./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 0.1.23-5842f4b [2018-11-18 13:31:32,696 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:31:32,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:31:32,704 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:31:32,704 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:31:32,705 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:31:32,706 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:31:32,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:31:32,708 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:31:32,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:31:32,710 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:31:32,710 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:31:32,711 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:31:32,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:31:32,712 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:31:32,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:31:32,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:31:32,715 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:31:32,716 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:31:32,718 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:31:32,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:31:32,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:31:32,721 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:31:32,721 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:31:32,721 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:31:32,722 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:31:32,723 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:31:32,724 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:31:32,724 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:31:32,725 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:31:32,725 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:31:32,726 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:31:32,726 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:31:32,726 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:31:32,727 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:31:32,727 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:31:32,728 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-18 13:31:32,736 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:31:32,736 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:31:32,737 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:31:32,737 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:31:32,737 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:31:32,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:31:32,737 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 13:31:32,738 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:31:32,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:31:32,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:31:32,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:31:32,740 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:31:32,740 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:31:32,740 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:31:32,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:31:32,740 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_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:32,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:31:32,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:31:32,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:31:32,774 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:31:32,774 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:31:32,774 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-11-18 13:31:32,819 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/data/62e46554c/a95940624c74435c8280a8df1312a86f/FLAG973f584f4 [2018-11-18 13:31:33,215 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:31:33,216 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/sv-benchmarks/c/memsafety-ext3/freeAlloca_false-valid-free.c [2018-11-18 13:31:33,219 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/data/62e46554c/a95940624c74435c8280a8df1312a86f/FLAG973f584f4 [2018-11-18 13:31:33,231 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/data/62e46554c/a95940624c74435c8280a8df1312a86f [2018-11-18 13:31:33,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:31:33,234 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:31:33,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:31:33,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:31:33,236 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:31:33,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa861a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33, skipping insertion in model container [2018-11-18 13:31:33,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:31:33,257 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:31:33,355 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:31:33,360 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:31:33,370 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:31:33,380 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:31:33,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33 WrapperNode [2018-11-18 13:31:33,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:31:33,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:31:33,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:31:33,381 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:31:33,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... [2018-11-18 13:31:33,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:31:33,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:31:33,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:31:33,407 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:31:33,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:33,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:31:33,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:31:33,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:31:33,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:31:33,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:31:33,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:31:33,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:31:33,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 13:31:33,651 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:31:33,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:31:33 BoogieIcfgContainer [2018-11-18 13:31:33,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:31:33,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:31:33,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:31:33,655 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:31:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:31:33" (1/3) ... [2018-11-18 13:31:33,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc504ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:31:33, skipping insertion in model container [2018-11-18 13:31:33,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:33" (2/3) ... [2018-11-18 13:31:33,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc504ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:31:33, skipping insertion in model container [2018-11-18 13:31:33,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:31:33" (3/3) ... [2018-11-18 13:31:33,658 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca_false-valid-free.c [2018-11-18 13:31:33,667 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:31:33,678 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-11-18 13:31:33,693 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-11-18 13:31:33,715 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:31:33,715 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:31:33,716 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 13:31:33,716 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:31:33,716 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:31:33,716 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:31:33,716 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:31:33,716 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:31:33,716 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:31:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 13:31:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-18 13:31:33,737 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:33,737 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:33,739 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:33,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -746767553, now seen corresponding path program 1 times [2018-11-18 13:31:33,745 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:33,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:33,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:33,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:33,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:33,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:31:33,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:31:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:31:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:31:33,852 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-11-18 13:31:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:33,864 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-18 13:31:33,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:31:33,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-18 13:31:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:33,871 INFO L225 Difference]: With dead ends: 27 [2018-11-18 13:31:33,871 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 13:31:33,872 INFO L604 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 [2018-11-18 13:31:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 13:31:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 13:31:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:31:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 13:31:33,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2018-11-18 13:31:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:33,896 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 13:31:33,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:31:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 13:31:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 13:31:33,897 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:33,897 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:33,897 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:33,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970534, now seen corresponding path program 1 times [2018-11-18 13:31:33,898 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:33,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:33,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:33,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:33,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:33,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:31:33,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:31:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:31:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:33,940 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-11-18 13:31:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:33,976 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 13:31:33,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:31:33,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 13:31:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:33,977 INFO L225 Difference]: With dead ends: 31 [2018-11-18 13:31:33,977 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 13:31:33,978 INFO L604 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 [2018-11-18 13:31:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 13:31:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-18 13:31:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 13:31:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-18 13:31:33,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 9 [2018-11-18 13:31:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:33,981 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-18 13:31:33,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:31:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-18 13:31:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 13:31:33,981 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:33,981 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:33,982 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:33,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970481, now seen corresponding path program 1 times [2018-11-18 13:31:33,982 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:33,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:33,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:33,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:34,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:31:34,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:31:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:31:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,019 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 3 states. [2018-11-18 13:31:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,047 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-11-18 13:31:34,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:31:34,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 13:31:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,048 INFO L225 Difference]: With dead ends: 24 [2018-11-18 13:31:34,048 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 13:31:34,048 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 13:31:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-18 13:31:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 13:31:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-18 13:31:34,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2018-11-18 13:31:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,050 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-18 13:31:34,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:31:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-18 13:31:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 13:31:34,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,051 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,052 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970480, now seen corresponding path program 1 times [2018-11-18 13:31:34,052 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:34,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:31:34,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:31:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:31:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,093 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2018-11-18 13:31:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,126 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-11-18 13:31:34,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:31:34,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 13:31:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,127 INFO L225 Difference]: With dead ends: 26 [2018-11-18 13:31:34,127 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 13:31:34,127 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 13:31:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-18 13:31:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:31:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 13:31:34,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2018-11-18 13:31:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 13:31:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:31:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 13:31:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:31:34,130 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,130 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,131 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash 609832967, now seen corresponding path program 1 times [2018-11-18 13:31:34,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:31:34,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:34,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:31:34,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:31:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:31:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,171 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-11-18 13:31:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,180 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-11-18 13:31:34,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:31:34,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-18 13:31:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,181 INFO L225 Difference]: With dead ends: 22 [2018-11-18 13:31:34,181 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 13:31:34,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:31:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 13:31:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 13:31:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 13:31:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-18 13:31:34,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2018-11-18 13:31:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,183 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-18 13:31:34,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:31:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-18 13:31:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:31:34,183 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,184 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,185 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash 609833020, now seen corresponding path program 1 times [2018-11-18 13:31:34,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:34,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:31:34,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:31:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:31:34,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:34,262 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2018-11-18 13:31:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,285 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-18 13:31:34,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:31:34,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 13:31:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,286 INFO L225 Difference]: With dead ends: 23 [2018-11-18 13:31:34,286 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 13:31:34,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 13:31:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-11-18 13:31:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 13:31:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-18 13:31:34,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2018-11-18 13:31:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,289 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-18 13:31:34,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:31:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-18 13:31:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 13:31:34,289 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,290 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,290 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -177766944, now seen corresponding path program 1 times [2018-11-18 13:31:34,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:34,323 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:34,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:34,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 13:31:34,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:31:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:31:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:31:34,382 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-11-18 13:31:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,401 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 13:31:34,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:31:34,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 13:31:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,402 INFO L225 Difference]: With dead ends: 28 [2018-11-18 13:31:34,402 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 13:31:34,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:31:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 13:31:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-11-18 13:31:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 13:31:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-18 13:31:34,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2018-11-18 13:31:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,404 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-18 13:31:34,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:31:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-18 13:31:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 13:31:34,404 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,405 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,405 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash 896296844, now seen corresponding path program 2 times [2018-11-18 13:31:34,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:34,439 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:34,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:31:34,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-18 13:31:34,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:34,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 13:31:34,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:31:34,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2018-11-18 13:31:34,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:31:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:31:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2018-11-18 13:31:34,852 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-11-18 13:31:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:34,907 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-18 13:31:34,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:31:34,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-18 13:31:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:34,908 INFO L225 Difference]: With dead ends: 35 [2018-11-18 13:31:34,908 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 13:31:34,908 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=74, Unknown=1, NotChecked=0, Total=110 [2018-11-18 13:31:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 13:31:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-11-18 13:31:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:31:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-18 13:31:34,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 22 [2018-11-18 13:31:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:34,911 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-18 13:31:34,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:31:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-18 13:31:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 13:31:34,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:34,912 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:34,912 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:34,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1137280964, now seen corresponding path program 1 times [2018-11-18 13:31:34,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:34,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:34,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:34,946 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:34,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:34,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:35,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:35,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-18 13:31:35,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:31:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:31:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:31:35,009 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 7 states. [2018-11-18 13:31:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:35,065 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-18 13:31:35,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:31:35,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-11-18 13:31:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:35,066 INFO L225 Difference]: With dead ends: 38 [2018-11-18 13:31:35,066 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 13:31:35,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:31:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 13:31:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-11-18 13:31:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 13:31:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-18 13:31:35,069 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 29 [2018-11-18 13:31:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:35,069 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-18 13:31:35,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:31:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-18 13:31:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 13:31:35,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:35,070 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:35,070 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 13:31:35,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1758576664, now seen corresponding path program 2 times [2018-11-18 13:31:35,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:31:35,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:31:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:35,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:31:35,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:35,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/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 [2018-11-18 13:31:35,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:31:35,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-18 13:31:35,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:35,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 13:31:35,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:31:35,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2018-11-18 13:31:35,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 13:31:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 13:31:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=77, Unknown=1, NotChecked=0, Total=110 [2018-11-18 13:31:35,527 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 11 states. [2018-11-18 13:31:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:35,628 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-18 13:31:35,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 13:31:35,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2018-11-18 13:31:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:35,629 INFO L225 Difference]: With dead ends: 42 [2018-11-18 13:31:35,629 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:31:35,629 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=167, Unknown=1, NotChecked=0, Total=240 [2018-11-18 13:31:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:31:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:31:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:31:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:31:35,630 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-11-18 13:31:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:35,630 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:31:35,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 13:31:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:31:35,631 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:31:35,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:31:35 BoogieIcfgContainer [2018-11-18 13:31:35,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:31:35,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:31:35,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:31:35,634 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:31:35,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:31:33" (3/4) ... [2018-11-18 13:31:35,637 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:31:35,641 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:31:35,642 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:31:35,644 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-18 13:31:35,644 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 13:31:35,645 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:31:35,671 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5be0fabd-a105-4320-aff7-8fb0b63e7017/bin-2019/uautomizer/witness.graphml [2018-11-18 13:31:35,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:31:35,672 INFO L168 Benchmark]: Toolchain (without parser) took 2438.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 959.8 MB in the beginning and 938.1 MB in the end (delta: 21.7 MB). Peak memory consumption was 155.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,672 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:31:35,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 947.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,673 INFO L168 Benchmark]: Boogie Preprocessor took 26.37 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,673 INFO L168 Benchmark]: RCFGBuilder took 244.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -171.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,674 INFO L168 Benchmark]: TraceAbstraction took 1981.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 940.8 MB in the end (delta: 176.0 MB). Peak memory consumption was 176.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,674 INFO L168 Benchmark]: Witness Printer took 36.89 ms. Allocated memory is still 1.2 GB. Free memory was 940.8 MB in the beginning and 938.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:35,676 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 947.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.37 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 244.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -171.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1981.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 940.8 MB in the end (delta: 176.0 MB). Peak memory consumption was 176.0 MB. Max. memory is 11.5 GB. * Witness Printer took 36.89 ms. Allocated memory is still 1.2 GB. Free memory was 940.8 MB in the beginning and 938.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 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: 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: 12]: 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, 27 locations, 7 error locations. SAFE Result, 1.9s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 103 SDslu, 224 SDs, 0 SdLazy, 205 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 20 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 267 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 253 ConstructedInterpolants, 2 QuantifiedInterpolants, 29043 SizeOfPredicates, 3 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 23 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...