./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 16:44:30,018 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 16:44:30,019 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 16:44:30,025 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 16:44:30,025 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 16:44:30,026 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 16:44:30,027 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 16:44:30,027 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 16:44:30,028 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 16:44:30,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 16:44:30,029 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 16:44:30,029 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 16:44:30,030 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 16:44:30,030 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 16:44:30,031 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 16:44:30,031 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 16:44:30,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 16:44:30,032 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 16:44:30,033 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 16:44:30,034 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 16:44:30,035 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 16:44:30,035 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 16:44:30,036 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 16:44:30,037 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 16:44:30,037 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 16:44:30,037 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 16:44:30,038 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 16:44:30,038 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 16:44:30,038 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 16:44:30,039 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 16:44:30,039 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 16:44:30,039 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 16:44:30,040 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 16:44:30,040 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 16:44:30,040 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 16:44:30,041 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 16:44:30,041 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 16:44:30,048 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 16:44:30,048 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 16:44:30,049 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 16:44:30,049 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 16:44:30,049 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 16:44:30,050 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 16:44:30,050 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 16:44:30,050 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 16:44:30,051 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 16:44:30,051 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 16:44:30,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 16:44:30,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 16:44:30,052 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 16:44:30,052 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 16:44:30,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 16:44:30,052 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_5e3ac232-bf0a-43ad-8671-57dde921e94b/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 -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2018-12-09 16:44:30,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 16:44:30,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 16:44:30,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 16:44:30,078 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 16:44:30,078 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 16:44:30,079 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-09 16:44:30,113 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/data/7d4fa0009/21ed574e48b74b258640ac0ff14ba8d7/FLAG320916588 [2018-12-09 16:44:30,555 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 16:44:30,555 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-09 16:44:30,559 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/data/7d4fa0009/21ed574e48b74b258640ac0ff14ba8d7/FLAG320916588 [2018-12-09 16:44:30,567 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/data/7d4fa0009/21ed574e48b74b258640ac0ff14ba8d7 [2018-12-09 16:44:30,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 16:44:30,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 16:44:30,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 16:44:30,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 16:44:30,572 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 16:44:30,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ddcec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30, skipping insertion in model container [2018-12-09 16:44:30,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 16:44:30,587 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 16:44:30,669 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 16:44:30,674 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 16:44:30,684 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 16:44:30,692 INFO L195 MainTranslator]: Completed translation [2018-12-09 16:44:30,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30 WrapperNode [2018-12-09 16:44:30,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 16:44:30,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 16:44:30,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 16:44:30,693 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 16:44:30,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 16:44:30,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 16:44:30,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 16:44:30,707 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 16:44:30,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... [2018-12-09 16:44:30,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 16:44:30,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 16:44:30,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 16:44:30,753 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 16:44:30,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 16:44:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 16:44:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 16:44:30,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 16:44:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 16:44:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-12-09 16:44:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-12-09 16:44:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 16:44:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 16:44:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 16:44:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 16:44:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 16:44:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 16:44:30,930 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 16:44:30,930 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 16:44:30,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:30 BoogieIcfgContainer [2018-12-09 16:44:30,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 16:44:30,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 16:44:30,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 16:44:30,935 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 16:44:30,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:44:30" (1/3) ... [2018-12-09 16:44:30,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602fd028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:44:30, skipping insertion in model container [2018-12-09 16:44:30,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:30" (2/3) ... [2018-12-09 16:44:30,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602fd028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:44:30, skipping insertion in model container [2018-12-09 16:44:30,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:30" (3/3) ... [2018-12-09 16:44:30,937 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-09 16:44:30,946 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 16:44:30,952 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-09 16:44:30,965 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-09 16:44:30,985 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 16:44:30,985 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 16:44:30,985 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 16:44:30,986 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 16:44:30,986 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 16:44:30,986 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 16:44:30,986 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 16:44:30,986 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 16:44:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-12-09 16:44:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 16:44:31,001 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,003 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2018-12-09 16:44:31,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,035 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:44:31,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 16:44:31,092 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:31,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 16:44:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 16:44:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 16:44:31,105 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2018-12-09 16:44:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,143 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-12-09 16:44:31,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 16:44:31,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 16:44:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,149 INFO L225 Difference]: With dead ends: 58 [2018-12-09 16:44:31,149 INFO L226 Difference]: Without dead ends: 54 [2018-12-09 16:44:31,150 INFO L631 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 [2018-12-09 16:44:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-09 16:44:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2018-12-09 16:44:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 16:44:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-12-09 16:44:31,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2018-12-09 16:44:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,173 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-12-09 16:44:31,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 16:44:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-12-09 16:44:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 16:44:31,173 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,173 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,174 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2018-12-09 16:44:31,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,175 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:44:31,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 16:44:31,197 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:31,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 16:44:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 16:44:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 16:44:31,198 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 3 states. [2018-12-09 16:44:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,216 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-12-09 16:44:31,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 16:44:31,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-12-09 16:44:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,218 INFO L225 Difference]: With dead ends: 49 [2018-12-09 16:44:31,218 INFO L226 Difference]: Without dead ends: 49 [2018-12-09 16:44:31,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 16:44:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-09 16:44:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2018-12-09 16:44:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 16:44:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-12-09 16:44:31,221 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2018-12-09 16:44:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,221 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-12-09 16:44:31,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 16:44:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-12-09 16:44:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 16:44:31,222 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,222 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,222 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,222 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2018-12-09 16:44:31,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,223 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:44:31,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 16:44:31,254 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 16:44:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 16:44:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 16:44:31,255 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2018-12-09 16:44:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,290 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-09 16:44:31,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 16:44:31,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-09 16:44:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,291 INFO L225 Difference]: With dead ends: 40 [2018-12-09 16:44:31,291 INFO L226 Difference]: Without dead ends: 40 [2018-12-09 16:44:31,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 16:44:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-09 16:44:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-09 16:44:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 16:44:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-12-09 16:44:31,294 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2018-12-09 16:44:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,294 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-12-09 16:44:31,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 16:44:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-12-09 16:44:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 16:44:31,294 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,294 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,295 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2018-12-09 16:44:31,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,296 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:44:31,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 16:44:31,350 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:31,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 16:44:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 16:44:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 16:44:31,351 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2018-12-09 16:44:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,402 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-09 16:44:31,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 16:44:31,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-09 16:44:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,403 INFO L225 Difference]: With dead ends: 42 [2018-12-09 16:44:31,403 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 16:44:31,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-09 16:44:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 16:44:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-12-09 16:44:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 16:44:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-12-09 16:44:31,406 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 12 [2018-12-09 16:44:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,406 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-12-09 16:44:31,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 16:44:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-12-09 16:44:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 16:44:31,406 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,407 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,407 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,407 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2018-12-09 16:44:31,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,408 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:44:31,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 16:44:31,449 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:31,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 16:44:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 16:44:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 16:44:31,450 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2018-12-09 16:44:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,477 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-12-09 16:44:31,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 16:44:31,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-09 16:44:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,478 INFO L225 Difference]: With dead ends: 45 [2018-12-09 16:44:31,479 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 16:44:31,479 INFO L631 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 [2018-12-09 16:44:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 16:44:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-12-09 16:44:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 16:44:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-12-09 16:44:31,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 15 [2018-12-09 16:44:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,481 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-12-09 16:44:31,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 16:44:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-12-09 16:44:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 16:44:31,482 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,482 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,482 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2018-12-09 16:44:31,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,484 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:31,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:31,535 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-09 16:44:31,536 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [10], [11], [12], [13], [16], [18], [27], [35], [73], [74], [75], [77] [2018-12-09 16:44:31,556 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 16:44:31,556 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 16:44:31,666 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 16:44:31,667 INFO L272 AbstractInterpreter]: Visited 15 different actions 33 times. Merged at 6 different actions 16 times. Never widened. Performed 194 root evaluator evaluations with a maximum evaluation depth of 3. Performed 194 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-12-09 16:44:31,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 16:44:31,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:31,673 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:31,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,679 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:44:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:44:31,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2018-12-09 16:44:31,752 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:44:31,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 16:44:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 16:44:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-09 16:44:31,752 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2018-12-09 16:44:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:31,819 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-12-09 16:44:31,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 16:44:31,820 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-12-09 16:44:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:31,820 INFO L225 Difference]: With dead ends: 47 [2018-12-09 16:44:31,821 INFO L226 Difference]: Without dead ends: 47 [2018-12-09 16:44:31,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-12-09 16:44:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-09 16:44:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-09 16:44:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-09 16:44:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-12-09 16:44:31,824 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 16 [2018-12-09 16:44:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-12-09 16:44:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 16:44:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-12-09 16:44:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-09 16:44:31,825 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:31,825 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:31,825 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:31,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -661735507, now seen corresponding path program 1 times [2018-12-09 16:44:31,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:31,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:31,826 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:31,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:31,930 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:31,930 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-12-09 16:44:31,930 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [35], [37], [39], [73], [74], [75], [77], [78] [2018-12-09 16:44:31,931 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 16:44:31,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 16:44:31,961 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 16:44:31,961 INFO L272 AbstractInterpreter]: Visited 20 different actions 32 times. Merged at 5 different actions 10 times. Never widened. Performed 160 root evaluator evaluations with a maximum evaluation depth of 3. Performed 160 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-12-09 16:44:31,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:31,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 16:44:31,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:31,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:31,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:31,969 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:44:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:31,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:44:32,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2018-12-09 16:44:32,126 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:44:32,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 16:44:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 16:44:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-12-09 16:44:32,127 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 12 states. [2018-12-09 16:44:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:32,254 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2018-12-09 16:44:32,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 16:44:32,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2018-12-09 16:44:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:32,255 INFO L225 Difference]: With dead ends: 59 [2018-12-09 16:44:32,255 INFO L226 Difference]: Without dead ends: 56 [2018-12-09 16:44:32,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2018-12-09 16:44:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-09 16:44:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-12-09 16:44:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-09 16:44:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2018-12-09 16:44:32,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 30 [2018-12-09 16:44:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:32,259 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2018-12-09 16:44:32,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 16:44:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2018-12-09 16:44:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 16:44:32,260 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:32,260 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:32,260 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:32,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723374, now seen corresponding path program 2 times [2018-12-09 16:44:32,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:32,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:32,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:32,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:32,261 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:32,391 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:32,391 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:44:32,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:44:32,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:32,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:32,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:44:32,397 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:44:32,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 16:44:32,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:44:32,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:32,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 16:44:32,429 INFO L478 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 [2018-12-09 16:44:32,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-09 16:44:32,432 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 16:44:32,435 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 16:44:32,440 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. [2018-12-09 16:44:32,441 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2018-12-09 16:44:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 16:44:32,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 16:44:32,547 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 16:44:32,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [8] total 11 [2018-12-09 16:44:32,547 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:32,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 16:44:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 16:44:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-09 16:44:32,547 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2018-12-09 16:44:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:32,571 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-12-09 16:44:32,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 16:44:32,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-12-09 16:44:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:32,572 INFO L225 Difference]: With dead ends: 50 [2018-12-09 16:44:32,572 INFO L226 Difference]: Without dead ends: 50 [2018-12-09 16:44:32,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-09 16:44:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-09 16:44:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-09 16:44:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 16:44:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-12-09 16:44:32,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2018-12-09 16:44:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:32,575 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2018-12-09 16:44:32,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 16:44:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2018-12-09 16:44:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 16:44:32,576 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:32,576 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:32,576 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:32,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723375, now seen corresponding path program 1 times [2018-12-09 16:44:32,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:32,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:32,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:44:32,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:32,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:32,665 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:32,665 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-12-09 16:44:32,665 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [35], [37], [40], [73], [74], [75], [77], [78] [2018-12-09 16:44:32,666 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 16:44:32,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 16:44:32,699 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 16:44:32,699 INFO L272 AbstractInterpreter]: Visited 20 different actions 43 times. Merged at 11 different actions 21 times. Never widened. Performed 219 root evaluator evaluations with a maximum evaluation depth of 4. Performed 219 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-12-09 16:44:32,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:32,700 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 16:44:32,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:32,701 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:32,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:32,707 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:44:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:32,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:32,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:44:32,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2018-12-09 16:44:32,873 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:44:32,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 16:44:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 16:44:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2018-12-09 16:44:32,874 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 14 states. [2018-12-09 16:44:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:33,017 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2018-12-09 16:44:33,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 16:44:33,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2018-12-09 16:44:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:33,018 INFO L225 Difference]: With dead ends: 62 [2018-12-09 16:44:33,018 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 16:44:33,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2018-12-09 16:44:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 16:44:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-12-09 16:44:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 16:44:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-12-09 16:44:33,020 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 35 [2018-12-09 16:44:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:33,020 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-12-09 16:44:33,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 16:44:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-12-09 16:44:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 16:44:33,021 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:33,021 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:33,021 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:33,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1819430834, now seen corresponding path program 2 times [2018-12-09 16:44:33,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,022 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:33,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:33,159 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:44:33,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:44:33,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,160 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:33,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:44:33,166 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:44:33,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 16:44:33,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:44:33,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:33,190 INFO L478 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 [2018-12-09 16:44:33,190 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,196 INFO L478 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 [2018-12-09 16:44:33,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 16:44:33,199 INFO L478 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 [2018-12-09 16:44:33,199 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,203 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,210 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. [2018-12-09 16:44:33,210 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-12-09 16:44:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-09 16:44:33,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-09 16:44:33,336 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 16:44:33,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [9] total 14 [2018-12-09 16:44:33,337 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:33,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 16:44:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 16:44:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-12-09 16:44:33,338 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 5 states. [2018-12-09 16:44:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:33,362 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2018-12-09 16:44:33,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 16:44:33,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2018-12-09 16:44:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:33,363 INFO L225 Difference]: With dead ends: 53 [2018-12-09 16:44:33,363 INFO L226 Difference]: Without dead ends: 53 [2018-12-09 16:44:33,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-12-09 16:44:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-09 16:44:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-09 16:44:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-09 16:44:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-12-09 16:44:33,365 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 40 [2018-12-09 16:44:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:33,365 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-12-09 16:44:33,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 16:44:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-12-09 16:44:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 16:44:33,366 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:33,366 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:33,366 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:33,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1970343113, now seen corresponding path program 1 times [2018-12-09 16:44:33,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:33,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:44:33,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,367 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-09 16:44:33,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:33,392 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2018-12-09 16:44:33,392 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [33], [35], [37], [38], [41], [43], [47], [55], [56], [61], [63], [72], [73], [74], [75], [77], [78] [2018-12-09 16:44:33,394 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 16:44:33,394 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 16:44:33,510 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 16:44:33,510 INFO L272 AbstractInterpreter]: Visited 29 different actions 194 times. Merged at 15 different actions 117 times. Widened at 1 different actions 3 times. Performed 984 root evaluator evaluations with a maximum evaluation depth of 4. Performed 984 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 13 fixpoints after 4 different actions. Largest state had 21 variables. [2018-12-09 16:44:33,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:33,511 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 16:44:33,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,511 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:33,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:33,517 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:44:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:33,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:33,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:44:33,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:44:33,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 18 [2018-12-09 16:44:33,710 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:44:33,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 16:44:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 16:44:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2018-12-09 16:44:33,711 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 11 states. [2018-12-09 16:44:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:33,791 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-12-09 16:44:33,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 16:44:33,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-09 16:44:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:33,792 INFO L225 Difference]: With dead ends: 89 [2018-12-09 16:44:33,792 INFO L226 Difference]: Without dead ends: 86 [2018-12-09 16:44:33,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2018-12-09 16:44:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-09 16:44:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2018-12-09 16:44:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 16:44:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-12-09 16:44:33,797 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 49 [2018-12-09 16:44:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:33,797 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-12-09 16:44:33,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 16:44:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-12-09 16:44:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-09 16:44:33,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:44:33,800 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:44:33,800 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 16:44:33,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:44:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 86332454, now seen corresponding path program 2 times [2018-12-09 16:44:33,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:44:33,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:44:33,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:44:33,801 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:44:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:44:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2018-12-09 16:44:33,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:44:33,854 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:44:33,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:44:33,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:44:33,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:44:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:44:33,861 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:44:33,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 16:44:33,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:44:33,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:44:33,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 16:44:33,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-12-09 16:44:33,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-09 16:44:33,896 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,901 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,905 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. [2018-12-09 16:44:33,905 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 16:44:33,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 16:44:33,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-12-09 16:44:33,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-09 16:44:33,947 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,951 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 16:44:33,957 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. [2018-12-09 16:44:33,957 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 16:44:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-12-09 16:44:34,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:44:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-12-09 16:44:34,651 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 16:44:34,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5] total 11 [2018-12-09 16:44:34,651 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:44:34,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 16:44:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 16:44:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2018-12-09 16:44:34,652 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 6 states. [2018-12-09 16:44:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:44:34,698 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2018-12-09 16:44:34,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 16:44:34,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2018-12-09 16:44:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:44:34,699 INFO L225 Difference]: With dead ends: 67 [2018-12-09 16:44:34,699 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 16:44:34,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2018-12-09 16:44:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 16:44:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 16:44:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 16:44:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 16:44:34,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2018-12-09 16:44:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:44:34,699 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 16:44:34,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 16:44:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 16:44:34,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 16:44:34,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:44:34 BoogieIcfgContainer [2018-12-09 16:44:34,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 16:44:34,703 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 16:44:34,703 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 16:44:34,703 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 16:44:34,703 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:30" (3/4) ... [2018-12-09 16:44:34,705 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 16:44:34,708 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 16:44:34,708 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-12-09 16:44:34,708 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 16:44:34,712 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2018-12-09 16:44:34,712 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-09 16:44:34,712 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 16:44:34,712 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 16:44:34,745 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5e3ac232-bf0a-43ad-8671-57dde921e94b/bin-2019/utaipan/witness.graphml [2018-12-09 16:44:34,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 16:44:34,746 INFO L168 Benchmark]: Toolchain (without parser) took 4177.06 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 323.0 MB). Free memory was 956.1 MB in the beginning and 1.3 GB in the end (delta: -316.6 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,747 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:44:34,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 122.69 ms. Allocated memory is still 1.0 GB. Free memory was 956.1 MB in the beginning and 944.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.46 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:44:34,748 INFO L168 Benchmark]: Boogie Preprocessor took 45.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -190.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,748 INFO L168 Benchmark]: RCFGBuilder took 178.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,748 INFO L168 Benchmark]: TraceAbstraction took 3770.79 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -158.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,749 INFO L168 Benchmark]: Witness Printer took 42.70 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2018-12-09 16:44:34,750 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 122.69 ms. Allocated memory is still 1.0 GB. Free memory was 956.1 MB in the beginning and 944.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.46 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -190.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3770.79 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -158.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * Witness Printer took 42.70 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 26]: 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: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: 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, 40 locations, 8 error locations. SAFE Result, 3.7s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 331 SDtfs, 366 SDslu, 1102 SDs, 0 SdLazy, 597 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 680 GetRequests, 551 SyntacticMatches, 8 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 55 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 660 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 934 ConstructedInterpolants, 135 QuantifiedInterpolants, 321905 SizeOfPredicates, 11 NumberOfNonLiveVariables, 629 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 26 InterpolantComputations, 11 PerfectInterpolantSequences, 1329/1698 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...