./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3_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_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/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 6b14dd63832ca953bb678ff696ab3d8598ab5b62 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:22:31,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 01:22:31,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 01:22:31,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 01:22:31,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 01:22:31,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 01:22:31,542 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 01:22:31,542 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 01:22:31,543 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 01:22:31,544 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 01:22:31,544 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 01:22:31,544 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 01:22:31,545 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 01:22:31,545 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 01:22:31,545 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 01:22:31,546 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 01:22:31,546 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 01:22:31,547 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 01:22:31,548 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 01:22:31,549 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 01:22:31,549 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 01:22:31,550 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 01:22:31,551 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 01:22:31,551 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 01:22:31,551 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 01:22:31,551 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 01:22:31,552 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 01:22:31,552 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 01:22:31,552 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 01:22:31,553 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 01:22:31,553 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 01:22:31,553 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 01:22:31,553 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 01:22:31,554 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 01:22:31,554 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 01:22:31,554 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 01:22:31,554 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 01:22:31,562 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 01:22:31,562 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 01:22:31,562 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 01:22:31,562 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 01:22:31,562 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 01:22:31,562 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 01:22:31,563 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 01:22:31,563 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 01:22:31,564 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 01:22:31,564 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 01:22:31,565 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 01:22:31,565 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 01:22:31,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 01:22:31,566 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_6a06a605-d6fd-4d23-9651-b200ecc40bec/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 -> 6b14dd63832ca953bb678ff696ab3d8598ab5b62 [2018-12-09 01:22:31,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 01:22:31,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 01:22:31,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 01:22:31,597 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 01:22:31,597 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 01:22:31,598 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3_true-valid-memsafety_true-termination.c [2018-12-09 01:22:31,645 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/data/b6d5560a4/f4b57d65a37b4feea4c0ab9d92370f0d/FLAGaab4998b3 [2018-12-09 01:22:32,030 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 01:22:32,030 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/sv-benchmarks/c/ldv-memsafety/memsetNonZero3_true-valid-memsafety_true-termination.c [2018-12-09 01:22:32,035 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/data/b6d5560a4/f4b57d65a37b4feea4c0ab9d92370f0d/FLAGaab4998b3 [2018-12-09 01:22:32,046 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/data/b6d5560a4/f4b57d65a37b4feea4c0ab9d92370f0d [2018-12-09 01:22:32,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 01:22:32,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 01:22:32,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 01:22:32,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 01:22:32,054 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 01:22:32,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e1e261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32, skipping insertion in model container [2018-12-09 01:22:32,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 01:22:32,069 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 01:22:32,151 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:22:32,156 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 01:22:32,166 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:22:32,175 INFO L195 MainTranslator]: Completed translation [2018-12-09 01:22:32,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32 WrapperNode [2018-12-09 01:22:32,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 01:22:32,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 01:22:32,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 01:22:32,176 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 01:22:32,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 01:22:32,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 01:22:32,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 01:22:32,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 01:22:32,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... [2018-12-09 01:22:32,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 01:22:32,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 01:22:32,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 01:22:32,233 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 01:22:32,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/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 01:22:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 01:22:32,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 01:22:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-12-09 01:22:32,264 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-12-09 01:22:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 01:22:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 01:22:32,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 01:22:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 01:22:32,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 01:22:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 01:22:32,319 WARN L615 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-12-09 01:22:32,348 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 01:22:32,348 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 01:22:32,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:22:32 BoogieIcfgContainer [2018-12-09 01:22:32,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 01:22:32,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 01:22:32,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 01:22:32,351 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 01:22:32,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:22:32" (1/3) ... [2018-12-09 01:22:32,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e7fdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:22:32, skipping insertion in model container [2018-12-09 01:22:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:22:32" (2/3) ... [2018-12-09 01:22:32,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e7fdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:22:32, skipping insertion in model container [2018-12-09 01:22:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:22:32" (3/3) ... [2018-12-09 01:22:32,353 INFO L112 eAbstractionObserver]: Analyzing ICFG memsetNonZero3_true-valid-memsafety_true-termination.c [2018-12-09 01:22:32,358 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 01:22:32,362 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-09 01:22:32,371 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-09 01:22:32,385 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 01:22:32,385 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 01:22:32,385 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 01:22:32,385 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 01:22:32,386 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 01:22:32,386 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 01:22:32,386 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 01:22:32,386 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 01:22:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 01:22:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-09 01:22:32,398 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:22:32,399 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:22:32,400 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 01:22:32,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2018-12-09 01:22:32,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:22:32,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:22:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,483 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 01:22:32,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:22:32,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 01:22:32,485 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:22:32,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 01:22:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 01:22:32,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 01:22:32,497 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-12-09 01:22:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:22:32,516 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-09 01:22:32,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 01:22:32,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-09 01:22:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:22:32,522 INFO L225 Difference]: With dead ends: 19 [2018-12-09 01:22:32,522 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 01:22:32,524 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 01:22:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 01:22:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 01:22:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 01:22:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-09 01:22:32,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2018-12-09 01:22:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:22:32,547 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-09 01:22:32,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 01:22:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-09 01:22:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-09 01:22:32,548 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:22:32,548 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:22:32,548 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 01:22:32,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2018-12-09 01:22:32,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:22:32,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:22:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,581 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 01:22:32,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:22:32,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 01:22:32,581 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:22:32,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 01:22:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 01:22:32,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 01:22:32,582 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-12-09 01:22:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:22:32,586 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-09 01:22:32,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 01:22:32,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-09 01:22:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:22:32,587 INFO L225 Difference]: With dead ends: 15 [2018-12-09 01:22:32,587 INFO L226 Difference]: Without dead ends: 15 [2018-12-09 01:22:32,588 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 01:22:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-09 01:22:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-09 01:22:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 01:22:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-09 01:22:32,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2018-12-09 01:22:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:22:32,590 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-09 01:22:32,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 01:22:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-09 01:22:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 01:22:32,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:22:32,590 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:22:32,590 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 01:22:32,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2018-12-09 01:22:32,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:22:32,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,591 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:22:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,625 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 01:22:32,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:22:32,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 01:22:32,626 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:22:32,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 01:22:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 01:22:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 01:22:32,626 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-12-09 01:22:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:22:32,650 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-09 01:22:32,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 01:22:32,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 01:22:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:22:32,651 INFO L225 Difference]: With dead ends: 18 [2018-12-09 01:22:32,651 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 01:22:32,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:22:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 01:22:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 01:22:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 01:22:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-09 01:22:32,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-12-09 01:22:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:22:32,654 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-09 01:22:32,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 01:22:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-09 01:22:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 01:22:32,654 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:22:32,654 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:22:32,654 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 01:22:32,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2018-12-09 01:22:32,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:22:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,656 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:22:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:22:32,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:22:32,692 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:22:32,692 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-12-09 01:22:32,694 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [9], [10], [14], [18], [20], [21], [22], [23], [25], [26] [2018-12-09 01:22:32,715 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 01:22:32,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 01:22:32,809 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 01:22:32,810 INFO L272 AbstractInterpreter]: Visited 15 different actions 23 times. Merged at 3 different actions 5 times. Never widened. Performed 116 root evaluator evaluations with a maximum evaluation depth of 4. Performed 116 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 15 variables. [2018-12-09 01:22:32,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,815 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 01:22:32,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:22:32,815 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/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 01:22:32,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,821 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 01:22:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:22:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:22:32,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:22:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:22:32,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 01:22:32,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-12-09 01:22:32,919 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 01:22:32,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 01:22:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 01:22:32,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-09 01:22:32,920 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2018-12-09 01:22:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:22:32,946 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-09 01:22:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:22:32,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-12-09 01:22:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:22:32,947 INFO L225 Difference]: With dead ends: 19 [2018-12-09 01:22:32,947 INFO L226 Difference]: Without dead ends: 17 [2018-12-09 01:22:32,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-09 01:22:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-09 01:22:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-09 01:22:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-09 01:22:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-09 01:22:32,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-12-09 01:22:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:22:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-09 01:22:32,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 01:22:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-09 01:22:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 01:22:32,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:22:32,951 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:22:32,951 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 01:22:32,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:22:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2018-12-09 01:22:32,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:22:32,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:22:32,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:22:32,953 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:22:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:22:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 01:22:32,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:22:32,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:22:32,990 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 01:22:32,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 01:22:32,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:22:32,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/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 01:22:32,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 01:22:32,997 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 01:22:33,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 01:22:33,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 01:22:33,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:22:33,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 01:22:33,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-12-09 01:22:33,039 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 01:22:33,041 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 01:22:33,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-12-09 01:22:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 01:22:33,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:22:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 01:22:33,377 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 01:22:33,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-12-09 01:22:33,377 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:22:33,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 01:22:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 01:22:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2018-12-09 01:22:33,378 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-12-09 01:22:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:22:33,415 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-09 01:22:33,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 01:22:33,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-12-09 01:22:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:22:33,416 INFO L225 Difference]: With dead ends: 16 [2018-12-09 01:22:33,416 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 01:22:33,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=118, Unknown=1, NotChecked=0, Total=156 [2018-12-09 01:22:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 01:22:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 01:22:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 01:22:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 01:22:33,416 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-12-09 01:22:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:22:33,417 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 01:22:33,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 01:22:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 01:22:33,417 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 01:22:33,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:22:33 BoogieIcfgContainer [2018-12-09 01:22:33,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 01:22:33,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 01:22:33,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 01:22:33,420 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 01:22:33,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:22:32" (3/4) ... [2018-12-09 01:22:33,424 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 01:22:33,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 01:22:33,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2018-12-09 01:22:33,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 01:22:33,431 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-12-09 01:22:33,432 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-09 01:22:33,432 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 01:22:33,432 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 01:22:33,455 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6a06a605-d6fd-4d23-9651-b200ecc40bec/bin-2019/utaipan/witness.graphml [2018-12-09 01:22:33,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 01:22:33,456 INFO L168 Benchmark]: Toolchain (without parser) took 1406.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 949.7 MB in the beginning and 1.0 GB in the end (delta: -53.5 MB). Peak memory consumption was 94.9 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,457 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:22:33,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.48 ms. Allocated memory is still 1.0 GB. Free memory is still 938.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:22:33,458 INFO L168 Benchmark]: Boogie Preprocessor took 43.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -204.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,458 INFO L168 Benchmark]: RCFGBuilder took 115.24 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: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,458 INFO L168 Benchmark]: TraceAbstraction took 1070.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.1 MB). Peak memory consumption was 122.1 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,459 INFO L168 Benchmark]: Witness Printer took 35.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-12-09 01:22:33,460 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.48 ms. Allocated memory is still 1.0 GB. Free memory is still 938.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -204.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 115.24 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: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1070.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.1 MB). Peak memory consumption was 122.1 MB. Max. memory is 11.5 GB. * Witness Printer took 35.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. SAFE Result, 1.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 13 SDslu, 83 SDs, 0 SdLazy, 58 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 90 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 112 ConstructedInterpolants, 9 QuantifiedInterpolants, 4169 SizeOfPredicates, 1 NumberOfNonLiveVariables, 133 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...