./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-1dbac8b [2018-10-27 04:45:07,660 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:45:07,662 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:45:07,669 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:45:07,670 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:45:07,671 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:45:07,671 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:45:07,673 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:45:07,675 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:45:07,675 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:45:07,676 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:45:07,676 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:45:07,677 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:45:07,678 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:45:07,679 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:45:07,680 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:45:07,680 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:45:07,682 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:45:07,683 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:45:07,685 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:45:07,686 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:45:07,687 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:45:07,689 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:45:07,689 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:45:07,689 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:45:07,690 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:45:07,694 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:45:07,695 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:45:07,696 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:45:07,696 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:45:07,697 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:45:07,697 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 04:45:07,697 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 04:45:07,697 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 04:45:07,699 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 04:45:07,699 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 04:45:07,700 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-10-27 04:45:07,710 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:45:07,711 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:45:07,712 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 04:45:07,712 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 04:45:07,712 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 04:45:07,712 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:45:07,712 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 04:45:07,712 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 04:45:07,712 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:45:07,713 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 04:45:07,714 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:45:07,714 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:45:07,715 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:45:07,716 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:45:07,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:45:07,716 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:45:07,716 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:45:07,716 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 04:45:07,716 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:45:07,717 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_2878a47a-9506-4a71-a249-3a516ee1214c/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 -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2018-10-27 04:45:07,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:45:07,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:45:07,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:45:07,754 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:45:07,754 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:45:07,755 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2_false-valid-deref.c [2018-10-27 04:45:07,803 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/data/045efcbc4/d2ec5523371147118feb9b7def35376a/FLAG3388e7af2 [2018-10-27 04:45:08,156 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:45:08,157 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/sv-benchmarks/c/memsafety-ext3/derefAfterFree2_false-valid-deref.c [2018-10-27 04:45:08,161 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/data/045efcbc4/d2ec5523371147118feb9b7def35376a/FLAG3388e7af2 [2018-10-27 04:45:08,172 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/data/045efcbc4/d2ec5523371147118feb9b7def35376a [2018-10-27 04:45:08,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:45:08,176 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 04:45:08,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:45:08,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:45:08,180 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:45:08,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bde366b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08, skipping insertion in model container [2018-10-27 04:45:08,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:45:08,212 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:45:08,342 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:45:08,349 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:45:08,360 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:45:08,375 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:45:08,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08 WrapperNode [2018-10-27 04:45:08,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:45:08,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:45:08,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:45:08,377 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:45:08,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... [2018-10-27 04:45:08,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:45:08,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:45:08,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:45:08,409 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:45:08,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:08,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:45:08,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:45:08,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:45:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-10-27 04:45:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-10-27 04:45:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:45:08,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-10-27 04:45:08,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-27 04:45:08,960 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:45:08,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:45:08 BoogieIcfgContainer [2018-10-27 04:45:08,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:45:08,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:45:08,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:45:08,964 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:45:08,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:45:08" (1/3) ... [2018-10-27 04:45:08,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff44669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:45:08, skipping insertion in model container [2018-10-27 04:45:08,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:45:08" (2/3) ... [2018-10-27 04:45:08,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff44669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:45:08, skipping insertion in model container [2018-10-27 04:45:08,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:45:08" (3/3) ... [2018-10-27 04:45:08,967 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree2_false-valid-deref.c [2018-10-27 04:45:08,977 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:45:08,984 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-10-27 04:45:09,001 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-10-27 04:45:09,023 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 04:45:09,024 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:45:09,024 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-27 04:45:09,024 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:45:09,024 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:45:09,025 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:45:09,025 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:45:09,025 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:45:09,025 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:45:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-10-27 04:45:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:45:09,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:09,048 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:09,050 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:09,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1751560475, now seen corresponding path program 1 times [2018-10-27 04:45:09,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:09,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:09,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:09,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:09,166 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:45:09,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:45:09,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 04:45:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 04:45:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:45:09,184 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-10-27 04:45:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:09,199 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-27 04:45:09,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 04:45:09,201 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-27 04:45:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:09,210 INFO L225 Difference]: With dead ends: 25 [2018-10-27 04:45:09,210 INFO L226 Difference]: Without dead ends: 22 [2018-10-27 04:45:09,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:45:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-27 04:45:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-27 04:45:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-27 04:45:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-27 04:45:09,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2018-10-27 04:45:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:09,244 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-27 04:45:09,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 04:45:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-27 04:45:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:45:09,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:09,245 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:09,245 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:09,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1751538725, now seen corresponding path program 1 times [2018-10-27 04:45:09,248 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:09,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:09,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:09,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:09,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:45:09,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:45:09,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:45:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:45:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:45:09,349 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2018-10-27 04:45:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:09,538 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-27 04:45:09,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:45:09,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-27 04:45:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:09,540 INFO L225 Difference]: With dead ends: 42 [2018-10-27 04:45:09,540 INFO L226 Difference]: Without dead ends: 42 [2018-10-27 04:45:09,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:45:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-27 04:45:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2018-10-27 04:45:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-27 04:45:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-27 04:45:09,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-10-27 04:45:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:09,545 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-27 04:45:09,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:45:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-27 04:45:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 04:45:09,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:09,549 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:09,550 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:09,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1751538726, now seen corresponding path program 1 times [2018-10-27 04:45:09,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:09,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:09,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:09,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:09,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:45:09,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:45:09,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:45:09,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:45:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:45:09,682 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2018-10-27 04:45:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:09,892 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-27 04:45:09,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:45:09,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-27 04:45:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:09,894 INFO L225 Difference]: With dead ends: 30 [2018-10-27 04:45:09,894 INFO L226 Difference]: Without dead ends: 30 [2018-10-27 04:45:09,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:45:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-27 04:45:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-27 04:45:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-27 04:45:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-27 04:45:09,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2018-10-27 04:45:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:09,899 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-27 04:45:09,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:45:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-27 04:45:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 04:45:09,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:09,900 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:09,900 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:09,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 607778567, now seen corresponding path program 1 times [2018-10-27 04:45:09,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:09,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:09,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:09,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:10,218 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-10-27 04:45:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:10,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:45:10,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 04:45:10,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 04:45:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 04:45:10,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:45:10,221 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2018-10-27 04:45:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:10,339 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-10-27 04:45:10,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:45:10,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-27 04:45:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:10,340 INFO L225 Difference]: With dead ends: 28 [2018-10-27 04:45:10,340 INFO L226 Difference]: Without dead ends: 28 [2018-10-27 04:45:10,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:45:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-27 04:45:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-27 04:45:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-27 04:45:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-10-27 04:45:10,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2018-10-27 04:45:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:10,344 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-10-27 04:45:10,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 04:45:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-10-27 04:45:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 04:45:10,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:10,345 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:10,345 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:10,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1661265003, now seen corresponding path program 1 times [2018-10-27 04:45:10,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:10,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:10,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:10,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:10,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:45:10,379 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:10,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:10,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:45:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:10,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 04:45:10,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-27 04:45:10,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 04:45:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 04:45:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:45:10,473 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2018-10-27 04:45:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:10,512 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-27 04:45:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:45:10,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-27 04:45:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:10,515 INFO L225 Difference]: With dead ends: 33 [2018-10-27 04:45:10,515 INFO L226 Difference]: Without dead ends: 33 [2018-10-27 04:45:10,515 INFO L605 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 [2018-10-27 04:45:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-27 04:45:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-27 04:45:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-27 04:45:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-27 04:45:10,520 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2018-10-27 04:45:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:10,520 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-27 04:45:10,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 04:45:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-27 04:45:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-27 04:45:10,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:10,521 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:10,521 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:10,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1298722164, now seen corresponding path program 2 times [2018-10-27 04:45:10,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:10,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:45:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:10,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:45:10,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:10,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 04:45:10,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 04:45:10,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:45:10,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:45:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:10,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 04:45:10,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-27 04:45:10,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 04:45:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 04:45:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 04:45:10,842 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2018-10-27 04:45:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:10,915 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-27 04:45:10,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:45:10,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-10-27 04:45:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:10,916 INFO L225 Difference]: With dead ends: 38 [2018-10-27 04:45:10,916 INFO L226 Difference]: Without dead ends: 38 [2018-10-27 04:45:10,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 04:45:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-27 04:45:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-27 04:45:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-27 04:45:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-27 04:45:10,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 21 [2018-10-27 04:45:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:10,919 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-27 04:45:10,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 04:45:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-27 04:45:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-27 04:45:10,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:10,920 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:10,921 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:10,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash 92377355, now seen corresponding path program 3 times [2018-10-27 04:45:10,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:10,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:10,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:45:10,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:45:11,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:11,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:45:11,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-27 04:45:11,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:45:11,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:45:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 04:45:11,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-27 04:45:11,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 04:45:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 04:45:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:45:11,066 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2018-10-27 04:45:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:11,097 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-27 04:45:11,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:45:11,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-10-27 04:45:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:11,099 INFO L225 Difference]: With dead ends: 43 [2018-10-27 04:45:11,099 INFO L226 Difference]: Without dead ends: 43 [2018-10-27 04:45:11,099 INFO L605 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 [2018-10-27 04:45:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-27 04:45:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-27 04:45:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 04:45:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-27 04:45:11,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 26 [2018-10-27 04:45:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:11,106 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-27 04:45:11,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 04:45:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-27 04:45:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-27 04:45:11,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:11,107 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:11,107 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:11,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -802338324, now seen corresponding path program 4 times [2018-10-27 04:45:11,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:11,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:11,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:45:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:45:11,184 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:11,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 04:45:11,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 04:45:11,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:45:11,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:45:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 04:45:11,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-27 04:45:11,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 04:45:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 04:45:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 04:45:11,281 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 8 states. [2018-10-27 04:45:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:11,360 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-27 04:45:11,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 04:45:11,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-27 04:45:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:11,361 INFO L225 Difference]: With dead ends: 48 [2018-10-27 04:45:11,361 INFO L226 Difference]: Without dead ends: 48 [2018-10-27 04:45:11,362 INFO L605 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 [2018-10-27 04:45:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-27 04:45:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-27 04:45:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-27 04:45:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-27 04:45:11,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 31 [2018-10-27 04:45:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:11,365 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-27 04:45:11,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 04:45:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-27 04:45:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 04:45:11,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:11,366 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:11,370 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:11,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1946613163, now seen corresponding path program 5 times [2018-10-27 04:45:11,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:11,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:11,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:11,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:45:11,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:45:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:45:11,512 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/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 [2018-10-27 04:45:11,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-27 04:45:11,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-27 04:45:11,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:45:11,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:45:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:45:11,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 04:45:11,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2018-10-27 04:45:11,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 04:45:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 04:45:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2018-10-27 04:45:11,869 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 15 states. [2018-10-27 04:45:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:45:12,250 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2018-10-27 04:45:12,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 04:45:12,255 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2018-10-27 04:45:12,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:45:12,256 INFO L225 Difference]: With dead ends: 66 [2018-10-27 04:45:12,256 INFO L226 Difference]: Without dead ends: 66 [2018-10-27 04:45:12,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2018-10-27 04:45:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-27 04:45:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-27 04:45:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-27 04:45:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2018-10-27 04:45:12,264 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 36 [2018-10-27 04:45:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:45:12,264 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2018-10-27 04:45:12,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 04:45:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2018-10-27 04:45:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 04:45:12,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:45:12,265 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:45:12,266 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-10-27 04:45:12,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:45:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1325039382, now seen corresponding path program 1 times [2018-10-27 04:45:12,268 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 04:45:12,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 04:45:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:12,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 04:45:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:45:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 04:45:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 04:45:12,315 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 04:45:12,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:45:12 BoogieIcfgContainer [2018-10-27 04:45:12,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:45:12,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 04:45:12,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 04:45:12,347 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 04:45:12,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:45:08" (3/4) ... [2018-10-27 04:45:12,351 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-27 04:45:12,400 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2878a47a-9506-4a71-a249-3a516ee1214c/bin-2019/uautomizer/witness.graphml [2018-10-27 04:45:12,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 04:45:12,401 INFO L168 Benchmark]: Toolchain (without parser) took 4225.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 963.4 MB in the beginning and 891.0 MB in the end (delta: 72.4 MB). Peak memory consumption was 223.4 MB. Max. memory is 11.5 GB. [2018-10-27 04:45:12,401 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:45:12,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.83 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 04:45:12,402 INFO L168 Benchmark]: Boogie Preprocessor took 31.78 ms. Allocated memory is still 1.0 GB. Free memory was 952.6 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-27 04:45:12,402 INFO L168 Benchmark]: RCFGBuilder took 551.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-10-27 04:45:12,403 INFO L168 Benchmark]: TraceAbstraction took 3385.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 891.0 MB in the end (delta: 244.0 MB). Peak memory consumption was 244.0 MB. Max. memory is 11.5 GB. [2018-10-27 04:45:12,403 INFO L168 Benchmark]: Witness Printer took 53.01 ms. Allocated memory is still 1.2 GB. Free memory is still 891.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:45:12,405 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 199.83 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.78 ms. Allocated memory is still 1.0 GB. Free memory was 952.6 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 551.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3385.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 891.0 MB in the end (delta: 244.0 MB). Peak memory consumption was 244.0 MB. Max. memory is 11.5 GB. * Witness Printer took 53.01 ms. Allocated memory is still 1.2 GB. Free memory is still 891.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] EXPR, FCALL malloc(10 * sizeof(int)) VAL [malloc(10 * sizeof(int))={42:0}] [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i == 5) VAL [i=0, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i == 5) VAL [i=1, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i == 5) VAL [i=2, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i == 5) VAL [i=3, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND FALSE !(i == 5) VAL [i=4, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L10] COND TRUE i == 5 VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L11] FCALL free(p) VAL [i=5, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] i++ VAL [i=6, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L8] COND TRUE i < 10 VAL [i=6, malloc(10 * sizeof(int))={42:0}, p={42:0}] [L9] FCALL p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 5 error locations. UNSAFE Result, 3.3s OverallTime, 10 OverallIterations, 7 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 304 SDslu, 296 SDs, 0 SdLazy, 224 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 23 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 348 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 291 ConstructedInterpolants, 0 QuantifiedInterpolants, 20877 SizeOfPredicates, 5 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 21/263 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...