./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 07:29:05,163 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 07:29:05,163 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 07:29:05,169 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 07:29:05,170 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 07:29:05,170 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 07:29:05,171 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 07:29:05,172 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 07:29:05,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 07:29:05,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 07:29:05,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 07:29:05,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 07:29:05,174 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 07:29:05,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 07:29:05,175 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 07:29:05,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 07:29:05,176 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 07:29:05,177 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 07:29:05,178 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 07:29:05,179 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 07:29:05,179 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 07:29:05,180 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 07:29:05,181 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 07:29:05,181 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 07:29:05,182 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 07:29:05,182 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 07:29:05,183 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 07:29:05,183 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 07:29:05,184 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 07:29:05,184 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 07:29:05,184 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 07:29:05,185 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 07:29:05,185 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 07:29:05,185 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 07:29:05,185 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 07:29:05,186 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 07:29:05,186 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-12-02 07:29:05,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 07:29:05,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 07:29:05,194 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 07:29:05,194 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 07:29:05,194 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 07:29:05,194 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 07:29:05,195 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 07:29:05,195 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 07:29:05,196 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 07:29:05,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 07:29:05,196 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 07:29:05,196 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_890a8d95-9fad-4cee-b01b-3771c3e47584/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 -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2018-12-02 07:29:05,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 07:29:05,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 07:29:05,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 07:29:05,226 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 07:29:05,227 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 07:29:05,227 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-02 07:29:05,270 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/data/53fa60c45/d29f463528a4405089633e85c87a307e/FLAG318af3ecc [2018-12-02 07:29:05,696 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 07:29:05,696 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-02 07:29:05,700 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/data/53fa60c45/d29f463528a4405089633e85c87a307e/FLAG318af3ecc [2018-12-02 07:29:05,708 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/data/53fa60c45/d29f463528a4405089633e85c87a307e [2018-12-02 07:29:05,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 07:29:05,710 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-12-02 07:29:05,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 07:29:05,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 07:29:05,713 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 07:29:05,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7962e2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05, skipping insertion in model container [2018-12-02 07:29:05,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 07:29:05,729 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 07:29:05,812 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 07:29:05,817 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 07:29:05,827 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 07:29:05,837 INFO L195 MainTranslator]: Completed translation [2018-12-02 07:29:05,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05 WrapperNode [2018-12-02 07:29:05,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 07:29:05,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 07:29:05,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 07:29:05,839 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 07:29:05,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... [2018-12-02 07:29:05,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 07:29:05,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 07:29:05,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 07:29:05,890 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 07:29:05,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 07:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 07:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-12-02 07:29:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 07:29:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 07:29:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 07:29:06,080 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 07:29:06,081 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-02 07:29:06,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:29:06 BoogieIcfgContainer [2018-12-02 07:29:06,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 07:29:06,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 07:29:06,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 07:29:06,084 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 07:29:06,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:29:05" (1/3) ... [2018-12-02 07:29:06,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25894bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:29:06, skipping insertion in model container [2018-12-02 07:29:06,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:29:05" (2/3) ... [2018-12-02 07:29:06,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25894bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:29:06, skipping insertion in model container [2018-12-02 07:29:06,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:29:06" (3/3) ... [2018-12-02 07:29:06,086 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-12-02 07:29:06,092 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 07:29:06,096 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-02 07:29:06,108 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-02 07:29:06,124 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 07:29:06,124 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 07:29:06,124 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 07:29:06,125 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 07:29:06,125 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 07:29:06,125 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 07:29:06,125 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 07:29:06,125 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 07:29:06,125 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 07:29:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-12-02 07:29:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 07:29:06,140 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,141 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,142 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2018-12-02 07:29:06,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 07:29:06,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 07:29:06,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 07:29:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 07:29:06,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 07:29:06,250 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2018-12-02 07:29:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,292 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-12-02 07:29:06,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 07:29:06,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 07:29:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,298 INFO L225 Difference]: With dead ends: 58 [2018-12-02 07:29:06,298 INFO L226 Difference]: Without dead ends: 54 [2018-12-02 07:29:06,299 INFO L631 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 [2018-12-02 07:29:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-02 07:29:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2018-12-02 07:29:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 07:29:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-12-02 07:29:06,323 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2018-12-02 07:29:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,323 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-12-02 07:29:06,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 07:29:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-12-02 07:29:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-02 07:29:06,323 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,323 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,324 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2018-12-02 07:29:06,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 07:29:06,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 07:29:06,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 07:29:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 07:29:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 07:29:06,347 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 3 states. [2018-12-02 07:29:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,373 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-12-02 07:29:06,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 07:29:06,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-12-02 07:29:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,375 INFO L225 Difference]: With dead ends: 49 [2018-12-02 07:29:06,376 INFO L226 Difference]: Without dead ends: 49 [2018-12-02 07:29:06,376 INFO L631 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 [2018-12-02 07:29:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-02 07:29:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2018-12-02 07:29:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-02 07:29:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-12-02 07:29:06,379 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2018-12-02 07:29:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,379 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-12-02 07:29:06,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 07:29:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-12-02 07:29:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-02 07:29:06,380 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,380 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,380 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2018-12-02 07:29:06,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 07:29:06,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 07:29:06,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 07:29:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 07:29:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 07:29:06,415 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2018-12-02 07:29:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,459 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-02 07:29:06,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 07:29:06,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-02 07:29:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,460 INFO L225 Difference]: With dead ends: 40 [2018-12-02 07:29:06,460 INFO L226 Difference]: Without dead ends: 40 [2018-12-02 07:29:06,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 07:29:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-02 07:29:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-02 07:29:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-02 07:29:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-12-02 07:29:06,463 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2018-12-02 07:29:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,464 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-12-02 07:29:06,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 07:29:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-12-02 07:29:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-02 07:29:06,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,464 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2018-12-02 07:29:06,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 07:29:06,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 07:29:06,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 07:29:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 07:29:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 07:29:06,529 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2018-12-02 07:29:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,585 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-02 07:29:06,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 07:29:06,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-02 07:29:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,586 INFO L225 Difference]: With dead ends: 42 [2018-12-02 07:29:06,586 INFO L226 Difference]: Without dead ends: 42 [2018-12-02 07:29:06,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 07:29:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-02 07:29:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-12-02 07:29:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 07:29:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-12-02 07:29:06,590 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 12 [2018-12-02 07:29:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,590 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-12-02 07:29:06,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 07:29:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-12-02 07:29:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-02 07:29:06,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,591 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,591 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2018-12-02 07:29:06,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 07:29:06,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 07:29:06,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 07:29:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 07:29:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 07:29:06,646 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2018-12-02 07:29:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,673 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-12-02 07:29:06,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 07:29:06,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-02 07:29:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,674 INFO L225 Difference]: With dead ends: 45 [2018-12-02 07:29:06,674 INFO L226 Difference]: Without dead ends: 42 [2018-12-02 07:29:06,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 07:29:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-02 07:29:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-12-02 07:29:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 07:29:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-12-02 07:29:06,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 15 [2018-12-02 07:29:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,678 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-12-02 07:29:06,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 07:29:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-12-02 07:29:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 07:29:06,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,679 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,679 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2018-12-02 07:29:06,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:06,726 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:06,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 07:29:06,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2018-12-02 07:29:06,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 07:29:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 07:29:06,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-02 07:29:06,780 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2018-12-02 07:29:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:06,845 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-12-02 07:29:06,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 07:29:06,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-12-02 07:29:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:06,846 INFO L225 Difference]: With dead ends: 47 [2018-12-02 07:29:06,846 INFO L226 Difference]: Without dead ends: 47 [2018-12-02 07:29:06,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-12-02 07:29:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-02 07:29:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-02 07:29:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-02 07:29:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-12-02 07:29:06,849 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 16 [2018-12-02 07:29:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:06,849 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-12-02 07:29:06,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 07:29:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-12-02 07:29:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 07:29:06,850 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:06,850 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:06,850 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:06,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash -661735507, now seen corresponding path program 1 times [2018-12-02 07:29:06,850 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:06,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:06,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:06,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:06,944 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:06,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:06,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:07,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 07:29:07,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-02 07:29:07,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 07:29:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 07:29:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-12-02 07:29:07,045 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 12 states. [2018-12-02 07:29:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:07,169 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2018-12-02 07:29:07,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 07:29:07,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2018-12-02 07:29:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:07,170 INFO L225 Difference]: With dead ends: 59 [2018-12-02 07:29:07,170 INFO L226 Difference]: Without dead ends: 56 [2018-12-02 07:29:07,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2018-12-02 07:29:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-02 07:29:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-12-02 07:29:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-02 07:29:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2018-12-02 07:29:07,173 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 30 [2018-12-02 07:29:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:07,174 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2018-12-02 07:29:07,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 07:29:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2018-12-02 07:29:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-02 07:29:07,174 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:07,174 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:07,174 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:07,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723374, now seen corresponding path program 2 times [2018-12-02 07:29:07,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:07,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:07,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:07,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:07,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:07,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:07,309 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:07,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 07:29:07,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-02 07:29:07,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 07:29:07,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:07,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 07:29:07,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 27 [2018-12-02 07:29:07,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-02 07:29:07,352 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 07:29:07,355 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 07:29:07,358 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 07:29:07,358 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2018-12-02 07:29:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-02 07:29:07,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 07:29:07,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-12-02 07:29:07,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 07:29:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 07:29:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-12-02 07:29:07,439 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 10 states. [2018-12-02 07:29:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:07,605 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2018-12-02 07:29:07,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 07:29:07,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2018-12-02 07:29:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:07,606 INFO L225 Difference]: With dead ends: 62 [2018-12-02 07:29:07,606 INFO L226 Difference]: Without dead ends: 59 [2018-12-02 07:29:07,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2018-12-02 07:29:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-02 07:29:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-12-02 07:29:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 07:29:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-12-02 07:29:07,609 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 35 [2018-12-02 07:29:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:07,609 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-12-02 07:29:07,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 07:29:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-12-02 07:29:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-02 07:29:07,610 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:07,610 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:07,610 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:07,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1819430834, now seen corresponding path program 1 times [2018-12-02 07:29:07,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:07,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:07,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:07,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 07:29:07,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:07,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:07,782 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:07,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:07,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:07,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 07:29:07,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-12-02 07:29:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 07:29:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 07:29:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-12-02 07:29:07,886 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 16 states. [2018-12-02 07:29:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:08,039 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2018-12-02 07:29:08,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 07:29:08,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2018-12-02 07:29:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:08,040 INFO L225 Difference]: With dead ends: 67 [2018-12-02 07:29:08,040 INFO L226 Difference]: Without dead ends: 64 [2018-12-02 07:29:08,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2018-12-02 07:29:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-02 07:29:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-12-02 07:29:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-02 07:29:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2018-12-02 07:29:08,043 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 40 [2018-12-02 07:29:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:08,043 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2018-12-02 07:29:08,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 07:29:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2018-12-02 07:29:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-02 07:29:08,044 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:08,044 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:08,044 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:08,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2080753, now seen corresponding path program 2 times [2018-12-02 07:29:08,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:08,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:08,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:08,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:08,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:08,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:08,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 07:29:08,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-02 07:29:08,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 07:29:08,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:08,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-02 07:29:08,203 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-02 07:29:08,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 07:29:08,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-12-02 07:29:08,211 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,214 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 07:29:08,219 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-12-02 07:29:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-12-02 07:29:08,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 07:29:08,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2018-12-02 07:29:08,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 07:29:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 07:29:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-12-02 07:29:08,301 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 13 states. [2018-12-02 07:29:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:08,500 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-12-02 07:29:08,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 07:29:08,500 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-12-02 07:29:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:08,500 INFO L225 Difference]: With dead ends: 70 [2018-12-02 07:29:08,501 INFO L226 Difference]: Without dead ends: 67 [2018-12-02 07:29:08,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2018-12-02 07:29:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-02 07:29:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-12-02 07:29:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-02 07:29:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2018-12-02 07:29:08,504 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 45 [2018-12-02 07:29:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:08,504 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2018-12-02 07:29:08,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 07:29:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2018-12-02 07:29:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-02 07:29:08,505 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:08,505 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:08,505 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:08,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1165684695, now seen corresponding path program 1 times [2018-12-02 07:29:08,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:08,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 07:29:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-12-02 07:29:08,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:08,533 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:08,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:08,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 07:29:08,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 07:29:08,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11] total 13 [2018-12-02 07:29:08,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 07:29:08,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 07:29:08,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-12-02 07:29:08,648 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 13 states. [2018-12-02 07:29:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:08,729 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-12-02 07:29:08,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 07:29:08,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2018-12-02 07:29:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:08,730 INFO L225 Difference]: With dead ends: 99 [2018-12-02 07:29:08,730 INFO L226 Difference]: Without dead ends: 96 [2018-12-02 07:29:08,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-12-02 07:29:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-02 07:29:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2018-12-02 07:29:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-02 07:29:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2018-12-02 07:29:08,735 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 59 [2018-12-02 07:29:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:08,735 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2018-12-02 07:29:08,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 07:29:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2018-12-02 07:29:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-12-02 07:29:08,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 07:29:08,738 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 07:29:08,738 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 07:29:08,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 07:29:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2018-12-02 07:29:08,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 07:29:08,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 07:29:08,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 07:29:08,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 07:29:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 07:29:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2018-12-02 07:29:08,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 07:29:08,795 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/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 [2018-12-02 07:29:08,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 07:29:08,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-02 07:29:08,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 07:29:08,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 07:29:08,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 07:29:08,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-12-02 07:29:08,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-02 07:29:08,836 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,851 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,856 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-02 07:29:08,856 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-02 07:29:08,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-02 07:29:08,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-12-02 07:29:08,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-12-02 07:29:08,909 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 07:29:08,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-02 07:29:08,918 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-02 07:29:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-12-02 07:29:09,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 07:29:09,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-12-02 07:29:09,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 07:29:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 07:29:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2018-12-02 07:29:09,587 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 9 states. [2018-12-02 07:29:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 07:29:18,736 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-12-02 07:29:18,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 07:29:18,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2018-12-02 07:29:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 07:29:18,737 INFO L225 Difference]: With dead ends: 101 [2018-12-02 07:29:18,737 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 07:29:18,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=173, Unknown=1, NotChecked=0, Total=240 [2018-12-02 07:29:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 07:29:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 07:29:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 07:29:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 07:29:18,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2018-12-02 07:29:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 07:29:18,738 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 07:29:18,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 07:29:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 07:29:18,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 07:29:18,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 07:29:18 BoogieIcfgContainer [2018-12-02 07:29:18,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 07:29:18,741 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 07:29:18,741 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 07:29:18,742 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 07:29:18,742 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:29:06" (3/4) ... [2018-12-02 07:29:18,744 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 07:29:18,748 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 07:29:18,748 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-12-02 07:29:18,748 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 07:29:18,751 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2018-12-02 07:29:18,751 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-02 07:29:18,751 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-02 07:29:18,751 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 07:29:18,775 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_890a8d95-9fad-4cee-b01b-3771c3e47584/bin-2019/uautomizer/witness.graphml [2018-12-02 07:29:18,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 07:29:18,776 INFO L168 Benchmark]: Toolchain (without parser) took 13066.01 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 284.7 MB). Free memory was 962.4 MB in the beginning and 1.3 GB in the end (delta: -316.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 07:29:18,777 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 07:29:18,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.95 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 950.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-02 07:29:18,777 INFO L168 Benchmark]: Boogie Preprocessor took 51.01 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-02 07:29:18,777 INFO L168 Benchmark]: RCFGBuilder took 191.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2018-12-02 07:29:18,778 INFO L168 Benchmark]: TraceAbstraction took 12659.63 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -198.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 07:29:18,778 INFO L168 Benchmark]: Witness Printer took 33.83 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2018-12-02 07:29:18,779 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 126.95 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 950.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 51.01 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 191.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12659.63 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -198.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 33.83 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. SAFE Result, 12.6s OverallTime, 12 OverallIterations, 16 TraceHistogramMax, 10.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 315 SDtfs, 483 SDslu, 1344 SDs, 0 SdLazy, 946 SolverSat, 81 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 9.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 317 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=11, 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, 12 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 740 NumberOfCodeBlocks, 588 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 721 ConstructedInterpolants, 159 QuantifiedInterpolants, 362989 SizeOfPredicates, 8 NumberOfNonLiveVariables, 665 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 1511/1896 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...