./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_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_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:17:28,400 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:17:28,401 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:17:28,407 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:17:28,407 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:17:28,407 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:17:28,408 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:17:28,409 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:17:28,409 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:17:28,410 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:17:28,410 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:17:28,411 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:17:28,411 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:17:28,412 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:17:28,412 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:17:28,412 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:17:28,413 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:17:28,414 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:17:28,415 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:17:28,415 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:17:28,416 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:17:28,417 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:17:28,418 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:17:28,418 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:17:28,418 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:17:28,418 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:17:28,419 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:17:28,419 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:17:28,420 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:17:28,420 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:17:28,420 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:17:28,421 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:17:28,421 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:17:28,421 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:17:28,421 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:17:28,422 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:17:28,422 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 19:17:28,429 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:17:28,429 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:17:28,430 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:17:28,430 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:17:28,430 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:17:28,430 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:17:28,430 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:17:28,431 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:17:28,432 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 19:17:28,432 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 19:17:28,432 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:17:28,432 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:17:28,432 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 19:17:28,432 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:17:28,432 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:17:28,433 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:17:28,433 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:17:28,434 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:17:28,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:17:28,435 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_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 -> 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 [2018-12-09 19:17:28,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:17:28,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:17:28,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:17:28,462 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:17:28,462 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:17:28,462 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:28,498 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/01d46793b/bc243d7212df4e22a18ff21dd802d019/FLAGcac733c31 [2018-12-09 19:17:28,955 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:17:28,956 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:28,963 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/01d46793b/bc243d7212df4e22a18ff21dd802d019/FLAGcac733c31 [2018-12-09 19:17:28,972 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/01d46793b/bc243d7212df4e22a18ff21dd802d019 [2018-12-09 19:17:28,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:17:28,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:17:28,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:17:28,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:17:28,977 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:17:28,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:28" (1/1) ... [2018-12-09 19:17:28,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee6021e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:28, skipping insertion in model container [2018-12-09 19:17:28,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:28" (1/1) ... [2018-12-09 19:17:28,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:17:29,006 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:17:29,245 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:17:29,254 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:17:29,287 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:17:29,318 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:17:29,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29 WrapperNode [2018-12-09 19:17:29,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:17:29,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:17:29,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:17:29,320 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:17:29,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:17:29,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:17:29,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:17:29,342 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:17:29,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... [2018-12-09 19:17:29,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:17:29,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:17:29,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:17:29,360 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:17:29,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:17:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:17:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-09 19:17:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-09 19:17:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:17:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:17:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:17:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-09 19:17:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-09 19:17:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:17:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:17:29,537 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:17:29,537 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 19:17:29,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:29 BoogieIcfgContainer [2018-12-09 19:17:29,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:17:29,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:17:29,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:17:29,539 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:17:29,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:17:28" (1/3) ... [2018-12-09 19:17:29,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c6263e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:29, skipping insertion in model container [2018-12-09 19:17:29,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:29" (2/3) ... [2018-12-09 19:17:29,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c6263e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:29, skipping insertion in model container [2018-12-09 19:17:29,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:29" (3/3) ... [2018-12-09 19:17:29,541 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:29,547 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:17:29,550 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-09 19:17:29,561 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-09 19:17:29,578 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:17:29,578 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 19:17:29,578 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:17:29,578 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:17:29,578 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:17:29,578 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:17:29,579 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:17:29,579 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:17:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-09 19:17:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:17:29,594 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:29,595 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:29,596 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:29,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2013139840, now seen corresponding path program 1 times [2018-12-09 19:17:29,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:29,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:29,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,636 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:29,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:29,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:17:29,732 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:29,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:29,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:29,745 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2018-12-09 19:17:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:29,802 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2018-12-09 19:17:29,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:29,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 19:17:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:29,808 INFO L225 Difference]: With dead ends: 63 [2018-12-09 19:17:29,809 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 19:17:29,810 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 [2018-12-09 19:17:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 19:17:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2018-12-09 19:17:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 19:17:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-12-09 19:17:29,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2018-12-09 19:17:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:29,835 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-12-09 19:17:29,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-12-09 19:17:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:17:29,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:29,836 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:29,836 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:29,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -539017121, now seen corresponding path program 1 times [2018-12-09 19:17:29,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:29,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:29,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,838 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:29,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:29,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:17:29,863 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:29,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 19:17:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 19:17:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:17:29,864 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 3 states. [2018-12-09 19:17:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:29,904 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-12-09 19:17:29,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 19:17:29,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-12-09 19:17:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:29,905 INFO L225 Difference]: With dead ends: 60 [2018-12-09 19:17:29,905 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 19:17:29,906 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 [2018-12-09 19:17:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 19:17:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2018-12-09 19:17:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 19:17:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2018-12-09 19:17:29,910 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 17 [2018-12-09 19:17:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:29,910 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2018-12-09 19:17:29,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 19:17:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2018-12-09 19:17:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 19:17:29,910 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:29,911 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:29,911 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:29,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437412, now seen corresponding path program 1 times [2018-12-09 19:17:29,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:29,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:29,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:29,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:17:29,955 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:29,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:29,956 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 5 states. [2018-12-09 19:17:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:29,995 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2018-12-09 19:17:29,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:29,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-12-09 19:17:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:29,996 INFO L225 Difference]: With dead ends: 58 [2018-12-09 19:17:29,996 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 19:17:29,996 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 [2018-12-09 19:17:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 19:17:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-12-09 19:17:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-09 19:17:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2018-12-09 19:17:30,001 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 18 [2018-12-09 19:17:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:30,001 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2018-12-09 19:17:30,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2018-12-09 19:17:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 19:17:30,002 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:30,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:30,002 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:30,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437411, now seen corresponding path program 1 times [2018-12-09 19:17:30,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:30,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:30,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:30,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:30,004 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:30,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:30,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:17:30,041 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:30,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:17:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:17:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:30,042 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 4 states. [2018-12-09 19:17:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:30,068 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2018-12-09 19:17:30,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:17:30,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-09 19:17:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:30,069 INFO L225 Difference]: With dead ends: 81 [2018-12-09 19:17:30,069 INFO L226 Difference]: Without dead ends: 81 [2018-12-09 19:17:30,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-09 19:17:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2018-12-09 19:17:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 19:17:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2018-12-09 19:17:30,073 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 18 [2018-12-09 19:17:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:30,074 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2018-12-09 19:17:30,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:17:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2018-12-09 19:17:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:30,074 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:30,074 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] [2018-12-09 19:17:30,074 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:30,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427199, now seen corresponding path program 1 times [2018-12-09 19:17:30,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:30,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:30,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:30,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:30,076 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:30,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:30,146 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:17:30,146 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-09 19:17:30,147 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [14], [16], [20], [28], [30], [35], [37], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-09 19:17:30,167 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:17:30,168 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:17:30,261 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:17:30,261 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 176 root evaluator evaluations with a maximum evaluation depth of 3. Performed 176 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 27 variables. [2018-12-09 19:17:30,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:30,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:17:30,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:30,267 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:17:30,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:30,273 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:17:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:30,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:30,318 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 [2018-12-09 19:17:30,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:30,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:30,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 19:17:30,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:30,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:30,345 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 [2018-12-09 19:17:30,345 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:30,353 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-09 19:17:30,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-09 19:17:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:30,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:30,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:17:30,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2018-12-09 19:17:30,546 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:17:30,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 19:17:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 19:17:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-12-09 19:17:30,547 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 9 states. [2018-12-09 19:17:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:33,465 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2018-12-09 19:17:33,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:17:33,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-12-09 19:17:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:33,466 INFO L225 Difference]: With dead ends: 136 [2018-12-09 19:17:33,467 INFO L226 Difference]: Without dead ends: 136 [2018-12-09 19:17:33,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-12-09 19:17:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-09 19:17:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 62. [2018-12-09 19:17:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 19:17:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2018-12-09 19:17:33,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 23 [2018-12-09 19:17:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:33,472 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2018-12-09 19:17:33,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 19:17:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2018-12-09 19:17:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:33,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:33,473 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] [2018-12-09 19:17:33,473 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:33,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427198, now seen corresponding path program 1 times [2018-12-09 19:17:33,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:33,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:33,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:33,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:33,475 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:33,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:33,571 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:17:33,571 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-09 19:17:33,572 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [14], [16], [20], [28], [30], [35], [38], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-09 19:17:33,572 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:17:33,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:17:33,603 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:17:33,603 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 177 root evaluator evaluations with a maximum evaluation depth of 4. Performed 177 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 27 variables. [2018-12-09 19:17:33,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:33,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:17:33,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:33,605 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:17:33,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:33,612 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:17:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:33,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:33,631 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 [2018-12-09 19:17:33,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,642 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 [2018-12-09 19:17:33,643 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,648 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:19, output treesize:14 [2018-12-09 19:17:33,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:33,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:33,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 4 [2018-12-09 19:17:33,682 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,691 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 15 [2018-12-09 19:17:33,691 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:33,697 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:12 [2018-12-09 19:17:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:33,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:33,767 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2018-12-09 19:17:46,409 WARN L180 SmtUtils]: Spent 8.54 s on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2018-12-09 19:17:46,414 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-12-09 19:17:46,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-12-09 19:17:46,545 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2018-12-09 19:17:46,560 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-12-09 19:17:46,560 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2018-12-09 19:17:46,561 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,567 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:26, output treesize:5 [2018-12-09 19:17:46,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-12-09 19:17:46,662 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2018-12-09 19:17:46,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2018-12-09 19:17:46,679 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,679 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-12-09 19:17:46,680 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,683 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:46,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-09 19:17:46,688 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:31, output treesize:14 [2018-12-09 19:17:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:46,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:17:46,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-12-09 19:17:46,732 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:17:46,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 19:17:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 19:17:46,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=293, Unknown=2, NotChecked=0, Total=342 [2018-12-09 19:17:46,732 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 11 states. [2018-12-09 19:17:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:47,155 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2018-12-09 19:17:47,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 19:17:47,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-12-09 19:17:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:47,156 INFO L225 Difference]: With dead ends: 148 [2018-12-09 19:17:47,156 INFO L226 Difference]: Without dead ends: 148 [2018-12-09 19:17:47,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=138, Invalid=672, Unknown=2, NotChecked=0, Total=812 [2018-12-09 19:17:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-09 19:17:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 66. [2018-12-09 19:17:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 19:17:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2018-12-09 19:17:47,164 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 23 [2018-12-09 19:17:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:47,164 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2018-12-09 19:17:47,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 19:17:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2018-12-09 19:17:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:47,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:47,165 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] [2018-12-09 19:17:47,165 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:47,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2134985824, now seen corresponding path program 1 times [2018-12-09 19:17:47,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:47,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,167 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 19:17:47,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:47,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:17:47,199 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-09 19:17:47,200 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [5], [6], [7], [14], [16], [20], [28], [30], [35], [37], [66], [67], [68], [70], [72], [73], [74], [75] [2018-12-09 19:17:47,200 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:17:47,200 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:17:47,231 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:17:47,232 INFO L272 AbstractInterpreter]: Visited 21 different actions 29 times. Merged at 2 different actions 4 times. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 3. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-12-09 19:17:47,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:47,236 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:17:47,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:47,236 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:17:47,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:47,243 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:17:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:47,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:47,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 19:17:47,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:17:47,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 5 [2018-12-09 19:17:47,304 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:47,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:47,304 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 5 states. [2018-12-09 19:17:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:47,312 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2018-12-09 19:17:47,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:47,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-09 19:17:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:47,312 INFO L225 Difference]: With dead ends: 46 [2018-12-09 19:17:47,313 INFO L226 Difference]: Without dead ends: 44 [2018-12-09 19:17:47,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-09 19:17:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-09 19:17:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 19:17:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2018-12-09 19:17:47,315 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2018-12-09 19:17:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:47,315 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2018-12-09 19:17:47,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2018-12-09 19:17:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:17:47,315 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:47,315 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] [2018-12-09 19:17:47,316 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:47,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1783473613, now seen corresponding path program 1 times [2018-12-09 19:17:47,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:47,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:47,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,317 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 19:17:47,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:47,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:17:47,334 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:47,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:47,335 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2018-12-09 19:17:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:47,352 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2018-12-09 19:17:47,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 19:17:47,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-09 19:17:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:47,353 INFO L225 Difference]: With dead ends: 70 [2018-12-09 19:17:47,353 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 19:17:47,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:17:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 19:17:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-12-09 19:17:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 19:17:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-12-09 19:17:47,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2018-12-09 19:17:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:47,357 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-12-09 19:17:47,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-12-09 19:17:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:17:47,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:47,358 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] [2018-12-09 19:17:47,358 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:47,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -768683348, now seen corresponding path program 1 times [2018-12-09 19:17:47,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,360 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 19:17:47,379 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:47,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:17:47,379 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:17:47,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:17:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:17:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:47,379 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 4 states. [2018-12-09 19:17:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:47,397 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2018-12-09 19:17:47,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:47,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-09 19:17:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:47,398 INFO L225 Difference]: With dead ends: 53 [2018-12-09 19:17:47,398 INFO L226 Difference]: Without dead ends: 53 [2018-12-09 19:17:47,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-09 19:17:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-12-09 19:17:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 19:17:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2018-12-09 19:17:47,401 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2018-12-09 19:17:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:47,401 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2018-12-09 19:17:47,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:17:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2018-12-09 19:17:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 19:17:47,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:47,402 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, 1] [2018-12-09 19:17:47,402 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3REQUIRES_VIOLATION]=== [2018-12-09 19:17:47,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 29629726, now seen corresponding path program 1 times [2018-12-09 19:17:47,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:17:47,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:47,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:17:47,404 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:17:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:17:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:17:47,430 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:17:47,440 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 19:17:47,447 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 42 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 19:17:47,447 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 41 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 19:17:47,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:17:47 BoogieIcfgContainer [2018-12-09 19:17:47,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:17:47,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:17:47,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:17:47,454 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:17:47,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:29" (3/4) ... [2018-12-09 19:17:47,456 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 19:17:47,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:17:47,457 INFO L168 Benchmark]: Toolchain (without parser) took 18482.97 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 239.6 MB). Free memory was 953.5 MB in the beginning and 1.0 GB in the end (delta: -48.0 MB). Peak memory consumption was 191.6 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:47,457 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:17:47,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.8 MB). Free memory was 953.5 MB in the beginning and 1.2 GB in the end (delta: -201.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:47,458 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.14 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:47,458 INFO L168 Benchmark]: Boogie Preprocessor took 17.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:17:47,459 INFO L168 Benchmark]: RCFGBuilder took 177.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:47,459 INFO L168 Benchmark]: TraceAbstraction took 17915.42 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.3 MB). Peak memory consumption was 182.1 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:47,459 INFO L168 Benchmark]: Witness Printer took 2.88 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:17:47,461 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 344.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.8 MB). Free memory was 953.5 MB in the beginning and 1.2 GB in the end (delta: -201.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.14 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 177.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17915.42 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 122.3 MB). Peak memory consumption was 182.1 MB. Max. memory is 11.5 GB. * Witness Printer took 2.88 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 42 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 41 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1458]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1458. Possible FailurePath: [L1135] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [\old(ldv_global_msg_list)=null, \old(ldv_global_msg_list)=null, ldv_global_msg_list={44:0}] [L1459] CALL entry_point() VAL [ldv_global_msg_list={44:0}] [L1439] int len = 10; VAL [ldv_global_msg_list={44:0}, len=10] [L1440] CALL, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [\old(size)=40, ldv_global_msg_list={44:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=40, \result={45:0}, ldv_global_msg_list={44:0}, malloc(size)={45:0}, size=40] [L1440] RET, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [ldv_global_msg_list={44:0}, ldv_malloc(sizeof(struct A18*)*len)={45:0}, len=10] [L1440] struct A18 **array = (struct A18 **)ldv_malloc(sizeof(struct A18*)*len); [L1441] struct A18 *p; [L1442] int i=0; [L1443] int j; VAL [array={45:0}, i=0, ldv_global_msg_list={44:0}, len=10] [L1444] COND FALSE !(!array) VAL [array={45:0}, i=0, ldv_global_msg_list={44:0}, len=10] [L1445] COND TRUE i=0) VAL [array={45:0}, i=0, j=-1, ldv_global_msg_list={44:0}, len=10, p={0:0}] [L1459] RET entry_point() VAL [ldv_global_msg_list={44:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 7 error locations. UNSAFE Result, 17.8s OverallTime, 10 OverallIterations, 2 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 428 SDtfs, 405 SDslu, 1084 SDs, 0 SdLazy, 911 SolverSat, 76 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 240 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 312 ConstructedInterpolants, 28 QuantifiedInterpolants, 37416 SizeOfPredicates, 14 NumberOfNonLiveVariables, 402 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 25/44 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:17:48,772 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:17:48,773 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:17:48,779 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:17:48,779 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:17:48,780 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:17:48,780 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:17:48,781 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:17:48,782 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:17:48,782 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:17:48,783 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:17:48,783 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:17:48,783 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:17:48,784 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:17:48,784 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:17:48,785 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:17:48,785 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:17:48,786 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:17:48,787 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:17:48,787 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:17:48,788 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:17:48,788 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:17:48,790 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:17:48,790 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:17:48,790 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:17:48,790 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:17:48,791 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:17:48,791 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:17:48,791 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:17:48,792 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:17:48,792 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:17:48,792 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:17:48,792 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:17:48,793 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:17:48,793 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:17:48,793 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:17:48,794 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-09 19:17:48,801 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:17:48,801 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:17:48,802 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:17:48,802 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:17:48,802 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:17:48,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 19:17:48,803 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 19:17:48,803 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 19:17:48,804 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:17:48,804 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:17:48,805 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:17:48,805 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:17:48,805 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 19:17:48,805 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:17:48,805 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 19:17:48,805 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_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 -> 1e7b1c8d88255aaa07a4a2fabadf999511fb9c76 [2018-12-09 19:17:48,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:17:48,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:17:48,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:17:48,833 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:17:48,833 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:17:48,834 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:48,868 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/5ec52d216/655721298ef74add8456cd4dea4d0145/FLAGe55aa5768 [2018-12-09 19:17:49,222 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:17:49,223 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/sv-benchmarks/c/ldv-memsafety/memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:49,231 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/5ec52d216/655721298ef74add8456cd4dea4d0145/FLAGe55aa5768 [2018-12-09 19:17:49,600 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/data/5ec52d216/655721298ef74add8456cd4dea4d0145 [2018-12-09 19:17:49,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:17:49,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:17:49,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:17:49,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:17:49,605 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:17:49,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f9a46a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49, skipping insertion in model container [2018-12-09 19:17:49,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:17:49,635 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:17:49,825 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:17:49,838 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:17:49,911 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:17:49,944 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:17:49,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49 WrapperNode [2018-12-09 19:17:49,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:17:49,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:17:49,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:17:49,945 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:17:49,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:17:49,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:17:49,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:17:49,966 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:17:49,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... [2018-12-09 19:17:49,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:17:49,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:17:49,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:17:49,985 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:17:49,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:17:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:17:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-09 19:17:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-09 19:17:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:17:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:17:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-09 19:17:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-09 19:17:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:17:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:17:50,184 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:17:50,185 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 19:17:50,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:50 BoogieIcfgContainer [2018-12-09 19:17:50,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:17:50,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:17:50,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:17:50,187 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:17:50,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:17:49" (1/3) ... [2018-12-09 19:17:50,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eea6d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:50, skipping insertion in model container [2018-12-09 19:17:50,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:49" (2/3) ... [2018-12-09 19:17:50,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eea6d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:50, skipping insertion in model container [2018-12-09 19:17:50,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:50" (3/3) ... [2018-12-09 19:17:50,189 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_1_false-valid-memtrack_true-termination.i [2018-12-09 19:17:50,194 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:17:50,199 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-09 19:17:50,207 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-09 19:17:50,222 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 19:17:50,222 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:17:50,222 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 19:17:50,222 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:17:50,222 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:17:50,223 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:17:50,223 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:17:50,223 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:17:50,223 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:17:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-09 19:17:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:17:50,236 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:50,237 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:50,238 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:50,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2013139840, now seen corresponding path program 1 times [2018-12-09 19:17:50,244 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:50,244 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:50,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:50,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:50,346 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:50,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:17:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:50,360 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2018-12-09 19:17:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:50,459 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2018-12-09 19:17:50,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:50,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 19:17:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:50,467 INFO L225 Difference]: With dead ends: 63 [2018-12-09 19:17:50,467 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 19:17:50,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 19:17:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2018-12-09 19:17:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 19:17:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-12-09 19:17:50,495 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2018-12-09 19:17:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:50,495 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-12-09 19:17:50,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-12-09 19:17:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:17:50,496 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:50,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:50,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:50,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash -539017121, now seen corresponding path program 1 times [2018-12-09 19:17:50,497 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:50,497 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:50,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:50,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:50,536 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:50,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:50,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:17:50,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 19:17:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 19:17:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:17:50,538 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 3 states. [2018-12-09 19:17:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:50,602 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-12-09 19:17:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 19:17:50,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-12-09 19:17:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:50,603 INFO L225 Difference]: With dead ends: 60 [2018-12-09 19:17:50,603 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 19:17:50,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:17:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 19:17:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2018-12-09 19:17:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 19:17:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2018-12-09 19:17:50,608 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 17 [2018-12-09 19:17:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:50,608 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2018-12-09 19:17:50,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 19:17:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2018-12-09 19:17:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 19:17:50,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:50,609 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:17:50,609 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:50,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2017437412, now seen corresponding path program 1 times [2018-12-09 19:17:50,609 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:50,609 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:50,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:50,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:50,668 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:50,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:50,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:17:50,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:17:50,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:17:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:50,670 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2018-12-09 19:17:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:50,727 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2018-12-09 19:17:50,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:17:50,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-09 19:17:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:50,729 INFO L225 Difference]: With dead ends: 76 [2018-12-09 19:17:50,729 INFO L226 Difference]: Without dead ends: 76 [2018-12-09 19:17:50,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-09 19:17:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2018-12-09 19:17:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 19:17:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2018-12-09 19:17:50,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 18 [2018-12-09 19:17:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:50,734 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2018-12-09 19:17:50,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:17:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2018-12-09 19:17:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:50,735 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:50,735 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] [2018-12-09 19:17:50,735 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:50,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427199, now seen corresponding path program 1 times [2018-12-09 19:17:50,735 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:50,736 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:50,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:50,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:50,815 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 [2018-12-09 19:17:50,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:50,818 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:50,819 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 19:17:52,850 WARN L854 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#t~malloc12.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |ldv_malloc_#t~malloc12.base|) (_ bv0 1)) (= (store |c_old(#valid)| |ldv_malloc_#t~malloc12.base| (_ bv1 1)) |c_#valid|))) is different from true [2018-12-09 19:17:52,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:52,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:52,861 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 [2018-12-09 19:17:52,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:52,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-09 19:17:52,869 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-09 19:17:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-09 19:17:52,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:52,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:52,930 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:17:52,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:52,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:52,961 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 [2018-12-09 19:17:52,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:52,963 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:52,963 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-09 19:17:52,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:52,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:52,977 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 [2018-12-09 19:17:52,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:52,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-09 19:17:52,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2018-12-09 19:17:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-09 19:17:52,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:53,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:17:53,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-09 19:17:53,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:17:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:17:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-12-09 19:17:53,044 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 8 states. [2018-12-09 19:17:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:55,385 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2018-12-09 19:17:55,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 19:17:55,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-09 19:17:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:55,387 INFO L225 Difference]: With dead ends: 95 [2018-12-09 19:17:55,387 INFO L226 Difference]: Without dead ends: 95 [2018-12-09 19:17:55,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=26, Invalid=67, Unknown=1, NotChecked=16, Total=110 [2018-12-09 19:17:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-09 19:17:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2018-12-09 19:17:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 19:17:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2018-12-09 19:17:55,392 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 23 [2018-12-09 19:17:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:55,392 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2018-12-09 19:17:55,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:17:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2018-12-09 19:17:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:55,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:55,393 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] [2018-12-09 19:17:55,393 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:55,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1629427198, now seen corresponding path program 1 times [2018-12-09 19:17:55,393 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:55,394 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:55,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:55,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:55,478 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 [2018-12-09 19:17:55,479 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:55,489 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 [2018-12-09 19:17:55,490 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:55,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:55,496 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-09 19:17:56,408 WARN L854 $PredicateComparison]: unable to prove that (exists ((ldv_malloc_~size (_ BitVec 32)) (|ldv_malloc_#t~malloc12.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |ldv_malloc_#t~malloc12.base| ldv_malloc_~size)) (= (select |c_old(#valid)| |ldv_malloc_#t~malloc12.base|) (_ bv0 1)))) is different from true [2018-12-09 19:17:56,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:56,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:56,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 4 [2018-12-09 19:17:56,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,446 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 14 treesize of output 17 [2018-12-09 19:17:56,446 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,457 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:14 [2018-12-09 19:17:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-09 19:17:56,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:56,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:17:56,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:17:56,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:56,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:56,759 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 [2018-12-09 19:17:56,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,777 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 [2018-12-09 19:17:56,778 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,783 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2018-12-09 19:17:56,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:56,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 19:17:56,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 4 [2018-12-09 19:17:56,794 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,808 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 14 treesize of output 17 [2018-12-09 19:17:56,808 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,818 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:17:56,818 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:14 [2018-12-09 19:17:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-12-09 19:17:56,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:17:56,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:17:56,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-09 19:17:56,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 19:17:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 19:17:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=88, Unknown=1, NotChecked=18, Total=132 [2018-12-09 19:17:56,991 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 10 states. [2018-12-09 19:17:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:57,533 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2018-12-09 19:17:57,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:17:57,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-09 19:17:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:57,534 INFO L225 Difference]: With dead ends: 100 [2018-12-09 19:17:57,534 INFO L226 Difference]: Without dead ends: 100 [2018-12-09 19:17:57,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2018-12-09 19:17:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-09 19:17:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2018-12-09 19:17:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 19:17:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2018-12-09 19:17:57,538 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 23 [2018-12-09 19:17:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:57,538 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2018-12-09 19:17:57,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 19:17:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2018-12-09 19:17:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 19:17:57,538 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:57,539 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] [2018-12-09 19:17:57,539 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:57,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2134985824, now seen corresponding path program 1 times [2018-12-09 19:17:57,539 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:57,539 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:57,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:57,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:17:57,600 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:57,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:57,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:17:57,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:57,602 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 5 states. [2018-12-09 19:17:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:57,632 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2018-12-09 19:17:57,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:17:57,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-09 19:17:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:57,633 INFO L225 Difference]: With dead ends: 46 [2018-12-09 19:17:57,633 INFO L226 Difference]: Without dead ends: 44 [2018-12-09 19:17:57,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-09 19:17:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-09 19:17:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 19:17:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2018-12-09 19:17:57,635 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2018-12-09 19:17:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:57,635 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2018-12-09 19:17:57,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2018-12-09 19:17:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:17:57,636 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:57,636 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] [2018-12-09 19:17:57,636 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:57,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1783473613, now seen corresponding path program 1 times [2018-12-09 19:17:57,636 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:57,636 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:57,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:57,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 19:17:57,685 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:57,686 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:57,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:17:57,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:17:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:17:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:57,687 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2018-12-09 19:17:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:57,725 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2018-12-09 19:17:57,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 19:17:57,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-09 19:17:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:57,726 INFO L225 Difference]: With dead ends: 70 [2018-12-09 19:17:57,726 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 19:17:57,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:17:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 19:17:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-12-09 19:17:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 19:17:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-12-09 19:17:57,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2018-12-09 19:17:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:57,729 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-12-09 19:17:57,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:17:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-12-09 19:17:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:17:57,730 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:57,730 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] [2018-12-09 19:17:57,730 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:57,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash -768683348, now seen corresponding path program 1 times [2018-12-09 19:17:57,730 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:57,730 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 19:17:57,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:17:57,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:17:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 19:17:57,786 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:17:57,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:17:57,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:17:57,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:17:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:17:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:17:57,788 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 4 states. [2018-12-09 19:17:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:17:57,840 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2018-12-09 19:17:57,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:17:57,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-12-09 19:17:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:17:57,841 INFO L225 Difference]: With dead ends: 53 [2018-12-09 19:17:57,841 INFO L226 Difference]: Without dead ends: 53 [2018-12-09 19:17:57,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:17:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-09 19:17:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-12-09 19:17:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 19:17:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2018-12-09 19:17:57,844 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2018-12-09 19:17:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:17:57,844 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2018-12-09 19:17:57,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:17:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2018-12-09 19:17:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 19:17:57,845 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:17:57,845 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, 1] [2018-12-09 19:17:57,845 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr0REQUIRES_VIOLATION, entry_pointErr3REQUIRES_VIOLATION, entry_pointErr2REQUIRES_VIOLATION, entry_pointErr5ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1REQUIRES_VIOLATION, entry_pointErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 19:17:57,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:17:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 29629726, now seen corresponding path program 1 times [2018-12-09 19:17:57,845 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 19:17:57,845 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9bd14e5a-33b5-4389-aa2c-43af15a4e392/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 [2018-12-09 19:17:57,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:17:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:17:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:17:57,968 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:17:57,975 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-09 19:17:57,980 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 19:17:57,981 WARN L1298 BoogieBacktranslator]: Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# [2018-12-09 19:17:57,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:17:57 BoogieIcfgContainer [2018-12-09 19:17:57,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:17:57,987 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:17:57,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:17:57,987 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:17:57,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:50" (3/4) ... [2018-12-09 19:17:57,989 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 19:17:57,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:17:57,990 INFO L168 Benchmark]: Toolchain (without parser) took 8387.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.4 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -174.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:57,991 INFO L168 Benchmark]: CDTParser took 0.14 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. [2018-12-09 19:17:57,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:57,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.43 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. [2018-12-09 19:17:57,991 INFO L168 Benchmark]: Boogie Preprocessor took 17.84 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. [2018-12-09 19:17:57,992 INFO L168 Benchmark]: RCFGBuilder took 200.67 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:57,992 INFO L168 Benchmark]: TraceAbstraction took 7801.00 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -35.0 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. [2018-12-09 19:17:57,993 INFO L168 Benchmark]: Witness Printer took 2.63 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. [2018-12-09 19:17:57,995 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 341.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.43 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 17.84 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 200.67 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7801.00 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -35.0 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. * Witness Printer took 2.63 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. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: BitvecLiteral 0bv32 could not be translated for associated CType STRUCT~~ldv_list_head?next~*ldv_list_head?prev~*ldv_list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1458]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1458. Possible FailurePath: [L1135] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [\old(ldv_global_msg_list)=null, \old(ldv_global_msg_list)=null, ldv_global_msg_list={-2146401247:0}] [L1459] CALL entry_point() VAL [ldv_global_msg_list={-2146401247:0}] [L1439] int len = 10; VAL [ldv_global_msg_list={-2146401247:0}, len=10] [L1440] CALL, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [\old(size)=40, ldv_global_msg_list={-2146401247:0}] [L1073] COND TRUE __VERIFIER_nondet_int() [L1074] return malloc(size); VAL [\old(size)=40, \result={1082401:0}, ldv_global_msg_list={-2146401247:0}, malloc(size)={1082401:0}, size=40] [L1440] RET, EXPR ldv_malloc(sizeof(struct A18*)*len) VAL [ldv_global_msg_list={-2146401247:0}, ldv_malloc(sizeof(struct A18*)*len)={1082401:0}, len=10] [L1440] struct A18 **array = (struct A18 **)ldv_malloc(sizeof(struct A18*)*len); [L1441] struct A18 *p; [L1442] int i=0; [L1443] int j; VAL [array={1082401:0}, i=0, ldv_global_msg_list={-2146401247:0}, len=10] [L1444] COND FALSE !(!array) VAL [array={1082401:0}, i=0, ldv_global_msg_list={-2146401247:0}, len=10] [L1445] COND TRUE i=0) VAL [array={1082401:0}, i=0, j=4294967295, ldv_global_msg_list={-2146401247:0}, len=10, p={0:0}] [L1459] RET entry_point() VAL [ldv_global_msg_list={-2146401247:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 7 error locations. UNSAFE Result, 7.7s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 348 SDtfs, 285 SDslu, 763 SDs, 0 SdLazy, 540 SolverSat, 49 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=5, 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, 8 MinimizatonAttempts, 147 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 207 ConstructedInterpolants, 14 QuantifiedInterpolants, 19573 SizeOfPredicates, 24 NumberOfNonLiveVariables, 877 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 18/28 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...