./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i --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_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 ed29e343041979fe95e5835578848b9a30317117 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 ed29e343041979fe95e5835578848b9a30317117 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:19:26,216 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 20:19:26,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 20:19:26,226 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 20:19:26,226 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 20:19:26,227 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 20:19:26,228 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 20:19:26,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 20:19:26,230 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 20:19:26,231 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 20:19:26,231 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 20:19:26,232 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 20:19:26,232 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 20:19:26,233 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 20:19:26,234 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 20:19:26,234 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 20:19:26,235 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 20:19:26,236 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 20:19:26,238 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 20:19:26,239 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 20:19:26,240 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 20:19:26,241 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 20:19:26,243 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 20:19:26,243 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 20:19:26,243 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 20:19:26,244 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 20:19:26,244 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 20:19:26,245 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 20:19:26,246 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 20:19:26,246 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 20:19:26,246 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 20:19:26,247 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 20:19:26,247 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 20:19:26,247 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 20:19:26,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 20:19:26,248 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 20:19:26,248 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-08 20:19:26,259 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 20:19:26,259 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 20:19:26,260 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 20:19:26,260 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 20:19:26,260 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 20:19:26,260 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 20:19:26,261 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 20:19:26,262 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 20:19:26,262 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 20:19:26,262 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 20:19:26,262 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 20:19:26,262 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 20:19:26,263 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 20:19:26,263 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:19:26,264 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 20:19:26,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 20:19:26,264 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_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 -> ed29e343041979fe95e5835578848b9a30317117 [2018-12-08 20:19:26,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 20:19:26,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 20:19:26,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 20:19:26,299 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 20:19:26,299 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 20:19:26,300 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:26,335 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/131918f0a/31f8bfe0d82b4a019dfb66df9ec12662/FLAGd4e5abbec [2018-12-08 20:19:26,765 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 20:19:26,765 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:26,772 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/131918f0a/31f8bfe0d82b4a019dfb66df9ec12662/FLAGd4e5abbec [2018-12-08 20:19:26,780 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/131918f0a/31f8bfe0d82b4a019dfb66df9ec12662 [2018-12-08 20:19:26,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 20:19:26,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 20:19:26,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 20:19:26,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 20:19:26,785 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 20:19:26,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:19:26" (1/1) ... [2018-12-08 20:19:26,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5fc0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:26, skipping insertion in model container [2018-12-08 20:19:26,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:19:26" (1/1) ... [2018-12-08 20:19:26,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 20:19:26,812 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 20:19:27,027 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:19:27,035 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 20:19:27,070 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:19:27,100 INFO L195 MainTranslator]: Completed translation [2018-12-08 20:19:27,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27 WrapperNode [2018-12-08 20:19:27,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 20:19:27,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 20:19:27,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 20:19:27,100 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 20:19:27,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 20:19:27,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 20:19:27,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 20:19:27,122 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 20:19:27,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... [2018-12-08 20:19:27,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 20:19:27,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 20:19:27,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 20:19:27,137 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 20:19:27,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 20:19:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-08 20:19:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-08 20:19:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 20:19:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 20:19:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 20:19:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 20:19:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 20:19:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-08 20:19:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-08 20:19:27,170 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-08 20:19:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 20:19:27,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 20:19:27,290 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 20:19:27,290 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 20:19:27,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:19:27 BoogieIcfgContainer [2018-12-08 20:19:27,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 20:19:27,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 20:19:27,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 20:19:27,293 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 20:19:27,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:19:26" (1/3) ... [2018-12-08 20:19:27,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae5250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:19:27, skipping insertion in model container [2018-12-08 20:19:27,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:27" (2/3) ... [2018-12-08 20:19:27,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae5250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:19:27, skipping insertion in model container [2018-12-08 20:19:27,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:19:27" (3/3) ... [2018-12-08 20:19:27,295 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:27,302 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 20:19:27,306 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-08 20:19:27,316 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-08 20:19:27,331 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 20:19:27,331 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 20:19:27,331 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 20:19:27,331 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 20:19:27,331 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 20:19:27,331 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 20:19:27,331 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 20:19:27,331 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 20:19:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-12-08 20:19:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:19:27,345 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,346 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,347 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1461646450, now seen corresponding path program 1 times [2018-12-08 20:19:27,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,387 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,472 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 20:19:27,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:27,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 20:19:27,473 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:27,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,485 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-12-08 20:19:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:27,520 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-12-08 20:19:27,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:27,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-08 20:19:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:27,527 INFO L225 Difference]: With dead ends: 45 [2018-12-08 20:19:27,527 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 20:19:27,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 20:19:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-12-08 20:19:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 20:19:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-12-08 20:19:27,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2018-12-08 20:19:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:27,553 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-12-08 20:19:27,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-12-08 20:19:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:19:27,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,554 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,554 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 281163885, now seen corresponding path program 1 times [2018-12-08 20:19:27,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,557 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,585 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 20:19:27,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:27,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 20:19:27,586 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:27,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 20:19:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 20:19:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:19:27,587 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-12-08 20:19:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:27,618 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-08 20:19:27,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 20:19:27,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-12-08 20:19:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:27,620 INFO L225 Difference]: With dead ends: 40 [2018-12-08 20:19:27,620 INFO L226 Difference]: Without dead ends: 37 [2018-12-08 20:19:27,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 20:19:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-08 20:19:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-12-08 20:19:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 20:19:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-08 20:19:27,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2018-12-08 20:19:27,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:27,625 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-08 20:19:27,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 20:19:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-08 20:19:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 20:19:27,625 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,626 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,626 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1352899899, now seen corresponding path program 1 times [2018-12-08 20:19:27,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:27,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:27,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:27,671 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:27,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,672 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-12-08 20:19:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:27,680 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-08 20:19:27,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:27,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-08 20:19:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:27,681 INFO L225 Difference]: With dead ends: 26 [2018-12-08 20:19:27,681 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 20:19:27,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 20:19:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-08 20:19:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 20:19:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-08 20:19:27,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-12-08 20:19:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:27,685 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-08 20:19:27,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-08 20:19:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:19:27,685 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,686 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,686 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1009776145, now seen corresponding path program 1 times [2018-12-08 20:19:27,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,687 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:27,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:27,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:27,718 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:27,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:27,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,719 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-12-08 20:19:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:27,756 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-08 20:19:27,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:27,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 20:19:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:27,756 INFO L225 Difference]: With dead ends: 31 [2018-12-08 20:19:27,757 INFO L226 Difference]: Without dead ends: 31 [2018-12-08 20:19:27,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-08 20:19:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-08 20:19:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 20:19:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-08 20:19:27,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2018-12-08 20:19:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:27,759 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-08 20:19:27,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-08 20:19:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:19:27,760 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,760 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,760 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1038405296, now seen corresponding path program 1 times [2018-12-08 20:19:27,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,762 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:27,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:27,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:27,788 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:27,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,789 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2018-12-08 20:19:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:27,797 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-08 20:19:27,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:27,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 20:19:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:27,797 INFO L225 Difference]: With dead ends: 36 [2018-12-08 20:19:27,797 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 20:19:27,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 20:19:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2018-12-08 20:19:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 20:19:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-08 20:19:27,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-12-08 20:19:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:27,800 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-08 20:19:27,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-08 20:19:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 20:19:27,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:27,800 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:27,800 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:27,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1238289479, now seen corresponding path program 1 times [2018-12-08 20:19:27,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:27,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:27,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:27,802 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:27,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:27,823 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:19:27,823 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-12-08 20:19:27,824 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [15], [18], [20], [22], [24], [25], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-08 20:19:27,843 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:19:27,843 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:19:27,930 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 20:19:27,931 INFO L272 AbstractInterpreter]: Visited 19 different actions 22 times. Never merged. Never widened. Performed 174 root evaluator evaluations with a maximum evaluation depth of 3. Performed 174 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-08 20:19:27,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:27,937 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 20:19:27,980 INFO L227 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 92.01% of their original sizes. [2018-12-08 20:19:27,980 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 20:19:28,009 INFO L418 sIntCurrentIteration]: We unified 21 AI predicates to 21 [2018-12-08 20:19:28,010 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 20:19:28,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 20:19:28,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 11 [2018-12-08 20:19:28,010 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:28,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 20:19:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 20:19:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-08 20:19:28,011 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-12-08 20:19:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:28,110 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-08 20:19:28,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:19:28,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-12-08 20:19:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:28,111 INFO L225 Difference]: With dead ends: 24 [2018-12-08 20:19:28,111 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 20:19:28,111 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-08 20:19:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 20:19:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 20:19:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 20:19:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 20:19:28,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-12-08 20:19:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:28,113 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 20:19:28,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 20:19:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 20:19:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:28,113 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:28,113 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:28,114 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:28,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:28,114 INFO L82 PathProgramCache]: Analyzing trace with hash -267731757, now seen corresponding path program 1 times [2018-12-08 20:19:28,114 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:28,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:28,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:28,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:28,115 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:28,192 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:19:28,193 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-08 20:19:28,193 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [15], [18], [20], [22], [24], [26], [27], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-08 20:19:28,194 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:19:28,194 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:19:28,212 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:19:28,212 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 179 root evaluator evaluations with a maximum evaluation depth of 3. Performed 179 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-08 20:19:28,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:28,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:19:28,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:28,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:28,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:28,223 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:19:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:28,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:28,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:28,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 20:19:28,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:28,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:28,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-08 20:19:28,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,297 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,297 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2018-12-08 20:19:28,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:28,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-08 20:19:28,345 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,349 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. [2018-12-08 20:19:28,350 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2018-12-08 20:19:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:28,414 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-08 20:19:28,449 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-08 20:19:28,455 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-12-08 20:19:28,502 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-12-08 20:19:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-08 20:19:28,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 17 [2018-12-08 20:19:28,576 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:19:28,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 20:19:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 20:19:28,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-08 20:19:28,577 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-12-08 20:19:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:28,665 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-08 20:19:28,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:19:28,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-08 20:19:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:28,665 INFO L225 Difference]: With dead ends: 40 [2018-12-08 20:19:28,665 INFO L226 Difference]: Without dead ends: 40 [2018-12-08 20:19:28,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-08 20:19:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-08 20:19:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-12-08 20:19:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 20:19:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 20:19:28,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-08 20:19:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:28,668 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 20:19:28,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 20:19:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 20:19:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:28,669 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:28,669 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:28,669 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:28,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1475078578, now seen corresponding path program 1 times [2018-12-08 20:19:28,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:28,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:28,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:28,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:28,670 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:28,731 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:19:28,731 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-08 20:19:28,731 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [5], [6], [7], [15], [18], [20], [22], [24], [26], [27], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-08 20:19:28,732 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:19:28,733 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:19:28,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:19:28,764 INFO L272 AbstractInterpreter]: Visited 21 different actions 29 times. Merged at 2 different actions 4 times. Never widened. Performed 199 root evaluator evaluations with a maximum evaluation depth of 3. Performed 199 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 24 variables. [2018-12-08 20:19:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:28,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:19:28,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:28,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:28,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:28,773 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:19:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:28,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:28,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:28,790 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,799 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,800 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-08 20:19:28,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:28,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-12-08 20:19:28,837 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,841 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:28,842 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:11 [2018-12-08 20:19:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:28,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:19:28,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2018-12-08 20:19:28,936 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:19:28,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 20:19:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 20:19:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2018-12-08 20:19:28,937 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 13 states. [2018-12-08 20:19:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:29,030 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-08 20:19:29,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 20:19:29,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2018-12-08 20:19:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:29,031 INFO L225 Difference]: With dead ends: 42 [2018-12-08 20:19:29,031 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 20:19:29,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2018-12-08 20:19:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 20:19:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-12-08 20:19:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 20:19:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 20:19:29,034 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-08 20:19:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:29,034 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 20:19:29,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 20:19:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 20:19:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:29,034 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:29,034 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:29,035 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:29,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1239820052, now seen corresponding path program 2 times [2018-12-08 20:19:29,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:29,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:29,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:29,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:29,036 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:29,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:29,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:19:29,059 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:19:29,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:19:29,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:29,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:29,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:19:29,066 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:19:29,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-08 20:19:29,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:19:29,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:29,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:29,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:19:29,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2018-12-08 20:19:29,123 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:19:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 20:19:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 20:19:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:19:29,124 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2018-12-08 20:19:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:29,132 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-08 20:19:29,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:29,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-08 20:19:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:29,133 INFO L225 Difference]: With dead ends: 27 [2018-12-08 20:19:29,133 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 20:19:29,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:19:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 20:19:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-08 20:19:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 20:19:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-08 20:19:29,135 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-12-08 20:19:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:29,135 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-08 20:19:29,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 20:19:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-08 20:19:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 20:19:29,135 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:29,135 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:29,135 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:29,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash -242442381, now seen corresponding path program 1 times [2018-12-08 20:19:29,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:19:29,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:29,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:19:29,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:19:29,136 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:19:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:29,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:29,383 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:19:29,383 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-08 20:19:29,383 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [13], [15], [18], [20], [22], [24], [26], [28], [32], [33], [34], [35], [37], [38], [39], [40], [41], [42] [2018-12-08 20:19:29,384 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:19:29,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:19:29,399 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:19:29,399 INFO L272 AbstractInterpreter]: Visited 23 different actions 26 times. Never merged. Never widened. Performed 182 root evaluator evaluations with a maximum evaluation depth of 3. Performed 182 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-08 20:19:29,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:29,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:19:29,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:29,401 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:29,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:29,410 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:19:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:29,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 20:19:32,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:32,900 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:19:32,901 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:209) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.convert(DerPreprocessor.java:190) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:253) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:211) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-08 20:19:32,905 INFO L168 Benchmark]: Toolchain (without parser) took 6122.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 213.4 MB). Free memory was 953.4 MB in the beginning and 1.0 GB in the end (delta: -84.2 MB). Peak memory consumption was 129.2 MB. Max. memory is 11.5 GB. [2018-12-08 20:19:32,907 INFO L168 Benchmark]: CDTParser took 0.16 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 20:19:32,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 953.4 MB in the beginning and 1.1 GB in the end (delta: -148.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2018-12-08 20:19:32,908 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:19:32,908 INFO L168 Benchmark]: Boogie Preprocessor took 14.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:19:32,908 INFO L168 Benchmark]: RCFGBuilder took 154.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2018-12-08 20:19:32,908 INFO L168 Benchmark]: TraceAbstraction took 5613.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.7 MB). Peak memory consumption was 126.4 MB. Max. memory is 11.5 GB. [2018-12-08 20:19:32,911 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 317.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 953.4 MB in the beginning and 1.1 GB in the end (delta: -148.6 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 154.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5613.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.7 MB). Peak memory consumption was 126.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-08 20:19:34,141 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 20:19:34,142 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 20:19:34,148 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 20:19:34,148 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 20:19:34,149 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 20:19:34,149 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 20:19:34,150 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 20:19:34,151 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 20:19:34,151 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 20:19:34,151 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 20:19:34,152 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 20:19:34,152 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 20:19:34,153 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 20:19:34,153 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 20:19:34,153 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 20:19:34,154 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 20:19:34,155 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 20:19:34,155 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 20:19:34,156 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 20:19:34,157 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 20:19:34,157 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 20:19:34,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 20:19:34,158 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 20:19:34,158 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 20:19:34,159 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 20:19:34,159 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 20:19:34,160 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 20:19:34,160 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 20:19:34,160 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 20:19:34,161 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 20:19:34,161 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 20:19:34,161 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 20:19:34,161 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 20:19:34,162 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 20:19:34,162 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 20:19:34,162 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-08 20:19:34,169 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 20:19:34,169 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 20:19:34,170 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 20:19:34,170 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 20:19:34,170 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 20:19:34,171 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 20:19:34,171 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 20:19:34,171 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 20:19:34,172 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 20:19:34,172 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:19:34,173 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-08 20:19:34,173 INFO L133 SettingsManager]: * Logic for external solver=AUFBV 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_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 -> ed29e343041979fe95e5835578848b9a30317117 [2018-12-08 20:19:34,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 20:19:34,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 20:19:34,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 20:19:34,204 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 20:19:34,204 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 20:19:34,205 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:34,250 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/4628e1a3a/1fbb234639884726bf402672ba3aa3b5/FLAG33e08ff28 [2018-12-08 20:19:34,605 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 20:19:34,605 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:34,612 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/4628e1a3a/1fbb234639884726bf402672ba3aa3b5/FLAG33e08ff28 [2018-12-08 20:19:34,621 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/data/4628e1a3a/1fbb234639884726bf402672ba3aa3b5 [2018-12-08 20:19:34,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 20:19:34,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 20:19:34,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 20:19:34,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 20:19:34,627 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 20:19:34,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:34,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d255691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34, skipping insertion in model container [2018-12-08 20:19:34,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:34,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 20:19:34,655 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 20:19:34,843 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:19:34,893 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 20:19:34,939 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:19:34,980 INFO L195 MainTranslator]: Completed translation [2018-12-08 20:19:34,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34 WrapperNode [2018-12-08 20:19:34,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 20:19:34,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 20:19:34,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 20:19:34,981 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 20:19:34,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:34,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 20:19:35,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 20:19:35,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 20:19:35,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 20:19:35,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... [2018-12-08 20:19:35,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 20:19:35,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 20:19:35,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 20:19:35,019 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 20:19:35,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/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 20:19:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 20:19:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-08 20:19:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-08 20:19:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 20:19:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 20:19:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 20:19:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 20:19:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 20:19:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-08 20:19:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-08 20:19:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-08 20:19:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 20:19:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 20:19:35,193 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 20:19:35,193 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 20:19:35,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:19:35 BoogieIcfgContainer [2018-12-08 20:19:35,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 20:19:35,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 20:19:35,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 20:19:35,196 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 20:19:35,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:19:34" (1/3) ... [2018-12-08 20:19:35,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333456ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:19:35, skipping insertion in model container [2018-12-08 20:19:35,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:19:34" (2/3) ... [2018-12-08 20:19:35,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333456ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:19:35, skipping insertion in model container [2018-12-08 20:19:35,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:19:35" (3/3) ... [2018-12-08 20:19:35,198 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-08 20:19:35,203 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 20:19:35,207 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-08 20:19:35,216 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-08 20:19:35,229 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 20:19:35,230 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 20:19:35,230 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 20:19:35,230 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 20:19:35,230 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 20:19:35,230 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 20:19:35,230 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 20:19:35,230 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 20:19:35,230 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 20:19:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-12-08 20:19:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:19:35,244 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,244 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,246 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1461646450, now seen corresponding path program 1 times [2018-12-08 20:19:35,254 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,255 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,347 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 20:19:35,348 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:35,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:35,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 20:19:35,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,361 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-12-08 20:19:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,412 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-12-08 20:19:35,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:35,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-08 20:19:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,420 INFO L225 Difference]: With dead ends: 45 [2018-12-08 20:19:35,420 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 20:19:35,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 20:19:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-12-08 20:19:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 20:19:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-12-08 20:19:35,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2018-12-08 20:19:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,446 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-12-08 20:19:35,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-12-08 20:19:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:19:35,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,447 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,447 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash 281163885, now seen corresponding path program 1 times [2018-12-08 20:19:35,448 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,448 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,486 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 20:19:35,486 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:35,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:35,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 20:19:35,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 20:19:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 20:19:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:19:35,488 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-12-08 20:19:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,522 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-08 20:19:35,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 20:19:35,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-12-08 20:19:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,523 INFO L225 Difference]: With dead ends: 40 [2018-12-08 20:19:35,523 INFO L226 Difference]: Without dead ends: 37 [2018-12-08 20:19:35,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 20:19:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-08 20:19:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-12-08 20:19:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 20:19:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-08 20:19:35,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2018-12-08 20:19:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-08 20:19:35,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 20:19:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-08 20:19:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 20:19:35,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,528 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,528 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1352899899, now seen corresponding path program 1 times [2018-12-08 20:19:35,529 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,529 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,587 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:35,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:35,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:35,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,588 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-12-08 20:19:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,596 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-08 20:19:35,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:35,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-08 20:19:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,597 INFO L225 Difference]: With dead ends: 26 [2018-12-08 20:19:35,597 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 20:19:35,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 20:19:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-08 20:19:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 20:19:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-08 20:19:35,599 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-12-08 20:19:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,599 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-08 20:19:35,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-08 20:19:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:19:35,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,600 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,600 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1009776145, now seen corresponding path program 1 times [2018-12-08 20:19:35,601 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,601 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:35,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:35,676 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:35,676 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 20:19:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,690 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:35,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:35,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:35,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,692 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-12-08 20:19:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,731 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-08 20:19:35,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:35,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 20:19:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,732 INFO L225 Difference]: With dead ends: 31 [2018-12-08 20:19:35,732 INFO L226 Difference]: Without dead ends: 31 [2018-12-08 20:19:35,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-08 20:19:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-08 20:19:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 20:19:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-08 20:19:35,737 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2018-12-08 20:19:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,737 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-08 20:19:35,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-08 20:19:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:19:35,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,738 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,738 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1038405296, now seen corresponding path program 1 times [2018-12-08 20:19:35,739 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,739 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,788 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:35,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:35,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:19:35,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,790 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2018-12-08 20:19:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,803 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-08 20:19:35,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:35,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 20:19:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,804 INFO L225 Difference]: With dead ends: 36 [2018-12-08 20:19:35,804 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 20:19:35,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 20:19:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2018-12-08 20:19:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 20:19:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-08 20:19:35,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-12-08 20:19:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,808 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-08 20:19:35,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-08 20:19:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 20:19:35,809 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,809 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,809 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1238289479, now seen corresponding path program 1 times [2018-12-08 20:19:35,810 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,810 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:35,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:19:35,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:35,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:35,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 20:19:35,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 4 [2018-12-08 20:19:35,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:35,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,963 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 5 states. [2018-12-08 20:19:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:35,972 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-08 20:19:35,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:35,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 20:19:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:35,972 INFO L225 Difference]: With dead ends: 24 [2018-12-08 20:19:35,972 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 20:19:35,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 20:19:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 20:19:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 20:19:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 20:19:35,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-12-08 20:19:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:35,975 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 20:19:35,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 20:19:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:35,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:35,976 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:35,976 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:35,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -267731757, now seen corresponding path program 1 times [2018-12-08 20:19:35,976 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:35,976 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:35,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:36,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:36,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:36,040 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:36,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:36,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-08 20:19:36,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:36,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:36,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-08 20:19:36,077 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:36,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:36,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2018-12-08 20:19:36,115 INFO L683 Elim1Store]: detected equality via solver [2018-12-08 20:19:36,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2018-12-08 20:19:36,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:36,124 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. [2018-12-08 20:19:36,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:12 [2018-12-08 20:19:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:36,196 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:36,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:36,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-08 20:19:36,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 20:19:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 20:19:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:19:36,198 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-12-08 20:19:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:38,303 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-08 20:19:38,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:19:38,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-08 20:19:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:38,304 INFO L225 Difference]: With dead ends: 40 [2018-12-08 20:19:38,304 INFO L226 Difference]: Without dead ends: 40 [2018-12-08 20:19:38,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:19:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-08 20:19:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-12-08 20:19:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 20:19:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 20:19:38,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-08 20:19:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:38,308 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 20:19:38,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 20:19:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 20:19:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:38,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:38,309 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:38,309 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:38,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1475078578, now seen corresponding path program 1 times [2018-12-08 20:19:38,310 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:38,310 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:38,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:38,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:38,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:38,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,386 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,386 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-08 20:19:38,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:38,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 23 [2018-12-08 20:19:38,448 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:13 [2018-12-08 20:19:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:38,466 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:38,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:38,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:19:38,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:19:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:38,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:38,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-08 20:19:38,594 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-08 20:19:38,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:38,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 23 [2018-12-08 20:19:38,606 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,615 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:38,615 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:13 [2018-12-08 20:19:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:38,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:19:38,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 20:19:38,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 14 [2018-12-08 20:19:38,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 20:19:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 20:19:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=164, Unknown=3, NotChecked=0, Total=210 [2018-12-08 20:19:38,705 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2018-12-08 20:19:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:39,162 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-08 20:19:39,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 20:19:39,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2018-12-08 20:19:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:39,163 INFO L225 Difference]: With dead ends: 42 [2018-12-08 20:19:39,163 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 20:19:39,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=372, Unknown=4, NotChecked=0, Total=462 [2018-12-08 20:19:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 20:19:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-12-08 20:19:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 20:19:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 20:19:39,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-08 20:19:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:39,166 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 20:19:39,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 20:19:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 20:19:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 20:19:39,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:39,167 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:39,167 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:39,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1239820052, now seen corresponding path program 2 times [2018-12-08 20:19:39,167 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:39,167 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:39,188 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-08 20:19:39,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 20:19:39,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:19:39,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:39,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:39,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:19:39,263 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:19:39,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 20:19:39,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 20:19:39,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:19:39,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:39,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:19:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:19:39,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 20:19:39,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 4 [2018-12-08 20:19:39,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:19:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:19:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:39,313 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-12-08 20:19:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:19:39,327 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-12-08 20:19:39,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:19:39,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-08 20:19:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:19:39,328 INFO L225 Difference]: With dead ends: 35 [2018-12-08 20:19:39,328 INFO L226 Difference]: Without dead ends: 35 [2018-12-08 20:19:39,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:19:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-08 20:19:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2018-12-08 20:19:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 20:19:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-08 20:19:39,330 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23 [2018-12-08 20:19:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:19:39,330 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-08 20:19:39,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:19:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-08 20:19:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 20:19:39,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:19:39,331 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:19:39,331 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:19:39,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:19:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash -242442381, now seen corresponding path program 1 times [2018-12-08 20:19:39,332 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:19:39,332 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:19:39,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:19:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:19:39,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:19:39,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2018-12-08 20:19:39,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:39,418 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 9 [2018-12-08 20:19:39,418 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 20:19:39,422 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:19:39,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2018-12-08 20:19:39,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:19:39,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 15 [2018-12-08 20:19:39,434 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-12-08 20:19:39,442 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-08 20:19:39,449 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 2 xjuncts. [2018-12-08 20:19:39,450 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:18, output treesize:19 [2018-12-08 20:19:47,695 WARN L180 SmtUtils]: Spent 4.54 s on a formula simplification that was a NOOP. DAG size: 24 [2018-12-08 20:19:49,769 WARN L180 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2018-12-08 20:19:50,585 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32)) (v_prenex_2 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)))) (let ((.cse1 (store .cse0 v_prenex_2 (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 v_prenex_2)) (= |c_#valid| (store .cse1 entry_point_~p~0.base (_ bv0 1))) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)) (= (_ bv1 1) (select .cse1 entry_point_~p~0.base)) (not (= (_ bv0 32) entry_point_~p~0.base)))))) is different from true [2018-12-08 20:19:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 20:19:50,641 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 20:19:50,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:19:50,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-08 20:19:50,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 20:19:50,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 20:19:50,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=4, NotChecked=24, Total=210 [2018-12-08 20:19:50,644 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2018-12-08 20:20:00,860 WARN L180 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-12-08 20:20:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:08,990 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-12-08 20:20:08,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 20:20:08,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-12-08 20:20:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:08,991 INFO L225 Difference]: With dead ends: 42 [2018-12-08 20:20:08,991 INFO L226 Difference]: Without dead ends: 34 [2018-12-08 20:20:08,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=4, NotChecked=26, Total=240 [2018-12-08 20:20:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-08 20:20:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2018-12-08 20:20:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-08 20:20:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-12-08 20:20:08,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 26 [2018-12-08 20:20:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:08,995 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-12-08 20:20:08,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 20:20:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-12-08 20:20:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 20:20:08,996 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:08,996 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:08,996 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:20:08,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2039393740, now seen corresponding path program 1 times [2018-12-08 20:20:08,996 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:20:08,996 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:20:09,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:09,085 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2018-12-08 20:20:09,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:20:09,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-08 20:20:09,089 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:09,095 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:20:09,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-08 20:20:09,103 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:18 [2018-12-08 20:20:09,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-12-08 20:20:09,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-08 20:20:09,118 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:09,119 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:20:09,123 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-08 20:20:09,123 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:20, output treesize:13 [2018-12-08 20:20:12,933 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)) (_ bv0 32) (_ bv0 1)))) (and (= |c_#valid| (store .cse0 entry_point_~p~0.base (_ bv0 1))) (= (_ bv1 1) (select .cse0 entry_point_~p~0.base)) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)) (not (= (_ bv0 32) entry_point_~p~0.base))))) is different from true [2018-12-08 20:20:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:20:14,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:16,026 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~p~0.base_14 (_ BitVec 32))) (or (= (_ bv0 32) v_entry_point_~p~0.base_14) (not (= (select |c_#valid| v_entry_point_~p~0.base_14) (_ bv0 1))) (= (store (store (store |c_#valid| v_entry_point_~p~0.base_14 (_ bv1 1)) (_ bv0 32) (_ bv0 1)) v_entry_point_~p~0.base_14 (_ bv0 1)) |c_old(#valid)|))) is different from false [2018-12-08 20:20:16,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:16,029 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:20:16,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:16,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:16,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-08 20:20:16,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-08 20:20:16,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-12-08 20:20:16,055 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:16,060 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:20:16,065 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. [2018-12-08 20:20:16,065 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2018-12-08 20:20:18,166 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32))) (and (= |c_#valid| (store (store (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)) (_ bv0 32) (_ bv0 1)) entry_point_~p~0.base (_ bv0 1))) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)))) is different from true [2018-12-08 20:20:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:20:18,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:20,260 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~p~0.base_17 (_ BitVec 32))) (or (= (store (store (store |c_#valid| v_entry_point_~p~0.base_17 (_ bv1 1)) (_ bv0 32) (_ bv0 1)) v_entry_point_~p~0.base_17 (_ bv0 1)) |c_old(#valid)|) (not (= (_ bv0 1) (select |c_#valid| v_entry_point_~p~0.base_17))))) is different from false [2018-12-08 20:20:20,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 20:20:20,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 20 [2018-12-08 20:20:20,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 20:20:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 20:20:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=289, Unknown=6, NotChecked=148, Total=506 [2018-12-08 20:20:20,277 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 21 states. [2018-12-08 20:20:34,438 WARN L180 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2018-12-08 20:20:42,538 WARN L180 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2018-12-08 20:20:56,803 WARN L180 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-12-08 20:21:10,170 WARN L180 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-12-08 20:21:20,249 WARN L180 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2018-12-08 20:21:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:21:20,250 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-08 20:21:20,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 20:21:20,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2018-12-08 20:21:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:21:20,251 INFO L225 Difference]: With dead ends: 39 [2018-12-08 20:21:20,251 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 20:21:20,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=133, Invalid=624, Unknown=15, NotChecked=220, Total=992 [2018-12-08 20:21:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 20:21:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-12-08 20:21:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 20:21:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-08 20:21:20,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2018-12-08 20:21:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:21:20,254 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-08 20:21:20,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 20:21:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-08 20:21:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 20:21:20,255 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:21:20,255 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:21:20,255 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-08 20:21:20,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:21:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1239514734, now seen corresponding path program 2 times [2018-12-08 20:21:20,255 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 20:21:20,256 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 20:21:20,270 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-08 20:21:20,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 20:21:20,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:21:20,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:21:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:21:20,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:21:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:21:20,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:21:20,347 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:21:20,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 20:21:20,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 20:21:20,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:21:20,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:21:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:21:20,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:21:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:21:20,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 20:21:20,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 6 [2018-12-08 20:21:20,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 20:21:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 20:21:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-08 20:21:20,416 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2018-12-08 20:21:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:21:20,429 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2018-12-08 20:21:20,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 20:21:20,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-12-08 20:21:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:21:20,429 INFO L225 Difference]: With dead ends: 20 [2018-12-08 20:21:20,430 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 20:21:20,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-08 20:21:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 20:21:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 20:21:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 20:21:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 20:21:20,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-12-08 20:21:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:21:20,430 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 20:21:20,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 20:21:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 20:21:20,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 20:21:20,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:21:20 BoogieIcfgContainer [2018-12-08 20:21:20,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 20:21:20,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 20:21:20,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 20:21:20,434 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 20:21:20,434 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:19:35" (3/4) ... [2018-12-08 20:21:20,436 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 20:21:20,440 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2018-12-08 20:21:20,440 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 20:21:20,441 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 20:21:20,441 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure entry_point [2018-12-08 20:21:20,444 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-12-08 20:21:20,444 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-08 20:21:20,444 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 20:21:20,468 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6d72cb03-0d9e-49db-ac68-aebac46ded3b/bin-2019/utaipan/witness.graphml [2018-12-08 20:21:20,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 20:21:20,469 INFO L168 Benchmark]: Toolchain (without parser) took 105845.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.7 MB). Free memory was 936.7 MB in the beginning and 1.2 GB in the end (delta: -250.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:21:20,470 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:21:20,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 936.7 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 37.1 MB. Max. memory is 11.5 GB. [2018-12-08 20:21:20,470 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:21:20,470 INFO L168 Benchmark]: Boogie Preprocessor took 16.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:21:20,471 INFO L168 Benchmark]: RCFGBuilder took 174.69 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2018-12-08 20:21:20,471 INFO L168 Benchmark]: TraceAbstraction took 105239.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -83.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:21:20,471 INFO L168 Benchmark]: Witness Printer took 35.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2018-12-08 20:21:20,473 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 356.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 936.7 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 37.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.63 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.69 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 105239.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -83.9 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 35.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1442]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1438]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1437]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1437]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1438]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 5 error locations. SAFE Result, 105.2s OverallTime, 12 OverallIterations, 2 TraceHistogramMax, 81.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 322 SDtfs, 131 SDslu, 892 SDs, 0 SdLazy, 883 SolverSat, 118 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 46.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 476 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 57.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 67 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 383 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 546 ConstructedInterpolants, 33 QuantifiedInterpolants, 61871 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1319 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 56/92 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...