./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c -s /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2749915c63b6e758ac6033a38fbdad80769d2869 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:44:47,007 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:44:47,009 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:44:47,016 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:44:47,016 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:44:47,017 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:44:47,017 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:44:47,018 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:44:47,020 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:44:47,020 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:44:47,021 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:44:47,021 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:44:47,022 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:44:47,023 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:44:47,023 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:44:47,024 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:44:47,025 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:44:47,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:44:47,027 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:44:47,029 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:44:47,029 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:44:47,030 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:44:47,032 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:44:47,032 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:44:47,032 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:44:47,033 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:44:47,034 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:44:47,035 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:44:47,035 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:44:47,036 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:44:47,036 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:44:47,037 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:44:47,037 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:44:47,037 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:44:47,038 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:44:47,038 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:44:47,038 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-10 07:44:47,048 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:44:47,049 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:44:47,049 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:44:47,050 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:44:47,050 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:44:47,051 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:44:47,051 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:44:47,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:44:47,052 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 07:44:47,053 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:44:47,053 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer 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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2749915c63b6e758ac6033a38fbdad80769d2869 [2018-11-10 07:44:47,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:44:47,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:44:47,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:44:47,085 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:44:47,086 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:44:47,086 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-11-10 07:44:47,124 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/data/74c3d18e8/209b20a2aafd44c3a9f1eb83c71c0bce/FLAG8e27c0860 [2018-11-10 07:44:47,461 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:44:47,461 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-11-10 07:44:47,465 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/data/74c3d18e8/209b20a2aafd44c3a9f1eb83c71c0bce/FLAG8e27c0860 [2018-11-10 07:44:47,474 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/data/74c3d18e8/209b20a2aafd44c3a9f1eb83c71c0bce [2018-11-10 07:44:47,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:44:47,477 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:44:47,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:44:47,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:44:47,481 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:44:47,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656f031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47, skipping insertion in model container [2018-11-10 07:44:47,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:44:47,506 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:44:47,623 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:44:47,628 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:44:47,637 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:44:47,646 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:44:47,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47 WrapperNode [2018-11-10 07:44:47,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:44:47,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:44:47,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:44:47,647 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:44:47,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... [2018-11-10 07:44:47,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:44:47,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:44:47,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:44:47,670 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:44:47,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/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 [2018-11-10 07:44:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:44:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:44:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 07:44:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 07:44:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 07:44:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 07:44:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:44:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:44:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-10 07:44:47,876 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:44:47,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:44:47 BoogieIcfgContainer [2018-11-10 07:44:47,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:44:47,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:44:47,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:44:47,879 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:44:47,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:44:47" (1/3) ... [2018-11-10 07:44:47,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1000dc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:44:47, skipping insertion in model container [2018-11-10 07:44:47,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:44:47" (2/3) ... [2018-11-10 07:44:47,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1000dc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:44:47, skipping insertion in model container [2018-11-10 07:44:47,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:44:47" (3/3) ... [2018-11-10 07:44:47,881 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca_false-valid-free.c [2018-11-10 07:44:47,886 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:44:47,891 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-11-10 07:44:47,899 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-11-10 07:44:47,920 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:44:47,920 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:44:47,920 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-10 07:44:47,920 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:44:47,921 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:44:47,921 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:44:47,921 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:44:47,921 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:44:47,921 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:44:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-11-10 07:44:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-10 07:44:47,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:47,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:47,944 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:47,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash -196645647, now seen corresponding path program 1 times [2018-11-10 07:44:47,951 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:47,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:47,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:47,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:47,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:44:48,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:44:48,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:44:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:44:48,047 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2018-11-10 07:44:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,058 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 07:44:48,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:44:48,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-10 07:44:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,067 INFO L225 Difference]: With dead ends: 31 [2018-11-10 07:44:48,067 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 07:44:48,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:44:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 07:44:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 07:44:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 07:44:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-10 07:44:48,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 9 [2018-11-10 07:44:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,091 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-10 07:44:48,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:44:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-10 07:44:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 07:44:48,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,092 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1801060631, now seen corresponding path program 1 times [2018-11-10 07:44:48,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,130 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:44:48,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:44:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:44:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:44:48,132 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 3 states. [2018-11-10 07:44:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,159 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-11-10 07:44:48,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:44:48,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-10 07:44:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,160 INFO L225 Difference]: With dead ends: 35 [2018-11-10 07:44:48,160 INFO L226 Difference]: Without dead ends: 35 [2018-11-10 07:44:48,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:44:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-10 07:44:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-11-10 07:44:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 07:44:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 07:44:48,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 10 [2018-11-10 07:44:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,164 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 07:44:48,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:44:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 07:44:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 07:44:48,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,165 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,165 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1801060578, now seen corresponding path program 1 times [2018-11-10 07:44:48,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:44:48,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 07:44:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 07:44:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 07:44:48,208 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 4 states. [2018-11-10 07:44:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,248 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-11-10 07:44:48,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 07:44:48,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-10 07:44:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,249 INFO L225 Difference]: With dead ends: 29 [2018-11-10 07:44:48,249 INFO L226 Difference]: Without dead ends: 29 [2018-11-10 07:44:48,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:44:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-10 07:44:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-10 07:44:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 07:44:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 07:44:48,251 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2018-11-10 07:44:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,252 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 07:44:48,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 07:44:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 07:44:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 07:44:48,252 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,252 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,252 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1801060577, now seen corresponding path program 1 times [2018-11-10 07:44:48,253 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:44:48,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 07:44:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 07:44:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 07:44:48,329 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2018-11-10 07:44:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,382 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-10 07:44:48,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 07:44:48,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-10 07:44:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,383 INFO L225 Difference]: With dead ends: 30 [2018-11-10 07:44:48,383 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 07:44:48,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:44:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 07:44:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-10 07:44:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 07:44:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-10 07:44:48,386 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 10 [2018-11-10 07:44:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,387 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-10 07:44:48,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 07:44:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-10 07:44:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 07:44:48,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,387 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,388 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash -523019111, now seen corresponding path program 1 times [2018-11-10 07:44:48,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:44:48,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:44:48,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 07:44:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 07:44:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 07:44:48,446 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2018-11-10 07:44:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,469 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-11-10 07:44:48,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 07:44:48,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-10 07:44:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,470 INFO L225 Difference]: With dead ends: 26 [2018-11-10 07:44:48,470 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 07:44:48,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:44:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 07:44:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-10 07:44:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-10 07:44:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-10 07:44:48,473 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 15 [2018-11-10 07:44:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,474 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-10 07:44:48,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 07:44:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-10 07:44:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 07:44:48,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,474 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,475 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash -523019058, now seen corresponding path program 1 times [2018-11-10 07:44:48,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:44:48,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 07:44:48,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:44:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:44:48,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:44:48,606 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2018-11-10 07:44:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,672 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-10 07:44:48,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:44:48,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-10 07:44:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,673 INFO L225 Difference]: With dead ends: 27 [2018-11-10 07:44:48,673 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 07:44:48,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-11-10 07:44:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 07:44:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-11-10 07:44:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 07:44:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 07:44:48,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2018-11-10 07:44:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,676 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 07:44:48,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:44:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 07:44:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 07:44:48,677 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,677 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,677 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1397906127, now seen corresponding path program 1 times [2018-11-10 07:44:48,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:44:48,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/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 [2018-11-10 07:44:48,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:44:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:44:48,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-10 07:44:48,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 07:44:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 07:44:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:44:48,770 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-11-10 07:44:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:48,780 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-11-10 07:44:48,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 07:44:48,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-10 07:44:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:48,781 INFO L225 Difference]: With dead ends: 32 [2018-11-10 07:44:48,781 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 07:44:48,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:44:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 07:44:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-10 07:44:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-10 07:44:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-11-10 07:44:48,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2018-11-10 07:44:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:48,784 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-11-10 07:44:48,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 07:44:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-11-10 07:44:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 07:44:48,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:48,784 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:48,785 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:48,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:48,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1105261600, now seen corresponding path program 2 times [2018-11-10 07:44:48,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:48,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:48,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:48,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:48,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:44:48,815 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/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 [2018-11-10 07:44:48,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:44:48,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 07:44:48,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:44:48,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:44:48,895 WARN L854 $PredicateComparison]: unable to prove that (exists ((|main_#t~malloc1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |main_#t~malloc1.base| 0)) (= (select |c_old(#valid)| |main_#t~malloc1.base|) 0))) is different from true [2018-11-10 07:44:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:44:48,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 07:44:48,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2018-11-10 07:44:48,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 07:44:48,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 07:44:48,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=29, Unknown=1, NotChecked=10, Total=56 [2018-11-10 07:44:48,920 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 8 states. [2018-11-10 07:44:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:49,005 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-11-10 07:44:49,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 07:44:49,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-11-10 07:44:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:49,005 INFO L225 Difference]: With dead ends: 41 [2018-11-10 07:44:49,006 INFO L226 Difference]: Without dead ends: 37 [2018-11-10 07:44:49,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=75, Unknown=2, NotChecked=18, Total=132 [2018-11-10 07:44:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-10 07:44:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-10 07:44:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-10 07:44:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-10 07:44:49,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 25 [2018-11-10 07:44:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:49,009 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-10 07:44:49,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 07:44:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-10 07:44:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-10 07:44:49,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:49,010 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:49,010 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:49,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash 83580925, now seen corresponding path program 1 times [2018-11-10 07:44:49,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:49,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:49,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:44:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:49,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:44:49,051 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/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 [2018-11-10 07:44:49,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:49,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:44:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:49,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:44:49,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-10 07:44:49,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:44:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:44:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:44:49,132 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 7 states. [2018-11-10 07:44:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:49,171 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-10 07:44:49,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:44:49,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-11-10 07:44:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:49,176 INFO L225 Difference]: With dead ends: 42 [2018-11-10 07:44:49,176 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 07:44:49,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:44:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 07:44:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-11-10 07:44:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 07:44:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-10 07:44:49,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 33 [2018-11-10 07:44:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:49,180 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-10 07:44:49,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:44:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-10 07:44:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-10 07:44:49,181 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:44:49,181 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:44:49,181 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2018-11-10 07:44:49,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:44:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 740689262, now seen corresponding path program 2 times [2018-11-10 07:44:49,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:44:49,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:44:49,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:49,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:44:49,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:44:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:44:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:44:49,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:44:49,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:44:49,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:44:49,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 07:44:49,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:44:49,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:44:49,311 WARN L854 $PredicateComparison]: unable to prove that (exists ((|main_#t~malloc1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |main_#t~malloc1.base| 0)) (= (select |c_old(#valid)| |main_#t~malloc1.base|) 0))) is different from true [2018-11-10 07:44:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-10 07:44:49,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 07:44:49,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2018-11-10 07:44:49,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 07:44:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 07:44:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=1, NotChecked=18, Total=132 [2018-11-10 07:44:49,333 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 12 states. [2018-11-10 07:44:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:44:49,491 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-10 07:44:49,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 07:44:49,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2018-11-10 07:44:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:44:49,492 INFO L225 Difference]: With dead ends: 46 [2018-11-10 07:44:49,492 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 07:44:49,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=192, Unknown=2, NotChecked=30, Total=306 [2018-11-10 07:44:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 07:44:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 07:44:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 07:44:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 07:44:49,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-11-10 07:44:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:44:49,493 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 07:44:49,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 07:44:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 07:44:49,493 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 07:44:49,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:44:49 BoogieIcfgContainer [2018-11-10 07:44:49,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:44:49,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:44:49,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:44:49,497 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:44:49,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:44:47" (3/4) ... [2018-11-10 07:44:49,500 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 07:44:49,505 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 07:44:49,506 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 07:44:49,508 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-10 07:44:49,509 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-10 07:44:49,509 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 07:44:49,536 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_95b453de-b91e-4478-b1c6-f34e7dcfe08d/bin-2019/uautomizer/witness.graphml [2018-11-10 07:44:49,536 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:44:49,536 INFO L168 Benchmark]: Toolchain (without parser) took 2060.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 960.2 MB in the beginning and 922.5 MB in the end (delta: 37.7 MB). Peak memory consumption was 202.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,537 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:44:49,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.73 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,538 INFO L168 Benchmark]: Boogie Preprocessor took 22.90 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,538 INFO L168 Benchmark]: RCFGBuilder took 206.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -198.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,538 INFO L168 Benchmark]: TraceAbstraction took 1620.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 925.9 MB in the end (delta: 219.5 MB). Peak memory consumption was 219.5 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,539 INFO L168 Benchmark]: Witness Printer took 38.52 ms. Allocated memory is still 1.2 GB. Free memory was 925.9 MB in the beginning and 922.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:44:49,540 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.73 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.90 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -198.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1620.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 925.9 MB in the end (delta: 219.5 MB). Peak memory consumption was 219.5 MB. Max. memory is 11.5 GB. * Witness Printer took 38.52 ms. Allocated memory is still 1.2 GB. Free memory was 925.9 MB in the beginning and 922.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 12]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 12]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 7 error locations. SAFE Result, 1.5s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 187 SDtfs, 198 SDslu, 307 SDs, 0 SdLazy, 260 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=9, 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, 10 MinimizatonAttempts, 21 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 301 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 287 ConstructedInterpolants, 4 QuantifiedInterpolants, 36509 SizeOfPredicates, 6 NumberOfNonLiveVariables, 274 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 52/145 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...