./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/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 e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 17:14:21,576 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 17:14:21,577 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 17:14:21,582 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 17:14:21,583 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 17:14:21,583 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 17:14:21,584 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 17:14:21,585 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 17:14:21,586 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 17:14:21,586 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 17:14:21,587 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 17:14:21,587 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 17:14:21,587 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 17:14:21,588 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 17:14:21,588 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 17:14:21,589 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 17:14:21,589 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 17:14:21,590 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 17:14:21,591 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 17:14:21,592 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 17:14:21,592 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 17:14:21,593 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 17:14:21,594 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 17:14:21,594 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 17:14:21,594 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 17:14:21,595 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 17:14:21,595 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 17:14:21,596 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 17:14:21,596 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 17:14:21,597 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 17:14:21,597 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 17:14:21,597 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 17:14:21,597 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 17:14:21,597 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 17:14:21,598 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 17:14:21,598 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 17:14:21,599 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 17:14:21,606 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 17:14:21,606 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 17:14:21,607 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 17:14:21,607 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 17:14:21,607 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 17:14:21,607 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 17:14:21,607 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 17:14:21,607 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 17:14:21,607 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 17:14:21,608 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 17:14:21,608 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 17:14:21,608 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 17:14:21,609 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 17:14:21,609 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 17:14:21,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 17:14:21,610 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/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 -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2018-12-09 17:14:21,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 17:14:21,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 17:14:21,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 17:14:21,637 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 17:14:21,637 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 17:14:21,637 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers2_false-valid-deref.c [2018-12-09 17:14:21,671 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/data/78d0bd95d/f8dd46f5a5934a5cb843f569a0640e63/FLAGf7c4c3b28 [2018-12-09 17:14:22,108 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 17:14:22,109 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/sv-benchmarks/c/memsafety-ext3/getNumbers2_false-valid-deref.c [2018-12-09 17:14:22,112 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/data/78d0bd95d/f8dd46f5a5934a5cb843f569a0640e63/FLAGf7c4c3b28 [2018-12-09 17:14:22,120 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/data/78d0bd95d/f8dd46f5a5934a5cb843f569a0640e63 [2018-12-09 17:14:22,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 17:14:22,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 17:14:22,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 17:14:22,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 17:14:22,125 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 17:14:22,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409ee820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22, skipping insertion in model container [2018-12-09 17:14:22,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 17:14:22,139 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 17:14:22,223 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:14:22,230 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 17:14:22,240 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:14:22,250 INFO L195 MainTranslator]: Completed translation [2018-12-09 17:14:22,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22 WrapperNode [2018-12-09 17:14:22,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 17:14:22,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 17:14:22,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 17:14:22,250 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 17:14:22,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 17:14:22,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 17:14:22,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 17:14:22,264 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 17:14:22,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... [2018-12-09 17:14:22,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 17:14:22,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 17:14:22,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 17:14:22,310 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 17:14:22,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/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 [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 17:14:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers2 [2018-12-09 17:14:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers2 [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 17:14:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 17:14:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 17:14:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 17:14:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2018-12-09 17:14:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers [2018-12-09 17:14:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers [2018-12-09 17:14:22,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 17:14:22,472 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 17:14:22,472 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 17:14:22,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:14:22 BoogieIcfgContainer [2018-12-09 17:14:22,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 17:14:22,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 17:14:22,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 17:14:22,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 17:14:22,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:14:22" (1/3) ... [2018-12-09 17:14:22,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102fb507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:14:22, skipping insertion in model container [2018-12-09 17:14:22,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:14:22" (2/3) ... [2018-12-09 17:14:22,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102fb507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:14:22, skipping insertion in model container [2018-12-09 17:14:22,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:14:22" (3/3) ... [2018-12-09 17:14:22,480 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers2_false-valid-deref.c [2018-12-09 17:14:22,488 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 17:14:22,494 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 17:14:22,510 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 17:14:22,526 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 17:14:22,526 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 17:14:22,527 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 17:14:22,527 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 17:14:22,527 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 17:14:22,527 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 17:14:22,527 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 17:14:22,527 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 17:14:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-09 17:14:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 17:14:22,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:22,542 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:22,543 INFO L423 AbstractCegarLoop]: === Iteration 1 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:22,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -262167437, now seen corresponding path program 1 times [2018-12-09 17:14:22,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:22,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:22,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,576 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:22,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:14:22,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 17:14:22,717 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:22,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 17:14:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 17:14:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 17:14:22,729 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2018-12-09 17:14:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:22,795 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-09 17:14:22,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 17:14:22,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-09 17:14:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:22,802 INFO L225 Difference]: With dead ends: 43 [2018-12-09 17:14:22,802 INFO L226 Difference]: Without dead ends: 40 [2018-12-09 17:14:22,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 17:14:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-09 17:14:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-12-09 17:14:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-09 17:14:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-12-09 17:14:22,825 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 10 [2018-12-09 17:14:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:22,825 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-12-09 17:14:22,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 17:14:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-12-09 17:14:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 17:14:22,826 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:22,826 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:22,826 INFO L423 AbstractCegarLoop]: === Iteration 2 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:22,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -262167438, now seen corresponding path program 1 times [2018-12-09 17:14:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:22,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,828 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:22,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:14:22,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 17:14:22,851 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 17:14:22,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 17:14:22,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 17:14:22,852 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2018-12-09 17:14:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:22,868 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-09 17:14:22,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 17:14:22,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 17:14:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:22,869 INFO L225 Difference]: With dead ends: 37 [2018-12-09 17:14:22,869 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 17:14:22,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 17:14:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 17:14:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-09 17:14:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 17:14:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-12-09 17:14:22,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 10 [2018-12-09 17:14:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:22,873 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-12-09 17:14:22,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 17:14:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-12-09 17:14:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 17:14:22,873 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:22,873 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:22,874 INFO L423 AbstractCegarLoop]: === Iteration 3 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:22,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1979581628, now seen corresponding path program 1 times [2018-12-09 17:14:22,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:22,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:22,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:22,875 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:22,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:22,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:22,957 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 17:14:22,958 INFO L205 CegarAbsIntRunner]: [0], [1], [37], [45], [46], [48], [50], [56], [58], [59], [60], [62] [2018-12-09 17:14:22,978 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:14:22,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:14:23,074 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:14:23,074 INFO L272 AbstractInterpreter]: Visited 12 different actions 20 times. Merged at 4 different actions 8 times. Never widened. Performed 155 root evaluator evaluations with a maximum evaluation depth of 4. Performed 155 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 16 variables. [2018-12-09 17:14:23,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:23,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:14:23,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:23,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:23,087 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:23,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:23,126 INFO L478 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 [2018-12-09 17:14:23,127 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:23,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 17:14:23,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 17:14:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:23,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2018-12-09 17:14:23,228 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:23,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 17:14:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 17:14:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-12-09 17:14:23,228 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2018-12-09 17:14:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:23,298 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-12-09 17:14:23,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:14:23,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-12-09 17:14:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:23,299 INFO L225 Difference]: With dead ends: 41 [2018-12-09 17:14:23,299 INFO L226 Difference]: Without dead ends: 41 [2018-12-09 17:14:23,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-12-09 17:14:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-09 17:14:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-09 17:14:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 17:14:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-09 17:14:23,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 13 [2018-12-09 17:14:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:23,302 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-09 17:14:23,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 17:14:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-09 17:14:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 17:14:23,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:23,303 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:23,303 INFO L423 AbstractCegarLoop]: === Iteration 4 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:23,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 974975319, now seen corresponding path program 1 times [2018-12-09 17:14:23,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:23,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:23,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,304 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,344 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:23,344 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-12-09 17:14:23,344 INFO L205 CegarAbsIntRunner]: [0], [1], [3], [11], [13], [37], [43], [45], [46], [50], [54], [55], [56], [57], [58], [59], [60], [62] [2018-12-09 17:14:23,345 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:14:23,346 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:14:23,392 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:14:23,392 INFO L272 AbstractInterpreter]: Visited 18 different actions 30 times. Merged at 3 different actions 9 times. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 4. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 21 variables. [2018-12-09 17:14:23,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:23,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:14:23,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,394 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:23,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:23,400 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:23,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:23,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-09 17:14:23,493 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:23,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 17:14:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 17:14:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:14:23,493 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 7 states. [2018-12-09 17:14:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:23,511 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-09 17:14:23,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 17:14:23,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-12-09 17:14:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:23,512 INFO L225 Difference]: With dead ends: 46 [2018-12-09 17:14:23,512 INFO L226 Difference]: Without dead ends: 46 [2018-12-09 17:14:23,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:14:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-09 17:14:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2018-12-09 17:14:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 17:14:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-09 17:14:23,517 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 24 [2018-12-09 17:14:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:23,517 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-09 17:14:23,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 17:14:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-09 17:14:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 17:14:23,518 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:23,518 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:23,518 INFO L423 AbstractCegarLoop]: === Iteration 5 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:23,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1645381224, now seen corresponding path program 2 times [2018-12-09 17:14:23,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:23,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:23,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:23,564 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:23,564 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:23,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,565 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:23,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:23,571 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:23,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 17:14:23,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:23,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:23,586 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-09 17:14:23,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 15 [2018-12-09 17:14:23,596 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-09 17:14:23,602 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-09 17:14:23,608 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-09 17:14:23,608 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:9, output treesize:21 [2018-12-09 17:14:23,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 34 [2018-12-09 17:14:23,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-09 17:14:23,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:23,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 24 [2018-12-09 17:14:23,692 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:23,707 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-12-09 17:14:23,707 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:54 [2018-12-09 17:14:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 17:14:23,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 17:14:23,838 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 17:14:23,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 15 [2018-12-09 17:14:23,838 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:23,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 17:14:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 17:14:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-12-09 17:14:23,839 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2018-12-09 17:14:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:23,931 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-09 17:14:23,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 17:14:23,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-09 17:14:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:23,932 INFO L225 Difference]: With dead ends: 43 [2018-12-09 17:14:23,932 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 17:14:23,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-12-09 17:14:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 17:14:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-09 17:14:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-09 17:14:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-12-09 17:14:23,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 27 [2018-12-09 17:14:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:23,934 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-12-09 17:14:23,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 17:14:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-12-09 17:14:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 17:14:23,935 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:23,935 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:23,935 INFO L423 AbstractCegarLoop]: === Iteration 6 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:23,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1645381225, now seen corresponding path program 1 times [2018-12-09 17:14:23,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:23,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:23,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:23,936 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:23,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:23,969 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:23,969 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-12-09 17:14:23,969 INFO L205 CegarAbsIntRunner]: [0], [1], [3], [11], [14], [37], [43], [45], [46], [50], [54], [55], [56], [57], [58], [59], [60], [62] [2018-12-09 17:14:23,970 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:14:23,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:14:24,005 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:14:24,005 INFO L272 AbstractInterpreter]: Visited 18 different actions 37 times. Merged at 6 different actions 15 times. Widened at 1 different actions 1 times. Performed 233 root evaluator evaluations with a maximum evaluation depth of 4. Performed 233 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 3 fixpoints after 3 different actions. Largest state had 21 variables. [2018-12-09 17:14:24,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:24,007 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:14:24,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:24,007 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:24,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:24,015 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:24,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:24,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:24,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:24,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 17:14:24,098 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:24,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 17:14:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 17:14:24,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:24,107 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 8 states. [2018-12-09 17:14:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:24,129 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-09 17:14:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:14:24,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-09 17:14:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:24,130 INFO L225 Difference]: With dead ends: 48 [2018-12-09 17:14:24,130 INFO L226 Difference]: Without dead ends: 48 [2018-12-09 17:14:24,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-09 17:14:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-12-09 17:14:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 17:14:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-12-09 17:14:24,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 27 [2018-12-09 17:14:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:24,134 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-12-09 17:14:24,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 17:14:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-12-09 17:14:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-09 17:14:24,134 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:24,134 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:24,135 INFO L423 AbstractCegarLoop]: === Iteration 7 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:24,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2109770680, now seen corresponding path program 2 times [2018-12-09 17:14:24,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:24,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:24,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:24,136 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:24,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:24,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:24,179 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:24,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:24,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:24,179 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:24,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:24,185 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:24,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 17:14:24,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:24,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:24,199 INFO L478 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 [2018-12-09 17:14:24,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:24,211 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-09 17:14:24,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 15 [2018-12-09 17:14:24,222 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-12-09 17:14:24,228 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-09 17:14:24,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-09 17:14:24,236 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:19, output treesize:37 [2018-12-09 17:14:24,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 33 treesize of output 36 [2018-12-09 17:14:24,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:24,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2018-12-09 17:14:24,309 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:24,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 25 treesize of output 24 [2018-12-09 17:14:24,324 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:24,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 17:14:24,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2018-12-09 17:14:24,341 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:24,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-12-09 17:14:24,355 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:65, output treesize:50 [2018-12-09 17:14:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-09 17:14:24,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:24,490 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2018-12-09 17:14:26,056 WARN L180 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2018-12-09 17:14:26,064 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-12-09 17:14:26,123 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2018-12-09 17:14:26,170 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5544 conjuctions. This might take some time... [2018-12-09 17:14:26,228 INFO L193 XnfTransformerHelper]: Simplified to disjunction of 18 conjuctions. [2018-12-09 17:14:26,231 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-12-09 17:14:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-09 17:14:26,308 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 17:14:26,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 18 [2018-12-09 17:14:26,309 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:26,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 17:14:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 17:14:26,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-12-09 17:14:26,310 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2018-12-09 17:14:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:26,469 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-09 17:14:26,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 17:14:26,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-12-09 17:14:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:26,471 INFO L225 Difference]: With dead ends: 46 [2018-12-09 17:14:26,471 INFO L226 Difference]: Without dead ends: 46 [2018-12-09 17:14:26,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-12-09 17:14:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-09 17:14:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-09 17:14:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 17:14:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-12-09 17:14:26,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 30 [2018-12-09 17:14:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-12-09 17:14:26,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 17:14:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-12-09 17:14:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 17:14:26,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:26,475 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:26,476 INFO L423 AbstractCegarLoop]: === Iteration 8 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:26,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash 978381594, now seen corresponding path program 1 times [2018-12-09 17:14:26,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:26,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:26,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,477 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-09 17:14:26,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:14:26,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 17:14:26,497 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:26,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 17:14:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 17:14:26,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 17:14:26,497 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 3 states. [2018-12-09 17:14:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:26,508 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-09 17:14:26,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 17:14:26,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-12-09 17:14:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:26,509 INFO L225 Difference]: With dead ends: 45 [2018-12-09 17:14:26,509 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 17:14:26,509 INFO L631 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 [2018-12-09 17:14:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 17:14:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-09 17:14:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 17:14:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-09 17:14:26,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 31 [2018-12-09 17:14:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:26,512 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-09 17:14:26,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 17:14:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-09 17:14:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 17:14:26,513 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:26,513 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:26,513 INFO L423 AbstractCegarLoop]: === Iteration 9 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:26,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash 978381595, now seen corresponding path program 1 times [2018-12-09 17:14:26,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:26,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:26,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:26,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,563 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:26,563 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-12-09 17:14:26,563 INFO L205 CegarAbsIntRunner]: [0], [1], [3], [11], [12], [17], [37], [43], [45], [46], [50], [54], [55], [56], [57], [58], [59], [60], [62] [2018-12-09 17:14:26,564 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:14:26,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:14:26,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:14:26,589 INFO L272 AbstractInterpreter]: Visited 19 different actions 38 times. Merged at 6 different actions 15 times. Widened at 1 different actions 1 times. Performed 241 root evaluator evaluations with a maximum evaluation depth of 4. Performed 241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 3 fixpoints after 3 different actions. Largest state had 22 variables. [2018-12-09 17:14:26,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,591 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:14:26,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:26,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:26,599 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:26,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:26,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:26,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:26,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2018-12-09 17:14:26,676 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:26,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 17:14:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 17:14:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:26,677 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 9 states. [2018-12-09 17:14:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:26,696 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-12-09 17:14:26,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 17:14:26,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-12-09 17:14:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:26,696 INFO L225 Difference]: With dead ends: 50 [2018-12-09 17:14:26,696 INFO L226 Difference]: Without dead ends: 50 [2018-12-09 17:14:26,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-09 17:14:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-12-09 17:14:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 17:14:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-09 17:14:26,699 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 31 [2018-12-09 17:14:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:26,699 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-09 17:14:26,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 17:14:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-09 17:14:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 17:14:26,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:26,699 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:26,699 INFO L423 AbstractCegarLoop]: === Iteration 10 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:26,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash 432910570, now seen corresponding path program 2 times [2018-12-09 17:14:26,700 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:26,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:26,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,700 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:14:26,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,755 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:26,755 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:26,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:26,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,756 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:26,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:26,762 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:26,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 17:14:26,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:26,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:26,778 INFO L478 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 [2018-12-09 17:14:26,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 17:14:26,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 17:14:26,782 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-12-09 17:14:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-09 17:14:26,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-09 17:14:26,870 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 17:14:26,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 13 [2018-12-09 17:14:26,870 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:14:26,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 17:14:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 17:14:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:26,871 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 4 states. [2018-12-09 17:14:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:26,885 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-12-09 17:14:26,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 17:14:26,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-12-09 17:14:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:26,886 INFO L225 Difference]: With dead ends: 47 [2018-12-09 17:14:26,886 INFO L226 Difference]: Without dead ends: 47 [2018-12-09 17:14:26,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-09 17:14:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-09 17:14:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-09 17:14:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-09 17:14:26,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 34 [2018-12-09 17:14:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:26,888 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-09 17:14:26,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 17:14:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-09 17:14:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 17:14:26,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:26,888 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:26,889 INFO L423 AbstractCegarLoop]: === Iteration 11 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:26,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -408014623, now seen corresponding path program 1 times [2018-12-09 17:14:26,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:26,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:26,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:26,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 17:14:26,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,928 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:26,928 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-12-09 17:14:26,928 INFO L205 CegarAbsIntRunner]: [0], [1], [3], [9], [11], [12], [15], [18], [20], [24], [25], [30], [32], [37], [43], [45], [46], [50], [54], [55], [56], [57], [58], [59], [60], [62], [63] [2018-12-09 17:14:26,929 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:14:26,929 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:14:26,975 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:14:26,975 INFO L272 AbstractInterpreter]: Visited 27 different actions 66 times. Merged at 11 different actions 32 times. Widened at 1 different actions 1 times. Performed 388 root evaluator evaluations with a maximum evaluation depth of 4. Performed 388 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 5 different actions. Largest state had 25 variables. [2018-12-09 17:14:26,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:26,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:14:26,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:26,977 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:26,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:26,985 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 17:14:27,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 17:14:27,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2018-12-09 17:14:27,086 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 17:14:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 17:14:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,087 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2018-12-09 17:14:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,124 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-09 17:14:27,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 17:14:27,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-12-09 17:14:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,125 INFO L225 Difference]: With dead ends: 52 [2018-12-09 17:14:27,125 INFO L226 Difference]: Without dead ends: 52 [2018-12-09 17:14:27,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-09 17:14:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2018-12-09 17:14:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 17:14:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-09 17:14:27,129 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 42 [2018-12-09 17:14:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,129 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-09 17:14:27,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 17:14:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-09 17:14:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 17:14:27,130 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,130 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,130 INFO L423 AbstractCegarLoop]: === Iteration 12 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1348926542, now seen corresponding path program 2 times [2018-12-09 17:14:27,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:27,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,131 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 17:14:27,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,190 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:27,190 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:27,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:27,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,190 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:27,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:27,197 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:27,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 17:14:27,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:27,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-09 17:14:27,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-09 17:14:27,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2018-12-09 17:14:27,265 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 17:14:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 17:14:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-09 17:14:27,266 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 12 states. [2018-12-09 17:14:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,316 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-12-09 17:14:27,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 17:14:27,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-09 17:14:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,316 INFO L225 Difference]: With dead ends: 64 [2018-12-09 17:14:27,316 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 17:14:27,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-09 17:14:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 17:14:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2018-12-09 17:14:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 17:14:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-12-09 17:14:27,319 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 45 [2018-12-09 17:14:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,319 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-12-09 17:14:27,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 17:14:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-12-09 17:14:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-09 17:14:27,319 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,319 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,319 INFO L423 AbstractCegarLoop]: === Iteration 13 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1432258301, now seen corresponding path program 3 times [2018-12-09 17:14:27,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:27,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,320 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,383 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:27,383 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:27,383 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:27,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,383 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:27,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:14:27,391 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:14:27,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:14:27,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:27,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2018-12-09 17:14:27,494 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 17:14:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 17:14:27,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,495 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 12 states. [2018-12-09 17:14:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,517 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-09 17:14:27,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 17:14:27,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2018-12-09 17:14:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,518 INFO L225 Difference]: With dead ends: 63 [2018-12-09 17:14:27,518 INFO L226 Difference]: Without dead ends: 63 [2018-12-09 17:14:27,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-09 17:14:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2018-12-09 17:14:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 17:14:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-12-09 17:14:27,521 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 53 [2018-12-09 17:14:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,521 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-12-09 17:14:27,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 17:14:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-12-09 17:14:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 17:14:27,521 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,522 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,522 INFO L423 AbstractCegarLoop]: === Iteration 14 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1491367820, now seen corresponding path program 4 times [2018-12-09 17:14:27,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:27,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:27,591 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:27,591 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:27,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,591 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:27,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:27,597 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 17:14:27,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2018-12-09 17:14:27,688 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 17:14:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 17:14:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,689 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 13 states. [2018-12-09 17:14:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,712 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-12-09 17:14:27,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 17:14:27,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2018-12-09 17:14:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,712 INFO L225 Difference]: With dead ends: 64 [2018-12-09 17:14:27,713 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 17:14:27,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 17:14:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 17:14:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 17:14:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-12-09 17:14:27,715 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 56 [2018-12-09 17:14:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,716 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-12-09 17:14:27,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 17:14:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-12-09 17:14:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-09 17:14:27,716 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,717 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,717 INFO L423 AbstractCegarLoop]: === Iteration 15 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1486456989, now seen corresponding path program 5 times [2018-12-09 17:14:27,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:27,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,718 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:27,740 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:27,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:27,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:27,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:27,746 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:27,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 17:14:27,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:27,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-09 17:14:27,810 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 17:14:27,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 17:14:27,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 17:14:27,811 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 6 states. [2018-12-09 17:14:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,827 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-12-09 17:14:27,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 17:14:27,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2018-12-09 17:14:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,828 INFO L225 Difference]: With dead ends: 73 [2018-12-09 17:14:27,828 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 17:14:27,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 17:14:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 17:14:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-12-09 17:14:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-09 17:14:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-12-09 17:14:27,830 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 59 [2018-12-09 17:14:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,831 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-12-09 17:14:27,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 17:14:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-12-09 17:14:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-09 17:14:27,831 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,831 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,832 INFO L423 AbstractCegarLoop]: === Iteration 16 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1338250463, now seen corresponding path program 6 times [2018-12-09 17:14:27,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:27,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,833 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:27,861 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:27,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:27,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:27,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:27,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:14:27,867 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:14:27,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:14:27,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:27,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:27,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:27,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-09 17:14:27,973 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:27,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 17:14:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 17:14:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:14:27,974 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 7 states. [2018-12-09 17:14:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:27,988 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-12-09 17:14:27,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 17:14:27,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2018-12-09 17:14:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:27,989 INFO L225 Difference]: With dead ends: 78 [2018-12-09 17:14:27,989 INFO L226 Difference]: Without dead ends: 78 [2018-12-09 17:14:27,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:14:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-09 17:14:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-12-09 17:14:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-09 17:14:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-12-09 17:14:27,991 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 64 [2018-12-09 17:14:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:27,991 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-12-09 17:14:27,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 17:14:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-12-09 17:14:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 17:14:27,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:27,991 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:27,991 INFO L423 AbstractCegarLoop]: === Iteration 17 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:27,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash -368674019, now seen corresponding path program 7 times [2018-12-09 17:14:27,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:27,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:27,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:27,992 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,017 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:28,017 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:28,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:28,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,017 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:28,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:28,023 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:28,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 17:14:28,106 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:28,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 17:14:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 17:14:28,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,107 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 8 states. [2018-12-09 17:14:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:28,123 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-12-09 17:14:28,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:14:28,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2018-12-09 17:14:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:28,124 INFO L225 Difference]: With dead ends: 83 [2018-12-09 17:14:28,124 INFO L226 Difference]: Without dead ends: 83 [2018-12-09 17:14:28,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-09 17:14:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-12-09 17:14:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-09 17:14:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-12-09 17:14:28,125 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2018-12-09 17:14:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:28,126 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-12-09 17:14:28,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 17:14:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-12-09 17:14:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-09 17:14:28,126 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:28,126 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:28,126 INFO L423 AbstractCegarLoop]: === Iteration 18 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:28,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash -243103583, now seen corresponding path program 8 times [2018-12-09 17:14:28,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:28,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:28,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,127 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,157 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:28,157 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:28,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:28,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:28,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:28,168 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:28,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 17:14:28,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:28,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:28,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2018-12-09 17:14:28,268 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:28,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 17:14:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 17:14:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,269 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 9 states. [2018-12-09 17:14:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:28,291 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-12-09 17:14:28,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 17:14:28,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2018-12-09 17:14:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:28,291 INFO L225 Difference]: With dead ends: 88 [2018-12-09 17:14:28,291 INFO L226 Difference]: Without dead ends: 88 [2018-12-09 17:14:28,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-09 17:14:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-12-09 17:14:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-09 17:14:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-12-09 17:14:28,294 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 74 [2018-12-09 17:14:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:28,295 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-12-09 17:14:28,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 17:14:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-12-09 17:14:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-09 17:14:28,296 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:28,296 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:28,296 INFO L423 AbstractCegarLoop]: === Iteration 19 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:28,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1204178333, now seen corresponding path program 9 times [2018-12-09 17:14:28,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:28,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:28,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,297 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,355 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:28,355 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:28,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:28,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,355 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:28,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:14:28,361 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:14:28,489 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:14:28,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:28,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:28,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2018-12-09 17:14:28,572 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:28,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 17:14:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 17:14:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,573 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 10 states. [2018-12-09 17:14:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:28,603 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-12-09 17:14:28,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 17:14:28,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2018-12-09 17:14:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:28,604 INFO L225 Difference]: With dead ends: 93 [2018-12-09 17:14:28,604 INFO L226 Difference]: Without dead ends: 93 [2018-12-09 17:14:28,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-09 17:14:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-09 17:14:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 17:14:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-12-09 17:14:28,605 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 79 [2018-12-09 17:14:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:28,606 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-12-09 17:14:28,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 17:14:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-12-09 17:14:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-09 17:14:28,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:28,606 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:28,606 INFO L423 AbstractCegarLoop]: === Iteration 20 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:28,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2025699807, now seen corresponding path program 10 times [2018-12-09 17:14:28,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:28,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:28,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,607 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,647 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:28,647 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:28,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:28,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,647 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:28,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:28,659 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:14:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:28,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2018-12-09 17:14:28,768 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:28,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 17:14:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 17:14:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,769 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 11 states. [2018-12-09 17:14:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:28,802 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2018-12-09 17:14:28,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 17:14:28,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2018-12-09 17:14:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:28,803 INFO L225 Difference]: With dead ends: 98 [2018-12-09 17:14:28,803 INFO L226 Difference]: Without dead ends: 98 [2018-12-09 17:14:28,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-09 17:14:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-12-09 17:14:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-09 17:14:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-12-09 17:14:28,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 84 [2018-12-09 17:14:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:28,805 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-12-09 17:14:28,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 17:14:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-12-09 17:14:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-09 17:14:28,806 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:28,806 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:28,806 INFO L423 AbstractCegarLoop]: === Iteration 21 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:28,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash -809435107, now seen corresponding path program 11 times [2018-12-09 17:14:28,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:14:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:28,807 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,856 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:28,856 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:28,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:28,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:28,856 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:28,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:14:28,864 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:14:28,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 17:14:28,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:28,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:28,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:29,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:29,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2018-12-09 17:14:29,048 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:29,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 17:14:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 17:14:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:29,049 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 12 states. [2018-12-09 17:14:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:29,078 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-12-09 17:14:29,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 17:14:29,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2018-12-09 17:14:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:29,079 INFO L225 Difference]: With dead ends: 103 [2018-12-09 17:14:29,079 INFO L226 Difference]: Without dead ends: 103 [2018-12-09 17:14:29,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-09 17:14:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-12-09 17:14:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-09 17:14:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-12-09 17:14:29,081 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2018-12-09 17:14:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:29,081 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-12-09 17:14:29,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 17:14:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-12-09 17:14:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-09 17:14:29,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:29,082 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:29,082 INFO L423 AbstractCegarLoop]: === Iteration 22 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:29,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2070731871, now seen corresponding path program 12 times [2018-12-09 17:14:29,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:29,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:29,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:29,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:29,083 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:14:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:29,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:29,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:14:29,148 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:14:29,148 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:14:29,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:14:29,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:14:29,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:14:29,157 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:14:29,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:14:29,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:14:29,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:14:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:29,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:14:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-09 17:14:29,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:14:29,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2018-12-09 17:14:29,373 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:14:29,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 17:14:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 17:14:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:29,373 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2018-12-09 17:14:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:14:29,404 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2018-12-09 17:14:29,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 17:14:29,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2018-12-09 17:14:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:14:29,405 INFO L225 Difference]: With dead ends: 104 [2018-12-09 17:14:29,405 INFO L226 Difference]: Without dead ends: 104 [2018-12-09 17:14:29,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 17:14:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-09 17:14:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-12-09 17:14:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-09 17:14:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-12-09 17:14:29,408 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 94 [2018-12-09 17:14:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:14:29,408 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-12-09 17:14:29,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 17:14:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-12-09 17:14:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-09 17:14:29,408 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:14:29,408 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:14:29,409 INFO L423 AbstractCegarLoop]: === Iteration 23 === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, getNumbersErr1REQUIRES_VIOLATION, getNumbersErr0REQUIRES_VIOLATION]=== [2018-12-09 17:14:29,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:14:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1646357859, now seen corresponding path program 13 times [2018-12-09 17:14:29,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:14:29,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:29,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:14:29,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:14:29,409 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:14:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 17:14:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 17:14:29,507 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 17:14:29,535 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 44 could not be translated for associated CType ARRAY#_10_~INT# [2018-12-09 17:14:29,535 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 45 could not be translated for associated CType ARRAY#_10_~INT# [2018-12-09 17:14:29,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:14:29 BoogieIcfgContainer [2018-12-09 17:14:29,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 17:14:29,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 17:14:29,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 17:14:29,553 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 17:14:29,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:14:22" (3/4) ... [2018-12-09 17:14:29,555 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 17:14:29,564 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 44 could not be translated for associated CType ARRAY#_10_~INT# [2018-12-09 17:14:29,564 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 45 could not be translated for associated CType ARRAY#_10_~INT# [2018-12-09 17:14:29,606 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d2d05138-6e7f-4d39-b8bf-e1587556fe72/bin-2019/utaipan/witness.graphml [2018-12-09 17:14:29,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 17:14:29,607 INFO L168 Benchmark]: Toolchain (without parser) took 7484.65 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 323.0 MB). Free memory was 952.4 MB in the beginning and 962.5 MB in the end (delta: -10.1 MB). Peak memory consumption was 312.9 MB. Max. memory is 11.5 GB. [2018-12-09 17:14:29,607 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:14:29,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.18 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 17:14:29,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.59 ms. Allocated memory is still 1.0 GB. Free memory is still 941.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:14:29,608 INFO L168 Benchmark]: Boogie Preprocessor took 45.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.7 MB in the beginning and 1.1 GB in the end (delta: -187.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-09 17:14:29,608 INFO L168 Benchmark]: RCFGBuilder took 163.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-12-09 17:14:29,608 INFO L168 Benchmark]: TraceAbstraction took 7078.65 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 186.1 MB). Free memory was 1.1 GB in the beginning and 962.5 MB in the end (delta: 148.2 MB). Peak memory consumption was 334.3 MB. Max. memory is 11.5 GB. [2018-12-09 17:14:29,608 INFO L168 Benchmark]: Witness Printer took 53.60 ms. Allocated memory is still 1.4 GB. Free memory is still 962.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:14:29,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.18 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.59 ms. Allocated memory is still 1.0 GB. Free memory is still 941.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.7 MB in the beginning and 1.1 GB in the end (delta: -187.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7078.65 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 186.1 MB). Free memory was 1.1 GB in the beginning and 962.5 MB in the end (delta: 148.2 MB). Peak memory consumption was 334.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.60 ms. Allocated memory is still 1.4 GB. Free memory is still 962.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 44 could not be translated for associated CType ARRAY#_10_~INT# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 45 could not be translated for associated CType ARRAY#_10_~INT# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 44 could not be translated for associated CType ARRAY#_10_~INT# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 45 could not be translated for associated CType ARRAY#_10_~INT# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [\old(array)=null, \old(array)=null, array={42:0}] [L25] CALL, EXPR getNumbers2() VAL [array={42:0}] [L13] CALL, EXPR getNumbers() VAL [array={42:0}] [L5] int i = 0; VAL [array={42:0}, i=0] [L5] COND TRUE i < 10 VAL [array={42:0}, i=0] [L6] array[i] = i VAL [array={42:0}, i=0] [L5] ++i VAL [array={42:0}, i=1] [L5] COND TRUE i < 10 VAL [array={42:0}, i=1] [L6] array[i] = i VAL [array={42:0}, i=1] [L5] ++i VAL [array={42:0}, i=2] [L5] COND TRUE i < 10 VAL [array={42:0}, i=2] [L6] array[i] = i VAL [array={42:0}, i=2] [L5] ++i VAL [array={42:0}, i=3] [L5] COND TRUE i < 10 VAL [array={42:0}, i=3] [L6] array[i] = i VAL [array={42:0}, i=3] [L5] ++i VAL [array={42:0}, i=4] [L5] COND TRUE i < 10 VAL [array={42:0}, i=4] [L6] array[i] = i VAL [array={42:0}, i=4] [L5] ++i VAL [array={42:0}, i=5] [L5] COND TRUE i < 10 VAL [array={42:0}, i=5] [L6] array[i] = i VAL [array={42:0}, i=5] [L5] ++i VAL [array={42:0}, i=6] [L5] COND TRUE i < 10 VAL [array={42:0}, i=6] [L6] array[i] = i VAL [array={42:0}, i=6] [L5] ++i VAL [array={42:0}, i=7] [L5] COND TRUE i < 10 VAL [array={42:0}, i=7] [L6] array[i] = i VAL [array={42:0}, i=7] [L5] ++i VAL [array={42:0}, i=8] [L5] COND TRUE i < 10 VAL [array={42:0}, i=8] [L6] array[i] = i VAL [array={42:0}, i=8] [L5] ++i VAL [array={42:0}, i=9] [L5] COND TRUE i < 10 VAL [array={42:0}, i=9] [L6] array[i] = i VAL [array={42:0}, i=9] [L5] ++i VAL [array={42:0}, i=10] [L5] COND FALSE !(i < 10) VAL [array={42:0}, i=10] [L9] return array; VAL [\result={42:0}, array={42:0}, i=10] [L13] RET, EXPR getNumbers() VAL [array={42:0}, getNumbers()={42:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={42:0}, i=0, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=0, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=0, numbers={42:0}, numbers2={46:0}, numbers[i]=0] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=0, numbers={42:0}, numbers2={46:0}, numbers[i]=0] [L17] ++i VAL [array={42:0}, i=1, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=1, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=1, numbers={42:0}, numbers2={46:0}, numbers[i]=1] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=1, numbers={42:0}, numbers2={46:0}, numbers[i]=1] [L17] ++i VAL [array={42:0}, i=2, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=2, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=2, numbers={42:0}, numbers2={46:0}, numbers[i]=2] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=2, numbers={42:0}, numbers2={46:0}, numbers[i]=2] [L17] ++i VAL [array={42:0}, i=3, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=3, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=3, numbers={42:0}, numbers2={46:0}, numbers[i]=3] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=3, numbers={42:0}, numbers2={46:0}, numbers[i]=3] [L17] ++i VAL [array={42:0}, i=4, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=4, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=4, numbers={42:0}, numbers2={46:0}, numbers[i]=4] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=4, numbers={42:0}, numbers2={46:0}, numbers[i]=4] [L17] ++i VAL [array={42:0}, i=5, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=5, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=5, numbers={42:0}, numbers2={46:0}, numbers[i]=5] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=5, numbers={42:0}, numbers2={46:0}, numbers[i]=5] [L17] ++i VAL [array={42:0}, i=6, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=6, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=6, numbers={42:0}, numbers2={46:0}, numbers[i]=6] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=6, numbers={42:0}, numbers2={46:0}, numbers[i]=6] [L17] ++i VAL [array={42:0}, i=7, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=7, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=7, numbers={42:0}, numbers2={46:0}, numbers[i]=7] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=7, numbers={42:0}, numbers2={46:0}, numbers[i]=7] [L17] ++i VAL [array={42:0}, i=8, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=8, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=8, numbers={42:0}, numbers2={46:0}, numbers[i]=8] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=8, numbers={42:0}, numbers2={46:0}, numbers[i]=8] [L17] ++i VAL [array={42:0}, i=9, numbers={42:0}, numbers2={46:0}] [L17] COND TRUE i < 10 VAL [array={42:0}, i=9, numbers={42:0}, numbers2={46:0}] [L18] EXPR numbers[i] VAL [array={42:0}, i=9, numbers={42:0}, numbers2={46:0}, numbers[i]=9] [L18] numbers2[i] = numbers[i] VAL [array={42:0}, i=9, numbers={42:0}, numbers2={46:0}, numbers[i]=9] [L17] ++i VAL [array={42:0}, i=10, numbers={42:0}, numbers2={46:0}] [L17] COND FALSE !(i < 10) VAL [array={42:0}, i=10, numbers={42:0}, numbers2={46:0}] [L21] return numbers2; [L21] return numbers2; VAL [\result={46:0}, array={42:0}, i=10, numbers={42:0}] [L25] RET, EXPR getNumbers2() VAL [array={42:0}, getNumbers2()={46:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 9 error locations. UNSAFE Result, 7.0s OverallTime, 23 OverallIterations, 10 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 594 SDtfs, 465 SDslu, 2421 SDs, 0 SdLazy, 856 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2150 GetRequests, 1870 SyntacticMatches, 60 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 46 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 2138 NumberOfCodeBlocks, 2028 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2973 ConstructedInterpolants, 20 QuantifiedInterpolants, 401974 SizeOfPredicates, 33 NumberOfNonLiveVariables, 3579 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 60 InterpolantComputations, 9 PerfectInterpolantSequences, 3918/7022 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...