./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.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_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 2749915c63b6e758ac6033a38fbdad80769d2869 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 15:45:53,780 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:45:53,780 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:45:53,786 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:45:53,787 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:45:53,787 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:45:53,788 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:45:53,789 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:45:53,790 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:45:53,790 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:45:53,790 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:45:53,791 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:45:53,791 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:45:53,792 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:45:53,792 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:45:53,793 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:45:53,793 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:45:53,794 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:45:53,795 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:45:53,796 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:45:53,796 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:45:53,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:45:53,798 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:45:53,798 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:45:53,798 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:45:53,799 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:45:53,799 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:45:53,800 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:45:53,800 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:45:53,801 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:45:53,801 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:45:53,801 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:45:53,801 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:45:53,801 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:45:53,802 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:45:53,802 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:45:53,802 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-08 15:45:53,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:45:53,810 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:45:53,810 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 15:45:53,811 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 15:45:53,811 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 15:45:53,812 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 15:45:53,812 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 15:45:53,812 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 15:45:53,812 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 15:45:53,813 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:45:53,813 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:45:53,814 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 15:45:53,814 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 15:45:53,814 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 15:45:53,814 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:45:53,814 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:45:53,814 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:45:53,815 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:45:53,815 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 15:45:53,816 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:45:53,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 15:45:53,816 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_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 -> 2749915c63b6e758ac6033a38fbdad80769d2869 [2018-12-08 15:45:53,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:45:53,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:45:53,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:45:53,849 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:45:53,849 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:45:53,849 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-12-08 15:45:53,882 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/data/fa1fbff1f/56b578831a80470386654c0a5c7099c6/FLAG1582c6b26 [2018-12-08 15:45:54,257 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:45:54,257 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-12-08 15:45:54,261 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/data/fa1fbff1f/56b578831a80470386654c0a5c7099c6/FLAG1582c6b26 [2018-12-08 15:45:54,268 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/data/fa1fbff1f/56b578831a80470386654c0a5c7099c6 [2018-12-08 15:45:54,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:45:54,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 15:45:54,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:45:54,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:45:54,273 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:45:54,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2251f510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54, skipping insertion in model container [2018-12-08 15:45:54,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:45:54,287 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:45:54,370 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:45:54,376 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:45:54,384 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:45:54,392 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:45:54,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54 WrapperNode [2018-12-08 15:45:54,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:45:54,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 15:45:54,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 15:45:54,393 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 15:45:54,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 15:45:54,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:45:54,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:45:54,407 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:45:54,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... [2018-12-08 15:45:54,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:45:54,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:45:54,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:45:54,448 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:45:54,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 [2018-12-08 15:45:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 15:45:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:45:54,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:45:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 15:45:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:45:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:45:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 15:45:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:45:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:45:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 15:45:54,610 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:45:54,610 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 15:45:54,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:45:54 BoogieIcfgContainer [2018-12-08 15:45:54,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:45:54,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:45:54,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:45:54,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:45:54,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:45:54" (1/3) ... [2018-12-08 15:45:54,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423111ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:45:54, skipping insertion in model container [2018-12-08 15:45:54,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:45:54" (2/3) ... [2018-12-08 15:45:54,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423111ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:45:54, skipping insertion in model container [2018-12-08 15:45:54,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:45:54" (3/3) ... [2018-12-08 15:45:54,617 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca_false-valid-free.c [2018-12-08 15:45:54,626 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:45:54,632 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-08 15:45:54,646 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-08 15:45:54,669 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:45:54,669 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 15:45:54,669 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:45:54,669 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:45:54,669 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:45:54,669 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:45:54,669 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:45:54,669 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:45:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-12-08 15:45:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:45:54,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:54,686 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:54,687 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:54,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1804436064, now seen corresponding path program 1 times [2018-12-08 15:45:54,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:54,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:54,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,722 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:54,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:54,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:45:54,768 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:54,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 15:45:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 15:45:54,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:45:54,785 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2018-12-08 15:45:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:54,794 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-08 15:45:54,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 15:45:54,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-12-08 15:45:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:54,800 INFO L225 Difference]: With dead ends: 26 [2018-12-08 15:45:54,800 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 15:45:54,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:45:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 15:45:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-08 15:45:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 15:45:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-08 15:45:54,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 8 [2018-12-08 15:45:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:54,820 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-08 15:45:54,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 15:45:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-08 15:45:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:45:54,821 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:54,821 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:54,821 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:54,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1804435754, now seen corresponding path program 1 times [2018-12-08 15:45:54,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:54,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:54,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,823 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:54,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:54,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 15:45:54,860 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:54,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:45:54,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:45:54,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:45:54,861 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2018-12-08 15:45:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:54,874 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-08 15:45:54,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:45:54,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 15:45:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:54,875 INFO L225 Difference]: With dead ends: 29 [2018-12-08 15:45:54,875 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 15:45:54,876 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 [2018-12-08 15:45:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 15:45:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-12-08 15:45:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 15:45:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 15:45:54,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2018-12-08 15:45:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:54,878 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 15:45:54,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:45:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 15:45:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:45:54,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:54,879 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:54,879 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:54,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:54,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1804435808, now seen corresponding path program 1 times [2018-12-08 15:45:54,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:54,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:54,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,880 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:54,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:54,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:45:54,929 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:54,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:45:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:45:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:45:54,929 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-12-08 15:45:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:54,947 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-08 15:45:54,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:45:54,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 15:45:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:54,948 INFO L225 Difference]: With dead ends: 28 [2018-12-08 15:45:54,948 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 15:45:54,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:45:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 15:45:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-12-08 15:45:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 15:45:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-08 15:45:54,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2018-12-08 15:45:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:54,950 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-08 15:45:54,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:45:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-08 15:45:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 15:45:54,951 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:54,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:54,951 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:54,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:54,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1804435807, now seen corresponding path program 1 times [2018-12-08 15:45:54,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:54,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,952 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:54,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:54,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:45:54,964 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:54,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:45:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:45:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:45:54,965 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 3 states. [2018-12-08 15:45:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:54,979 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-12-08 15:45:54,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:45:54,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 15:45:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:54,980 INFO L225 Difference]: With dead ends: 23 [2018-12-08 15:45:54,980 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 15:45:54,980 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 [2018-12-08 15:45:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 15:45:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-08 15:45:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 15:45:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-12-08 15:45:54,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2018-12-08 15:45:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:54,982 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-12-08 15:45:54,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:45:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-12-08 15:45:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 15:45:54,982 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:54,982 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:54,983 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:54,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash -65428114, now seen corresponding path program 1 times [2018-12-08 15:45:54,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:54,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:54,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:54,984 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:45:55,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:55,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:45:55,012 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:55,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:45:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:45:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:45:55,013 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2018-12-08 15:45:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:55,024 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2018-12-08 15:45:55,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:45:55,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-12-08 15:45:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:55,025 INFO L225 Difference]: With dead ends: 20 [2018-12-08 15:45:55,025 INFO L226 Difference]: Without dead ends: 20 [2018-12-08 15:45:55,025 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 [2018-12-08 15:45:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-08 15:45:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-08 15:45:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-08 15:45:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-08 15:45:55,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2018-12-08 15:45:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:55,027 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-08 15:45:55,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:45:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-08 15:45:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 15:45:55,028 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:55,028 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:55,028 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:55,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash -65428061, now seen corresponding path program 1 times [2018-12-08 15:45:55,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:55,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:55,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,029 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:55,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:45:55,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 15:45:55,082 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:55,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:45:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:45:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 15:45:55,082 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-12-08 15:45:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:55,100 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-08 15:45:55,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:45:55,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-08 15:45:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:55,101 INFO L225 Difference]: With dead ends: 21 [2018-12-08 15:45:55,101 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 15:45:55,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 15:45:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 15:45:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-12-08 15:45:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 15:45:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 15:45:55,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2018-12-08 15:45:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:55,103 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 15:45:55,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:45:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 15:45:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-08 15:45:55,103 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:55,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:55,103 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:55,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 746182456, now seen corresponding path program 1 times [2018-12-08 15:45:55,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:55,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:55,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,104 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:55,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:55,122 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:45:55,123 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-12-08 15:45:55,124 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [14], [17], [19], [23], [34], [36], [38], [39], [40], [41] [2018-12-08 15:45:55,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:45:55,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:45:55,246 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:45:55,247 INFO L272 AbstractInterpreter]: Visited 15 different actions 30 times. Merged at 4 different actions 12 times. Never widened. Performed 162 root evaluator evaluations with a maximum evaluation depth of 3. Performed 162 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 19 variables. [2018-12-08 15:45:55,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:55,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:45:55,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:55,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 [2018-12-08 15:45:55,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:55,259 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:45:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:55,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:45:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:55,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:45:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:55,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:45:55,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-08 15:45:55,331 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:45:55,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:45:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:45:55,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 15:45:55,332 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-12-08 15:45:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:55,344 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-08 15:45:55,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 15:45:55,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-08 15:45:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:55,345 INFO L225 Difference]: With dead ends: 25 [2018-12-08 15:45:55,346 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 15:45:55,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-08 15:45:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 15:45:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-12-08 15:45:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 15:45:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-12-08 15:45:55,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2018-12-08 15:45:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:55,348 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-12-08 15:45:55,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:45:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-12-08 15:45:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 15:45:55,349 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:55,349 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:55,349 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:55,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash 11268501, now seen corresponding path program 2 times [2018-12-08 15:45:55,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:55,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:55,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:55,351 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:55,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:55,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:45:55,375 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:45:55,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:45:55,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:55,376 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 [2018-12-08 15:45:55,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:45:55,382 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 15:45:55,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-08 15:45:55,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:45:55,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:45:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 15:45:55,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:45:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 15:45:55,739 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:45:55,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 10 [2018-12-08 15:45:55,739 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:55,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:45:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:45:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2018-12-08 15:45:55,740 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2018-12-08 15:45:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:58,791 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-08 15:45:58,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:45:58,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 15:45:58,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:58,793 INFO L225 Difference]: With dead ends: 24 [2018-12-08 15:45:58,793 INFO L226 Difference]: Without dead ends: 22 [2018-12-08 15:45:58,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2018-12-08 15:45:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-08 15:45:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-08 15:45:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 15:45:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-08 15:45:58,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-12-08 15:45:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:58,796 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-08 15:45:58,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:45:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-08 15:45:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 15:45:58,797 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:58,797 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:58,797 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:58,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:58,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2061596911, now seen corresponding path program 1 times [2018-12-08 15:45:58,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:58,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:58,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:45:58,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:58,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:58,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:58,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:45:58,824 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-08 15:45:58,824 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [14], [17], [19], [23], [28], [30], [32], [36], [38], [39], [40], [41] [2018-12-08 15:45:58,825 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:45:58,825 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:45:58,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:45:58,852 INFO L272 AbstractInterpreter]: Visited 17 different actions 27 times. Merged at 4 different actions 8 times. Never widened. Performed 142 root evaluator evaluations with a maximum evaluation depth of 3. Performed 142 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 19 variables. [2018-12-08 15:45:58,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:58,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:45:58,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:58,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 [2018-12-08 15:45:58,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:58,861 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:45:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:58,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:45:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:58,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:45:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:58,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:45:58,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-08 15:45:58,914 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:45:58,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:45:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:45:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:45:58,915 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2018-12-08 15:45:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:45:58,927 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-08 15:45:58,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:45:58,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-08 15:45:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:45:58,928 INFO L225 Difference]: With dead ends: 29 [2018-12-08 15:45:58,929 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 15:45:58,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:45:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 15:45:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-12-08 15:45:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 15:45:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-08 15:45:58,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-12-08 15:45:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:45:58,931 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-08 15:45:58,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:45:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-08 15:45:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 15:45:58,931 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:45:58,932 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:45:58,932 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-08 15:45:58,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:45:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2055690322, now seen corresponding path program 2 times [2018-12-08 15:45:58,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:45:58,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:58,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:45:58,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:45:58,933 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:45:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:45:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:45:58,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:58,976 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:45:58,976 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:45:58,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:45:58,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:45:58,976 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/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 [2018-12-08 15:45:58,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:45:58,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 15:45:58,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-08 15:45:58,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:45:58,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:45:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 15:45:59,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:45:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 15:45:59,346 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:45:59,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 13 [2018-12-08 15:45:59,346 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:45:59,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:45:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:45:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2018-12-08 15:45:59,347 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 6 states. [2018-12-08 15:46:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:46:01,720 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-08 15:46:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 15:46:01,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 15:46:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:46:01,721 INFO L225 Difference]: With dead ends: 25 [2018-12-08 15:46:01,721 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 15:46:01,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2018-12-08 15:46:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 15:46:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 15:46:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 15:46:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 15:46:01,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-12-08 15:46:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:46:01,722 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 15:46:01,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:46:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 15:46:01,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 15:46:01,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:46:01 BoogieIcfgContainer [2018-12-08 15:46:01,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:46:01,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:46:01,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:46:01,726 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:46:01,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:45:54" (3/4) ... [2018-12-08 15:46:01,728 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 15:46:01,731 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 15:46:01,731 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 15:46:01,733 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-08 15:46:01,734 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-08 15:46:01,734 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 15:46:01,755 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f8bc7df6-834c-4b81-8677-d1f0ab0af0dd/bin-2019/utaipan/witness.graphml [2018-12-08 15:46:01,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:46:01,756 INFO L168 Benchmark]: Toolchain (without parser) took 7485.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 957.8 MB in the beginning and 873.7 MB in the end (delta: 84.0 MB). Peak memory consumption was 183.1 MB. Max. memory is 11.5 GB. [2018-12-08 15:46:01,757 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:46:01,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.23 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:46:01,757 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.33 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:46:01,757 INFO L168 Benchmark]: Boogie Preprocessor took 41.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-08 15:46:01,757 INFO L168 Benchmark]: RCFGBuilder took 161.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-12-08 15:46:01,758 INFO L168 Benchmark]: TraceAbstraction took 7114.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.7 MB in the end (delta: 204.2 MB). Peak memory consumption was 204.2 MB. Max. memory is 11.5 GB. [2018-12-08 15:46:01,758 INFO L168 Benchmark]: Witness Printer took 29.97 ms. Allocated memory is still 1.1 GB. Free memory is still 873.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:46:01,759 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 121.23 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.33 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 41.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 161.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7114.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.7 MB in the end (delta: 204.2 MB). Peak memory consumption was 204.2 MB. Max. memory is 11.5 GB. * Witness Printer took 29.97 ms. Allocated memory is still 1.1 GB. Free memory is still 873.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 12]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 12]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 7 error locations. SAFE Result, 7.0s OverallTime, 10 OverallIterations, 3 TraceHistogramMax, 5.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 159 SDtfs, 74 SDslu, 121 SDs, 0 SdLazy, 136 SolverSat, 14 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 216 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 278 ConstructedInterpolants, 4 QuantifiedInterpolants, 22941 SizeOfPredicates, 4 NumberOfNonLiveVariables, 251 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 18 InterpolantComputations, 10 PerfectInterpolantSequences, 45/87 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...