384 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 [2020-11-30 02:30:02,262 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,291 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:02,293 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,293 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:30:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:30:02,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:30:02,317 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:30:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:30:02,324 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,326 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:02,326 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:30:02,326 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:30:02,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-11-30 02:30:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:30:02,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:30:02,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9, 9, 8] total 29 [2020-11-30 02:30:02,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677436774] [2020-11-30 02:30:02,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:30:02,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:30:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:30:02,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-11-30 02:30:02,335 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 30 states. [2020-11-30 02:30:06,215 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-11-30 02:30:08,237 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-30 02:30:12,110 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-11-30 02:30:14,276 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-11-30 02:30:15,454 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-30 02:30:18,851 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-11-30 02:30:20,558 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-11-30 02:30:21,198 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-11-30 02:30:24,162 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-30 02:30:25,378 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-30 02:30:25,976 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-11-30 02:30:27,756 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-11-30 02:30:29,198 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-30 02:30:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:30:31,058 INFO L93 Difference]: Finished difference Result 459 states and 496 transitions. [2020-11-30 02:30:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-30 02:30:31,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2020-11-30 02:30:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:30:31,063 INFO L225 Difference]: With dead ends: 459 [2020-11-30 02:30:31,063 INFO L226 Difference]: Without dead ends: 459 [2020-11-30 02:30:31,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 02:30:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-11-30 02:30:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 129. [2020-11-30 02:30:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-30 02:30:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-11-30 02:30:31,071 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 23 [2020-11-30 02:30:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:30:31,071 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-11-30 02:30:31,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:30:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-11-30 02:30:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 02:30:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:30:31,072 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] [2020-11-30 02:30:31,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 cvc4 --incremental --print-success --lang smt --rewrite-divk,24 mathsat -unsat_core_generation=3 [2020-11-30 02:30:31,673 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]=== [2020-11-30 02:30:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:30:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2103285548, now seen corresponding path program 1 times [2020-11-30 02:30:31,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:30:31,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588990632] [2020-11-30 02:30:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:30:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:30:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:30:31,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:30:31,792 INFO L384 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 [2020-11-30 02:30:31,792 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:30:31,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:31,800 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:30:31,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2020-11-30 02:30:31,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:30:32,041 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:32,041 INFO L384 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 [2020-11-30 02:30:32,042 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 02:30:32,043 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 02:30:32,044 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:30:32,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:30:32,065 INFO L545 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. [2020-11-30 02:30:32,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:13 [2020-11-30 02:30:32,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:30:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:30:32,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:30:32,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588990632] [2020-11-30 02:30:32,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 02:30:32,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303443379] [2020-11-30 02:30:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:30:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:30:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 02:30:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:30:32,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@79abe16d [2020-11-30 02:30:32,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481962289] [2020-11-30 02:30:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8115fdc4-ea3b-44a2-a419-36a2650675b3/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 [2020-11-30 02:30:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:30:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:30:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:30:32,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@79abe16d [2020-11-30 02:30:32,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:30:32,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-30 02:30:32,634 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-11-30 02:30:32,634 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:30:33,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 mathsat -unsat_core_generation=3,28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:30:33,256 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-30 02:30:33,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:30:33 BoogieIcfgContainer [2020-11-30 02:30:33,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:30:33,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:30:33,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:30:33,258 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:30:33,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:18" (3/4) ... [2020-11-30 02:30:33,262 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:30:33,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:30:33,263 INFO L168 Benchmark]: Toolchain (without parser) took 76306.38 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 49.0 MB in the beginning and 72.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,264 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 83.9 MB. Free memory was 66.8 MB in the beginning and 66.6 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:30:33,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.47 ms. Allocated memory is still 83.9 MB. Free memory was 48.8 MB in the beginning and 56.3 MB in the end (delta: -7.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,264 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.30 ms. Allocated memory is still 83.9 MB. Free memory was 56.3 MB in the beginning and 54.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,265 INFO L168 Benchmark]: Boogie Preprocessor took 43.05 ms. Allocated memory is still 83.9 MB. Free memory was 54.3 MB in the beginning and 52.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,265 INFO L168 Benchmark]: RCFGBuilder took 723.43 ms. Allocated memory is still 83.9 MB. Free memory was 52.4 MB in the beginning and 59.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,266 INFO L168 Benchmark]: TraceAbstraction took 74860.60 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 59.5 MB in the beginning and 72.8 MB in the end (delta: -13.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:30:33,266 INFO L168 Benchmark]: Witness Printer took 4.75 ms. Allocated memory is still 107.0 MB. Free memory was 72.8 MB in the beginning and 72.2 MB in the end (delta: 593.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:30:33,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 83.9 MB. Free memory was 66.8 MB in the beginning and 66.6 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 605.47 ms. Allocated memory is still 83.9 MB. Free memory was 48.8 MB in the beginning and 56.3 MB in the end (delta: -7.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.30 ms. Allocated memory is still 83.9 MB. Free memory was 56.3 MB in the beginning and 54.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.05 ms. Allocated memory is still 83.9 MB. Free memory was 54.3 MB in the beginning and 52.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 723.43 ms. Allocated memory is still 83.9 MB. Free memory was 52.4 MB in the beginning and 59.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 74860.60 ms. Allocated memory was 83.9 MB in the beginning and 107.0 MB in the end (delta: 23.1 MB). Free memory was 59.5 MB in the beginning and 72.8 MB in the end (delta: -13.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.75 ms. Allocated memory is still 107.0 MB. Free memory was 72.8 MB in the beginning and 72.2 MB in the end (delta: 593.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 519]: 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: [L530] int length1 = __VERIFIER_nondet_int(); [L531] int length2 = __VERIFIER_nondet_int(); [L532] COND TRUE length1 < 1 [L533] length1 = 1 [L535] COND TRUE length2 < 1 [L536] length2 = 1 [L538] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); [L539] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); [L541] int i = 0; [L541] COND FALSE !(i < length1 - 1) [L546] int i = 0; [L546] COND FALSE !(i < length2 - 1) [L551] nondetString1[length1-1] = '\0' [L552] nondetString2[length2-1] = '\0' [L516] unsigned char uc1, uc2; [L517] COND FALSE !(n == 0) [L519] EXPR n-- [L519] n-- > 0 && *s1 == *s2 [L519] EXPR \read(*s1) [L519] EXPR \read(*s2) [L519] n-- > 0 && *s1 == *s2 [L519] COND TRUE n-- > 0 && *s1 == *s2 [L520] n == 0 || *s1 == '\0' [L520] EXPR \read(*s1) [L520] n == 0 || *s1 == '\0' [L520] COND FALSE !(n == 0 || *s1 == '\0') [L522] s1++ [L523] s2++ [L519] EXPR n-- [L519] n-- > 0 && *s1 == *s2 [L519] \read(*s1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 57 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 74.7s, OverallIterations: 20, TraceHistogramMax: 5, AutomataDifference: 49.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 852 SDtfs, 6576 SDslu, 2638 SDs, 0 SdLazy, 2329 SolverSat, 167 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 26.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 682 GetRequests, 488 SyntacticMatches, 11 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 34.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=19, 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, 19 MinimizatonAttempts, 1049 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 622 ConstructedInterpolants, 11 QuantifiedInterpolants, 108272 SizeOfPredicates, 140 NumberOfNonLiveVariables, 1111 ConjunctsInSsa, 193 ConjunctsInUnsatCore, 50 InterpolantComputations, 32 PerfectInterpolantSequences, 10/226 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...