./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1_false-valid-deref.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_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:36:19,784 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:36:19,785 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:36:19,793 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:36:19,793 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:36:19,793 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:36:19,794 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:36:19,795 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:36:19,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:36:19,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:36:19,797 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:36:19,798 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:36:19,798 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:36:19,799 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:36:19,800 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:36:19,800 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:36:19,801 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:36:19,802 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:36:19,803 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:36:19,804 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:36:19,805 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:36:19,806 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:36:19,807 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:36:19,808 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:36:19,808 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:36:19,808 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:36:19,809 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:36:19,810 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:36:19,810 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:36:19,811 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:36:19,811 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:36:19,812 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:36:19,812 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:36:19,812 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:36:19,812 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:36:19,813 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:36:19,813 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-18 09:36:19,823 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:36:19,823 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:36:19,824 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 09:36:19,824 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 09:36:19,824 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 09:36:19,824 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:36:19,824 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:36:19,824 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:36:19,825 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:36:19,825 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:36:19,826 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 09:36:19,826 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:36:19,826 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_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2018-11-18 09:36:19,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:36:19,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:36:19,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:36:19,862 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:36:19,862 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:36:19,862 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/realloc1_false-valid-deref.c [2018-11-18 09:36:19,906 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/data/ce8bdbc6a/1151fc8551a4428c89e6197e386c52e1/FLAGf0919b68a [2018-11-18 09:36:20,302 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:36:20,303 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/sv-benchmarks/c/memsafety-ext3/realloc1_false-valid-deref.c [2018-11-18 09:36:20,307 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/data/ce8bdbc6a/1151fc8551a4428c89e6197e386c52e1/FLAGf0919b68a [2018-11-18 09:36:20,317 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/data/ce8bdbc6a/1151fc8551a4428c89e6197e386c52e1 [2018-11-18 09:36:20,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:36:20,320 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 09:36:20,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:36:20,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:36:20,322 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:36:20,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622ff55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20, skipping insertion in model container [2018-11-18 09:36:20,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:36:20,342 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:36:20,446 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:36:20,451 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:36:20,460 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:36:20,469 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:36:20,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20 WrapperNode [2018-11-18 09:36:20,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:36:20,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:36:20,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:36:20,470 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:36:20,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... [2018-11-18 09:36:20,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:36:20,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:36:20,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:36:20,495 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:36:20,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 09:36:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:36:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:36:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:36:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-18 09:36:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-18 09:36:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2018-11-18 09:36:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-18 09:36:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:36:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 09:36:20,739 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:36:20,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:36:20 BoogieIcfgContainer [2018-11-18 09:36:20,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:36:20,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:36:20,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:36:20,742 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:36:20,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:36:20" (1/3) ... [2018-11-18 09:36:20,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ee249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:36:20, skipping insertion in model container [2018-11-18 09:36:20,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:36:20" (2/3) ... [2018-11-18 09:36:20,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247ee249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:36:20, skipping insertion in model container [2018-11-18 09:36:20,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:36:20" (3/3) ... [2018-11-18 09:36:20,745 INFO L112 eAbstractionObserver]: Analyzing ICFG realloc1_false-valid-deref.c [2018-11-18 09:36:20,751 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:36:20,757 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-11-18 09:36:20,774 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-11-18 09:36:20,796 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:36:20,797 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:36:20,797 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 09:36:20,797 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:36:20,797 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:36:20,798 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:36:20,798 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:36:20,798 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:36:20,798 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:36:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 09:36:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-18 09:36:20,819 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:20,820 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:20,822 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:20,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -746767554, now seen corresponding path program 1 times [2018-11-18 09:36:20,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:20,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:20,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:20,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:20,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:20,912 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 09:36:20,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:20,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:36:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 09:36:20,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 09:36:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:36:20,928 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-11-18 09:36:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:20,943 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-18 09:36:20,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 09:36:20,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-18 09:36:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:20,949 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:36:20,949 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 09:36:20,950 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 09:36:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 09:36:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 09:36:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 09:36:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 09:36:20,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2018-11-18 09:36:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:20,978 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 09:36:20,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 09:36:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 09:36:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 09:36:20,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:20,978 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:20,978 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:20,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970535, now seen corresponding path program 1 times [2018-11-18 09:36:20,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:20,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:20,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,027 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 09:36:21,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:21,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 09:36:21,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:36:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:36:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:36:21,029 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-11-18 09:36:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,049 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 09:36:21,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:36:21,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 09:36:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,051 INFO L225 Difference]: With dead ends: 31 [2018-11-18 09:36:21,051 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 09:36:21,051 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 09:36:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 09:36:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-18 09:36:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:36:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-18 09:36:21,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 9 [2018-11-18 09:36:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,055 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-18 09:36:21,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:36:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-18 09:36:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 09:36:21,056 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,056 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,056 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970481, now seen corresponding path program 1 times [2018-11-18 09:36:21,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,089 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 09:36:21,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:21,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:36:21,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:36:21,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:36:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:36:21,090 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 3 states. [2018-11-18 09:36:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,118 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 09:36:21,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:36:21,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 09:36:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,119 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:36:21,119 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 09:36:21,119 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 09:36:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 09:36:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-11-18 09:36:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 09:36:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 09:36:21,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2018-11-18 09:36:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,121 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 09:36:21,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:36:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 09:36:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 09:36:21,122 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,122 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,122 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1674970480, now seen corresponding path program 1 times [2018-11-18 09:36:21,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,170 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 09:36:21,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:21,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:36:21,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:36:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:36:21,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:36:21,172 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-11-18 09:36:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,194 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-18 09:36:21,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:36:21,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 09:36:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,195 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:36:21,195 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 09:36:21,195 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 09:36:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 09:36:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2018-11-18 09:36:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 09:36:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-18 09:36:21,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2018-11-18 09:36:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,198 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-18 09:36:21,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:36:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-18 09:36:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:36:21,198 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,198 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,199 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash 609832965, now seen corresponding path program 1 times [2018-11-18 09:36:21,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,218 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 09:36:21,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:21,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:36:21,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:36:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:36:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:36:21,220 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2018-11-18 09:36:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,231 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 09:36:21,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:36:21,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-18 09:36:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,232 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:36:21,232 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 09:36:21,232 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 09:36:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 09:36:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-11-18 09:36:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 09:36:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 09:36:21,234 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2018-11-18 09:36:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,234 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 09:36:21,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:36:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 09:36:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:36:21,235 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,235 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,235 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash 609833020, now seen corresponding path program 1 times [2018-11-18 09:36:21,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,314 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 09:36:21,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:36:21,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:36:21,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:36:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:36:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:36:21,315 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2018-11-18 09:36:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,340 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 09:36:21,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:36:21,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 09:36:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,341 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:36:21,341 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 09:36:21,341 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 09:36:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 09:36:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-11-18 09:36:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 09:36:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 09:36:21,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2018-11-18 09:36:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,343 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 09:36:21,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:36:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 09:36:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 09:36:21,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,344 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,344 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1933928936, now seen corresponding path program 1 times [2018-11-18 09:36:21,344 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,382 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 09:36:21,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:21,382 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 09:36:21,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:21,429 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 09:36:21,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:21,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 09:36:21,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:36:21,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:36:21,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:36:21,446 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-11-18 09:36:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,464 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-11-18 09:36:21,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 09:36:21,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-11-18 09:36:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,465 INFO L225 Difference]: With dead ends: 29 [2018-11-18 09:36:21,465 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 09:36:21,466 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 09:36:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 09:36:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-11-18 09:36:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:36:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-18 09:36:21,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2018-11-18 09:36:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,468 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-18 09:36:21,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:36:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-18 09:36:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 09:36:21,468 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,469 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,469 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1218012484, now seen corresponding path program 2 times [2018-11-18 09:36:21,469 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:21,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,525 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 09:36:21,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:21,525 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 09:36:21,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:36:21,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:36:21,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:21,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:21,549 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 09:36:21,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:21,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-18 09:36:21,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:36:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:36:21,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:36:21,567 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 6 states. [2018-11-18 09:36:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,581 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 09:36:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:36:21,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-11-18 09:36:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,582 INFO L225 Difference]: With dead ends: 34 [2018-11-18 09:36:21,582 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 09:36:21,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:36:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 09:36:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-11-18 09:36:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 09:36:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-18 09:36:21,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 21 [2018-11-18 09:36:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,585 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-18 09:36:21,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:36:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-18 09:36:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 09:36:21,586 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,586 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,586 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash 843501160, now seen corresponding path program 3 times [2018-11-18 09:36:21,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:21,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,628 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 09:36:21,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:21,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 09:36:21,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:36:21,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 09:36:21,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:21,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:21,667 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 09:36:21,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:21,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-18 09:36:21,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 09:36:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 09:36:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:36:21,687 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2018-11-18 09:36:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,708 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-11-18 09:36:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:36:21,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-18 09:36:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,709 INFO L225 Difference]: With dead ends: 39 [2018-11-18 09:36:21,709 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 09:36:21,710 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 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 09:36:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 09:36:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-11-18 09:36:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 09:36:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 09:36:21,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2018-11-18 09:36:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,713 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 09:36:21,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 09:36:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 09:36:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 09:36:21,714 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,714 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,714 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1341127108, now seen corresponding path program 4 times [2018-11-18 09:36:21,715 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:21,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,785 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 09:36:21,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:21,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/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 09:36:21,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:36:21,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:36:21,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:21,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:21,836 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 09:36:21,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:21,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 09:36:21,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 09:36:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 09:36:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:36:21,854 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2018-11-18 09:36:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:21,887 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-11-18 09:36:21,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 09:36:21,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 09:36:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:21,888 INFO L225 Difference]: With dead ends: 44 [2018-11-18 09:36:21,889 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 09:36:21,889 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:36:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 09:36:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2018-11-18 09:36:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-18 09:36:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-11-18 09:36:21,892 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 31 [2018-11-18 09:36:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:21,892 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-11-18 09:36:21,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 09:36:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-11-18 09:36:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 09:36:21,893 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:21,893 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:21,894 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:21,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1405840664, now seen corresponding path program 5 times [2018-11-18 09:36:21,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:21,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:21,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:21,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:21,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:21,955 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:36:21,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 09:36:21,995 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 09:36:21,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:21,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:22,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-18 09:36:22,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 09:36:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 09:36:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 09:36:22,034 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 9 states. [2018-11-18 09:36:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:22,064 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 09:36:22,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 09:36:22,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-11-18 09:36:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:22,065 INFO L225 Difference]: With dead ends: 49 [2018-11-18 09:36:22,065 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 09:36:22,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 09:36:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 09:36:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2018-11-18 09:36:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 09:36:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-11-18 09:36:22,068 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 36 [2018-11-18 09:36:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:22,069 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-11-18 09:36:22,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 09:36:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-11-18 09:36:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 09:36:22,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:22,070 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:22,070 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:22,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1299639876, now seen corresponding path program 6 times [2018-11-18 09:36:22,070 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:22,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:22,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:22,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:22,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:36:22,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 09:36:22,194 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 09:36:22,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:22,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:22,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-18 09:36:22,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 09:36:22,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 09:36:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 09:36:22,225 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2018-11-18 09:36:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:22,257 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-11-18 09:36:22,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 09:36:22,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2018-11-18 09:36:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:22,258 INFO L225 Difference]: With dead ends: 54 [2018-11-18 09:36:22,258 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 09:36:22,259 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 09:36:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 09:36:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2018-11-18 09:36:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 09:36:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 09:36:22,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 41 [2018-11-18 09:36:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:22,262 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 09:36:22,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 09:36:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 09:36:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-18 09:36:22,263 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:22,264 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:22,264 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:22,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:22,264 INFO L82 PathProgramCache]: Analyzing trace with hash -317278360, now seen corresponding path program 7 times [2018-11-18 09:36:22,264 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:22,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:22,341 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:36:22,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:22,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:22,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-18 09:36:22,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 09:36:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 09:36:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 09:36:22,390 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2018-11-18 09:36:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:22,420 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-11-18 09:36:22,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 09:36:22,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2018-11-18 09:36:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:22,421 INFO L225 Difference]: With dead ends: 59 [2018-11-18 09:36:22,421 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 09:36:22,421 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 09:36:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 09:36:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2018-11-18 09:36:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 09:36:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-11-18 09:36:22,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 46 [2018-11-18 09:36:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:22,425 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-11-18 09:36:22,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 09:36:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-11-18 09:36:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-18 09:36:22,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:22,426 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:22,426 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:22,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:22,427 INFO L82 PathProgramCache]: Analyzing trace with hash -137773764, now seen corresponding path program 8 times [2018-11-18 09:36:22,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:22,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:22,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:36:22,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:22,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:36:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:36:22,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:36:22,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:22,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:22,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-18 09:36:22,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 09:36:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 09:36:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:36:22,551 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states. [2018-11-18 09:36:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:22,580 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 09:36:22,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:36:22,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-11-18 09:36:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:22,581 INFO L225 Difference]: With dead ends: 64 [2018-11-18 09:36:22,581 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 09:36:22,581 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:36:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 09:36:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2018-11-18 09:36:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 09:36:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-11-18 09:36:22,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2018-11-18 09:36:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:22,585 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-11-18 09:36:22,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 09:36:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-11-18 09:36:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 09:36:22,586 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:22,587 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:22,587 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:22,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:22,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1762313240, now seen corresponding path program 9 times [2018-11-18 09:36:22,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:22,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:22,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:22,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:36:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:36:22,695 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:36:22,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:36:22,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 09:36:22,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:36:22,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:36:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:36:22,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:36:22,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-18 09:36:22,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 09:36:22,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 09:36:22,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 09:36:22,819 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 13 states. [2018-11-18 09:36:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:36:22,865 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2018-11-18 09:36:22,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 09:36:22,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2018-11-18 09:36:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:36:22,866 INFO L225 Difference]: With dead ends: 66 [2018-11-18 09:36:22,866 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 09:36:22,866 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 09:36:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 09:36:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 09:36:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 09:36:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 09:36:22,870 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 56 [2018-11-18 09:36:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:36:22,870 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 09:36:22,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 09:36:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 09:36:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 09:36:22,872 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:36:22,872 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:36:22,873 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-11-18 09:36:22,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:36:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash -490075972, now seen corresponding path program 10 times [2018-11-18 09:36:22,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:36:22,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:36:22,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:36:22,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:36:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:36:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:36:22,919 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 09:36:22,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:36:22 BoogieIcfgContainer [2018-11-18 09:36:22,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:36:22,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:36:22,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:36:22,948 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:36:22,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:36:20" (3/4) ... [2018-11-18 09:36:22,951 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 09:36:22,996 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_28477fef-54f6-4dbd-b154-24ef3c2d6ced/bin-2019/uautomizer/witness.graphml [2018-11-18 09:36:22,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:36:22,997 INFO L168 Benchmark]: Toolchain (without parser) took 2677.39 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 239.1 MB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -225.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:22,998 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:36:22,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.44 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:22,999 INFO L168 Benchmark]: Boogie Preprocessor took 25.09 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:22,999 INFO L168 Benchmark]: RCFGBuilder took 244.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:22,999 INFO L168 Benchmark]: TraceAbstraction took 2206.94 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -43.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:23,000 INFO L168 Benchmark]: Witness Printer took 49.08 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:36:23,001 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.44 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.09 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 244.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2206.94 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -43.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. * Witness Printer took 49.08 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] EXPR, FCALL malloc(10 * sizeof(int)) [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=6, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=6, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=7, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=7, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=8, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=8, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=9, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i < 10 [L11] FCALL p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, i=9, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] i++ VAL [i=10, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i < 10) VAL [i=10, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L14] free(p) [L14] FCALL free(p) VAL [i=10, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L16] FCALL p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 7 error locations. UNSAFE Result, 2.1s OverallTime, 16 OverallIterations, 11 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 278 SDtfs, 221 SDslu, 663 SDs, 0 SdLazy, 299 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 404 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=15, 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, 15 MinimizatonAttempts, 43 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 772 NumberOfCodeBlocks, 772 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 687 ConstructedInterpolants, 0 QuantifiedInterpolants, 67445 SizeOfPredicates, 9 NumberOfNonLiveVariables, 963 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 5/1385 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...