./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 07b05923cf5c1b39a35ab81b524575a0a488c268 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:44:07,726 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:44:07,727 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:44:07,735 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:44:07,736 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:44:07,736 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:44:07,737 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:44:07,738 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:44:07,739 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:44:07,740 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:44:07,741 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:44:07,741 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:44:07,741 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:44:07,742 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:44:07,743 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:44:07,743 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:44:07,744 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:44:07,746 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:44:07,747 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:44:07,748 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:44:07,749 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:44:07,749 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:44:07,751 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:44:07,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:44:07,751 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:44:07,752 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:44:07,752 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:44:07,753 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:44:07,754 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:44:07,755 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:44:07,755 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:44:07,755 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:44:07,755 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:44:07,755 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:44:07,756 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:44:07,757 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:44:07,757 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-18 15:44:07,767 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:44:07,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:44:07,768 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:44:07,768 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:44:07,768 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:44:07,768 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:44:07,768 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:44:07,769 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:44:07,769 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:44:07,769 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:44:07,770 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:44:07,770 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:44:07,770 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:44:07,770 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:44:07,771 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:44:07,771 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:44:07,772 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:44:07,772 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:44:07,773 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:44:07,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:44:07,774 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_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2018-11-18 15:44:07,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:44:07,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:44:07,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:44:07,812 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:44:07,812 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:44:07,813 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-11-18 15:44:07,856 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/data/bab9abcca/d2d7b55615bf448892e21547997f4ca4/FLAG706ee2ac0 [2018-11-18 15:44:08,254 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:44:08,254 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-11-18 15:44:08,258 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/data/bab9abcca/d2d7b55615bf448892e21547997f4ca4/FLAG706ee2ac0 [2018-11-18 15:44:08,267 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/data/bab9abcca/d2d7b55615bf448892e21547997f4ca4 [2018-11-18 15:44:08,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:44:08,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:44:08,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:44:08,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:44:08,274 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:44:08,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228ed96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08, skipping insertion in model container [2018-11-18 15:44:08,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:44:08,301 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:44:08,428 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:44:08,433 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:44:08,444 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:44:08,455 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:44:08,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08 WrapperNode [2018-11-18 15:44:08,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:44:08,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:44:08,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:44:08,457 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:44:08,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:44:08,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:44:08,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:44:08,475 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:44:08,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... [2018-11-18 15:44:08,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:44:08,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:44:08,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:44:08,496 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:44:08,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:44:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-11-18 15:44:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:44:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:44:08,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:44:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 15:44:08,744 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:44:08,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:44:08 BoogieIcfgContainer [2018-11-18 15:44:08,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:44:08,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:44:08,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:44:08,748 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:44:08,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:44:08" (1/3) ... [2018-11-18 15:44:08,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62034ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:44:08, skipping insertion in model container [2018-11-18 15:44:08,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:44:08" (2/3) ... [2018-11-18 15:44:08,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62034ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:44:08, skipping insertion in model container [2018-11-18 15:44:08,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:44:08" (3/3) ... [2018-11-18 15:44:08,751 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-11-18 15:44:08,759 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:44:08,764 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-18 15:44:08,774 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-18 15:44:08,792 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:44:08,793 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 15:44:08,793 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:44:08,793 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:44:08,793 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:44:08,793 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:44:08,793 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:44:08,793 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:44:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-11-18 15:44:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 15:44:08,811 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:08,811 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:08,813 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:08,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1597032710, now seen corresponding path program 1 times [2018-11-18 15:44:08,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:08,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:08,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:08,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:08,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:08,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:08,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:44:08,915 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:08,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 15:44:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 15:44:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:44:08,930 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-11-18 15:44:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:08,943 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-11-18 15:44:08,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 15:44:08,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-18 15:44:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:08,951 INFO L225 Difference]: With dead ends: 43 [2018-11-18 15:44:08,951 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 15:44:08,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:44:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 15:44:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-18 15:44:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 15:44:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-11-18 15:44:08,979 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 11 [2018-11-18 15:44:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:08,980 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-11-18 15:44:08,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 15:44:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-11-18 15:44:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 15:44:08,981 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:08,981 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:08,981 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:08,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1820883224, now seen corresponding path program 1 times [2018-11-18 15:44:08,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:08,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:08,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:08,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:08,983 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:09,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 15:44:09,035 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:09,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 15:44:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 15:44:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:44:09,038 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-11-18 15:44:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:09,083 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-11-18 15:44:09,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 15:44:09,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-18 15:44:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:09,085 INFO L225 Difference]: With dead ends: 59 [2018-11-18 15:44:09,085 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 15:44:09,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:44:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 15:44:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2018-11-18 15:44:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 15:44:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-11-18 15:44:09,094 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 12 [2018-11-18 15:44:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:09,095 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-11-18 15:44:09,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 15:44:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-11-18 15:44:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 15:44:09,095 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:09,095 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:09,095 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:09,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,096 INFO L82 PathProgramCache]: Analyzing trace with hash 697121729, now seen corresponding path program 1 times [2018-11-18 15:44:09,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:09,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,097 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,127 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:09,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:44:09,127 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:09,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 15:44:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 15:44:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:44:09,128 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 3 states. [2018-11-18 15:44:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:09,164 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-18 15:44:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 15:44:09,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-18 15:44:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:09,167 INFO L225 Difference]: With dead ends: 55 [2018-11-18 15:44:09,167 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 15:44:09,167 INFO L604 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 [2018-11-18 15:44:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 15:44:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-11-18 15:44:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-18 15:44:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-11-18 15:44:09,172 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 13 [2018-11-18 15:44:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:09,172 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-11-18 15:44:09,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 15:44:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-11-18 15:44:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 15:44:09,173 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:09,173 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:09,173 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:09,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash 135937166, now seen corresponding path program 1 times [2018-11-18 15:44:09,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,174 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:09,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 15:44:09,292 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:09,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:44:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:44:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-18 15:44:09,292 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2018-11-18 15:44:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:09,425 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-11-18 15:44:09,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 15:44:09,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-11-18 15:44:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:09,426 INFO L225 Difference]: With dead ends: 49 [2018-11-18 15:44:09,426 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 15:44:09,426 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:44:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 15:44:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2018-11-18 15:44:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 15:44:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-11-18 15:44:09,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 14 [2018-11-18 15:44:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:09,431 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-11-18 15:44:09,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:44:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-11-18 15:44:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 15:44:09,431 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:09,431 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:09,432 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:09,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,432 INFO L82 PathProgramCache]: Analyzing trace with hash 135937165, now seen corresponding path program 1 times [2018-11-18 15:44:09,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:09,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:09,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:44:09,470 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:09,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 15:44:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:44:09,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:44:09,471 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2018-11-18 15:44:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:09,539 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-11-18 15:44:09,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:44:09,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 15:44:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:09,540 INFO L225 Difference]: With dead ends: 45 [2018-11-18 15:44:09,540 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 15:44:09,541 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:44:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 15:44:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 15:44:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 15:44:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-11-18 15:44:09,545 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 14 [2018-11-18 15:44:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:09,546 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-11-18 15:44:09,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 15:44:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-11-18 15:44:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 15:44:09,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:09,546 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:09,547 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:09,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash -497753495, now seen corresponding path program 1 times [2018-11-18 15:44:09,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,548 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:44:09,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:44:09,606 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:09,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:44:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:44:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:44:09,607 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2018-11-18 15:44:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:09,669 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-11-18 15:44:09,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:44:09,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 15:44:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:09,670 INFO L225 Difference]: With dead ends: 51 [2018-11-18 15:44:09,671 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 15:44:09,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:44:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 15:44:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2018-11-18 15:44:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 15:44:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-11-18 15:44:09,674 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2018-11-18 15:44:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:09,675 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-11-18 15:44:09,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:44:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-11-18 15:44:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 15:44:09,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:09,675 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:09,676 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:09,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1254753657, now seen corresponding path program 1 times [2018-11-18 15:44:09,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:09,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:09,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:09,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:09,738 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 15:44:09,739 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [11], [12], [13], [14], [17], [19], [28], [32], [37], [76], [77], [78], [80] [2018-11-18 15:44:09,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:44:09,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:44:09,941 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:44:09,942 INFO L272 AbstractInterpreter]: Visited 17 different actions 38 times. Merged at 7 different actions 19 times. Never widened. Performed 198 root evaluator evaluations with a maximum evaluation depth of 3. Performed 198 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-11-18 15:44:09,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:09,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:44:09,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:09,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:09,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:09,971 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:44:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:09,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:44:10,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2018-11-18 15:44:10,056 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:44:10,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:44:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:44:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:44:10,057 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 9 states. [2018-11-18 15:44:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:10,131 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-11-18 15:44:10,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:44:10,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-11-18 15:44:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:10,134 INFO L225 Difference]: With dead ends: 55 [2018-11-18 15:44:10,134 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 15:44:10,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:44:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 15:44:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-18 15:44:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 15:44:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-11-18 15:44:10,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 19 [2018-11-18 15:44:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:10,138 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-11-18 15:44:10,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:44:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-11-18 15:44:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 15:44:10,139 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:10,139 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:10,140 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:10,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash -37851759, now seen corresponding path program 1 times [2018-11-18 15:44:10,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:10,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:10,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:10,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:10,141 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:10,264 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:10,265 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-11-18 15:44:10,265 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [41], [76], [77], [78], [80], [81] [2018-11-18 15:44:10,266 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:44:10,267 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:44:10,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:44:10,335 INFO L272 AbstractInterpreter]: Visited 22 different actions 60 times. Merged at 12 different actions 36 times. Never widened. Performed 270 root evaluator evaluations with a maximum evaluation depth of 3. Performed 270 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-11-18 15:44:10,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:10,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:44:10,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:10,342 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:10,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:10,351 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:44:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:10,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:44:10,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2018-11-18 15:44:10,548 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:44:10,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:44:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:44:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:44:10,549 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 12 states. [2018-11-18 15:44:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:10,694 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2018-11-18 15:44:10,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:44:10,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-11-18 15:44:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:10,695 INFO L225 Difference]: With dead ends: 68 [2018-11-18 15:44:10,695 INFO L226 Difference]: Without dead ends: 65 [2018-11-18 15:44:10,696 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2018-11-18 15:44:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-18 15:44:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2018-11-18 15:44:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 15:44:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2018-11-18 15:44:10,700 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 35 [2018-11-18 15:44:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:10,700 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2018-11-18 15:44:10,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:44:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2018-11-18 15:44:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 15:44:10,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:10,702 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:10,705 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:10,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1896571575, now seen corresponding path program 2 times [2018-11-18 15:44:10,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:10,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:10,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:10,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:10,707 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:10,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:10,846 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:10,846 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:44:10,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:44:10,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:10,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:10,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:44:10,866 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:44:10,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 15:44:10,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:44:10,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:10,899 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 15:44:10,902 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 27 [2018-11-18 15:44:10,904 INFO L477 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 23 treesize of output 15 [2018-11-18 15:44:10,905 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 15:44:10,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 15:44:10,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 15:44:10,912 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2018-11-18 15:44:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-11-18 15:44:10,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-11-18 15:44:11,053 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:44:11,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [8] total 11 [2018-11-18 15:44:11,054 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:11,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:44:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:44:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:44:11,054 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 4 states. [2018-11-18 15:44:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:11,074 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2018-11-18 15:44:11,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:44:11,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-18 15:44:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:11,075 INFO L225 Difference]: With dead ends: 59 [2018-11-18 15:44:11,075 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 15:44:11,075 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:44:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 15:44:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-18 15:44:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 15:44:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2018-11-18 15:44:11,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 41 [2018-11-18 15:44:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:11,078 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2018-11-18 15:44:11,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:44:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2018-11-18 15:44:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 15:44:11,078 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:11,078 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:11,079 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:11,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1896571574, now seen corresponding path program 1 times [2018-11-18 15:44:11,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:11,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:11,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:44:11,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:11,080 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:11,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:11,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:11,219 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-11-18 15:44:11,219 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [42], [76], [77], [78], [80], [81] [2018-11-18 15:44:11,220 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:44:11,220 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:44:11,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:44:11,266 INFO L272 AbstractInterpreter]: Visited 22 different actions 48 times. Merged at 12 different actions 24 times. Never widened. Performed 223 root evaluator evaluations with a maximum evaluation depth of 4. Performed 223 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-11-18 15:44:11,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:11,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:44:11,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:11,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:11,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:11,276 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:44:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:11,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:11,384 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:11,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:44:11,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2018-11-18 15:44:11,501 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:44:11,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:44:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:44:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:44:11,502 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 14 states. [2018-11-18 15:44:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:11,645 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2018-11-18 15:44:11,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 15:44:11,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2018-11-18 15:44:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:11,646 INFO L225 Difference]: With dead ends: 72 [2018-11-18 15:44:11,646 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 15:44:11,646 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2018-11-18 15:44:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 15:44:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-11-18 15:44:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-18 15:44:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-11-18 15:44:11,650 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 41 [2018-11-18 15:44:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:11,650 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-11-18 15:44:11,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:44:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-11-18 15:44:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-18 15:44:11,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:11,651 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:11,652 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:11,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 705045250, now seen corresponding path program 2 times [2018-11-18 15:44:11,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:11,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:11,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:11,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:11,653 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:11,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:11,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:11,810 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:44:11,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:44:11,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:11,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:11,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:44:11,818 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:44:11,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 15:44:11,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:44:11,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:11,843 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 1 [2018-11-18 15:44:11,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 15:44:11,854 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 15:44:11,856 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 15:44:11,857 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 15:44:11,857 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 15:44:11,861 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 15:44:11,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 15:44:11,865 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-11-18 15:44:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-18 15:44:11,952 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-18 15:44:12,005 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:44:12,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [9] total 14 [2018-11-18 15:44:12,005 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:12,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:44:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:44:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:44:12,006 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 5 states. [2018-11-18 15:44:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:12,048 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-11-18 15:44:12,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:44:12,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2018-11-18 15:44:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:12,049 INFO L225 Difference]: With dead ends: 63 [2018-11-18 15:44:12,049 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 15:44:12,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:44:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 15:44:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 15:44:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 15:44:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2018-11-18 15:44:12,052 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 47 [2018-11-18 15:44:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:12,052 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2018-11-18 15:44:12,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:44:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2018-11-18 15:44:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 15:44:12,054 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:12,055 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:12,055 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:12,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:12,055 INFO L82 PathProgramCache]: Analyzing trace with hash -313575809, now seen corresponding path program 1 times [2018-11-18 15:44:12,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:12,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:44:12,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:12,056 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-18 15:44:12,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:12,094 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:12,094 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 59 with the following transitions: [2018-11-18 15:44:12,095 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [59], [64], [66], [75], [76], [77], [78], [80], [81] [2018-11-18 15:44:12,096 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:44:12,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:44:12,226 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:44:12,226 INFO L272 AbstractInterpreter]: Visited 32 different actions 174 times. Merged at 16 different actions 95 times. Never widened. Performed 803 root evaluator evaluations with a maximum evaluation depth of 4. Performed 803 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 9 fixpoints after 4 different actions. Largest state had 22 variables. [2018-11-18 15:44:12,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:12,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:44:12,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:12,228 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:12,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:12,244 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:44:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:12,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:12,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:44:12,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:44:12,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 18 [2018-11-18 15:44:12,505 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:44:12,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 15:44:12,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 15:44:12,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:44:12,506 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 11 states. [2018-11-18 15:44:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:12,601 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2018-11-18 15:44:12,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:44:12,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2018-11-18 15:44:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:12,602 INFO L225 Difference]: With dead ends: 102 [2018-11-18 15:44:12,602 INFO L226 Difference]: Without dead ends: 99 [2018-11-18 15:44:12,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:44:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-18 15:44:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2018-11-18 15:44:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 15:44:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2018-11-18 15:44:12,605 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 58 [2018-11-18 15:44:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:12,606 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2018-11-18 15:44:12,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 15:44:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2018-11-18 15:44:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-18 15:44:12,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:44:12,608 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:44:12,609 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION]=== [2018-11-18 15:44:12,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:44:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash 607725746, now seen corresponding path program 2 times [2018-11-18 15:44:12,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:44:12,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:12,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:44:12,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:44:12,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:44:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:44:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-11-18 15:44:12,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:12,672 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:44:12,672 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:44:12,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:44:12,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:44:12,672 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/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 [2018-11-18 15:44:12,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:44:12,684 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:44:12,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 15:44:12,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:44:12,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:44:12,772 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 15:44:12,773 INFO L477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 15:44:12,777 INFO L477 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 23 treesize of output 15 [2018-11-18 15:44:12,777 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 15:44:12,784 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 15:44:12,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 15:44:12,789 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 15:44:12,845 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 15:44:12,846 INFO L477 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 15:44:12,848 INFO L477 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 23 treesize of output 15 [2018-11-18 15:44:12,848 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 15:44:12,855 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 15:44:12,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 15:44:12,859 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 15:44:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-11-18 15:44:13,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:44:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-11-18 15:44:13,608 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:44:13,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5] total 11 [2018-11-18 15:44:13,608 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:44:13,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 15:44:13,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:44:13,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2018-11-18 15:44:13,609 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 6 states. [2018-11-18 15:44:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:44:13,656 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2018-11-18 15:44:13,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:44:13,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-11-18 15:44:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:44:13,657 INFO L225 Difference]: With dead ends: 80 [2018-11-18 15:44:13,657 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:44:13,657 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2018-11-18 15:44:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:44:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:44:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:44:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:44:13,658 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 113 [2018-11-18 15:44:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:44:13,658 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:44:13,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 15:44:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:44:13,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:44:13,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:44:13 BoogieIcfgContainer [2018-11-18 15:44:13,662 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:44:13,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:44:13,662 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:44:13,662 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:44:13,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:44:08" (3/4) ... [2018-11-18 15:44:13,665 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:44:13,670 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:44:13,670 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-11-18 15:44:13,670 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:44:13,672 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2018-11-18 15:44:13,672 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 15:44:13,673 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 15:44:13,673 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:44:13,698 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3993fb4e-fc45-4407-8ec8-ac5558106e9b/bin-2019/utaipan/witness.graphml [2018-11-18 15:44:13,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:44:13,699 INFO L168 Benchmark]: Toolchain (without parser) took 5429.20 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.0 MB). Free memory was 958.1 MB in the beginning and 1.2 GB in the end (delta: -202.6 MB). Peak memory consumption was 111.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,700 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:44:13,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.19 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.08 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,701 INFO L168 Benchmark]: Boogie Preprocessor took 20.73 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:44:13,701 INFO L168 Benchmark]: RCFGBuilder took 249.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -192.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,702 INFO L168 Benchmark]: TraceAbstraction took 4916.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 153.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -30.5 MB). Peak memory consumption was 123.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,702 INFO L168 Benchmark]: Witness Printer took 36.50 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2018-11-18 15:44:13,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 185.19 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.4 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 18.08 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.73 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 249.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -192.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4916.31 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 153.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -30.5 MB). Peak memory consumption was 123.2 MB. Max. memory is 11.5 GB. * Witness Printer took 36.50 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 8 error locations. SAFE Result, 4.8s OverallTime, 13 OverallIterations, 14 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 410 SDtfs, 430 SDslu, 1196 SDs, 0 SdLazy, 616 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 794 GetRequests, 661 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 55 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 789 NumberOfCodeBlocks, 637 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1116 ConstructedInterpolants, 162 QuantifiedInterpolants, 461076 SizeOfPredicates, 11 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 27 InterpolantComputations, 12 PerfectInterpolantSequences, 1676/2154 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...