./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i --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_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45292d949331e02d780a7679ac12098a89a953bb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45292d949331e02d780a7679ac12098a89a953bb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 22:36:33,312 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 22:36:33,313 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 22:36:33,319 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 22:36:33,319 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 22:36:33,320 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 22:36:33,321 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 22:36:33,321 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 22:36:33,322 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 22:36:33,323 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 22:36:33,323 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 22:36:33,323 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 22:36:33,324 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 22:36:33,325 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 22:36:33,325 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 22:36:33,326 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 22:36:33,326 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 22:36:33,327 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 22:36:33,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 22:36:33,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 22:36:33,329 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 22:36:33,330 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 22:36:33,331 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 22:36:33,331 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 22:36:33,331 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 22:36:33,332 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 22:36:33,332 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 22:36:33,333 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 22:36:33,333 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 22:36:33,334 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 22:36:33,334 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 22:36:33,334 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 22:36:33,334 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 22:36:33,334 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 22:36:33,335 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 22:36:33,335 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 22:36:33,336 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-01 22:36:33,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 22:36:33,343 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 22:36:33,344 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 22:36:33,344 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 22:36:33,344 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-01 22:36:33,344 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-01 22:36:33,344 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-01 22:36:33,345 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-01 22:36:33,346 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 22:36:33,346 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 22:36:33,346 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 22:36:33,347 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 22:36:33,347 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 22:36:33,348 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 22:36:33,348 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan 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 -> Taipan 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 -> 45292d949331e02d780a7679ac12098a89a953bb [2018-12-01 22:36:33,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 22:36:33,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 22:36:33,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 22:36:33,376 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 22:36:33,376 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 22:36:33,377 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:33,413 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/3cc7adbc6/308c9674654049d59ca2c2757eb251f4/FLAGbab05629c [2018-12-01 22:36:33,823 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 22:36:33,823 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:33,829 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/3cc7adbc6/308c9674654049d59ca2c2757eb251f4/FLAGbab05629c [2018-12-01 22:36:34,163 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/3cc7adbc6/308c9674654049d59ca2c2757eb251f4 [2018-12-01 22:36:34,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 22:36:34,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 22:36:34,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 22:36:34,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 22:36:34,180 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 22:36:34,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c26117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34, skipping insertion in model container [2018-12-01 22:36:34,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 22:36:34,214 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 22:36:34,372 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:36:34,379 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 22:36:34,440 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:36:34,465 INFO L195 MainTranslator]: Completed translation [2018-12-01 22:36:34,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34 WrapperNode [2018-12-01 22:36:34,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 22:36:34,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 22:36:34,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 22:36:34,466 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 22:36:34,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 22:36:34,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 22:36:34,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 22:36:34,486 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 22:36:34,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... [2018-12-01 22:36:34,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 22:36:34,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 22:36:34,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 22:36:34,505 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 22:36:34,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/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 [2018-12-01 22:36:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-01 22:36:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-01 22:36:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 22:36:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-01 22:36:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-01 22:36:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 22:36:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 22:36:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 22:36:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 22:36:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-01 22:36:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-01 22:36:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 22:36:34,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 22:36:34,739 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 22:36:34,739 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 22:36:34,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:34 BoogieIcfgContainer [2018-12-01 22:36:34,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 22:36:34,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 22:36:34,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 22:36:34,742 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 22:36:34,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 10:36:34" (1/3) ... [2018-12-01 22:36:34,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c784d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:36:34, skipping insertion in model container [2018-12-01 22:36:34,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:34" (2/3) ... [2018-12-01 22:36:34,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c784d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:36:34, skipping insertion in model container [2018-12-01 22:36:34,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:34" (3/3) ... [2018-12-01 22:36:34,744 INFO L112 eAbstractionObserver]: Analyzing ICFG list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:34,750 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 22:36:34,754 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2018-12-01 22:36:34,763 INFO L257 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2018-12-01 22:36:34,778 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 22:36:34,778 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-01 22:36:34,778 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 22:36:34,778 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 22:36:34,778 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 22:36:34,779 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 22:36:34,779 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 22:36:34,779 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 22:36:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2018-12-01 22:36:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 22:36:34,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:34,793 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:34,794 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:34,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1319059633, now seen corresponding path program 1 times [2018-12-01 22:36:34,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:34,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:34,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:34,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:34,827 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:34,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:34,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-01 22:36:34,870 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:34,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 22:36:34,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 22:36:34,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 22:36:34,883 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 2 states. [2018-12-01 22:36:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:34,895 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2018-12-01 22:36:34,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 22:36:34,896 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-12-01 22:36:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:34,901 INFO L225 Difference]: With dead ends: 72 [2018-12-01 22:36:34,901 INFO L226 Difference]: Without dead ends: 63 [2018-12-01 22:36:34,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 22:36:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-01 22:36:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-01 22:36:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-01 22:36:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2018-12-01 22:36:34,923 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 11 [2018-12-01 22:36:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:34,923 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2018-12-01 22:36:34,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 22:36:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2018-12-01 22:36:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 22:36:34,924 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:34,924 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:34,924 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:34,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1319085259, now seen corresponding path program 1 times [2018-12-01 22:36:34,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:34,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:34,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:34,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:34,925 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:34,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:34,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 22:36:34,965 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:34,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:36:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:36:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:36:34,966 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 4 states. [2018-12-01 22:36:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,058 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2018-12-01 22:36:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:36:35,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-01 22:36:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,059 INFO L225 Difference]: With dead ends: 70 [2018-12-01 22:36:35,059 INFO L226 Difference]: Without dead ends: 70 [2018-12-01 22:36:35,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:36:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-01 22:36:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2018-12-01 22:36:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-01 22:36:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2018-12-01 22:36:35,063 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 11 [2018-12-01 22:36:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,063 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2018-12-01 22:36:35,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:36:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2018-12-01 22:36:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 22:36:35,064 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,064 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,064 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1319085258, now seen corresponding path program 1 times [2018-12-01 22:36:35,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,065 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 22:36:35,096 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:36:35,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:36:35,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:36:35,097 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 4 states. [2018-12-01 22:36:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,178 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2018-12-01 22:36:35,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:36:35,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-01 22:36:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,180 INFO L225 Difference]: With dead ends: 88 [2018-12-01 22:36:35,180 INFO L226 Difference]: Without dead ends: 88 [2018-12-01 22:36:35,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:36:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-01 22:36:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2018-12-01 22:36:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-01 22:36:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2018-12-01 22:36:35,186 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 11 [2018-12-01 22:36:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,186 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2018-12-01 22:36:35,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:36:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2018-12-01 22:36:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 22:36:35,187 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,187 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,187 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1804683774, now seen corresponding path program 1 times [2018-12-01 22:36:35,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,188 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 22:36:35,237 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:35,238 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 6 states. [2018-12-01 22:36:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,340 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2018-12-01 22:36:35,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:36:35,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-01 22:36:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,341 INFO L225 Difference]: With dead ends: 112 [2018-12-01 22:36:35,342 INFO L226 Difference]: Without dead ends: 112 [2018-12-01 22:36:35,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-12-01 22:36:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-12-01 22:36:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2018-12-01 22:36:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-01 22:36:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2018-12-01 22:36:35,347 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 19 [2018-12-01 22:36:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,347 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2018-12-01 22:36:35,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2018-12-01 22:36:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 22:36:35,348 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,348 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,348 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -540844760, now seen corresponding path program 1 times [2018-12-01 22:36:35,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,349 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,400 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:35,400 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:35,401 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 6 states. [2018-12-01 22:36:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,548 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2018-12-01 22:36:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:36:35,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-01 22:36:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,549 INFO L225 Difference]: With dead ends: 105 [2018-12-01 22:36:35,549 INFO L226 Difference]: Without dead ends: 105 [2018-12-01 22:36:35,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-01 22:36:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-01 22:36:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2018-12-01 22:36:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-01 22:36:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2018-12-01 22:36:35,553 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 19 [2018-12-01 22:36:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,553 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2018-12-01 22:36:35,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2018-12-01 22:36:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 22:36:35,553 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,553 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,554 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash -540844759, now seen corresponding path program 1 times [2018-12-01 22:36:35,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,555 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:35,621 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:35,622 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 6 states. [2018-12-01 22:36:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,794 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-12-01 22:36:35,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 22:36:35,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-01 22:36:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,795 INFO L225 Difference]: With dead ends: 106 [2018-12-01 22:36:35,795 INFO L226 Difference]: Without dead ends: 106 [2018-12-01 22:36:35,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 22:36:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-01 22:36:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2018-12-01 22:36:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-01 22:36:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2018-12-01 22:36:35,798 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 19 [2018-12-01 22:36:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,798 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2018-12-01 22:36:35,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2018-12-01 22:36:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-01 22:36:35,799 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,799 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash 818102511, now seen corresponding path program 1 times [2018-12-01 22:36:35,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,800 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 22:36:35,830 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:35,830 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 6 states. [2018-12-01 22:36:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:35,925 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2018-12-01 22:36:35,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 22:36:35,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-01 22:36:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:35,926 INFO L225 Difference]: With dead ends: 101 [2018-12-01 22:36:35,926 INFO L226 Difference]: Without dead ends: 101 [2018-12-01 22:36:35,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-12-01 22:36:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-12-01 22:36:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2018-12-01 22:36:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-01 22:36:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2018-12-01 22:36:35,929 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 21 [2018-12-01 22:36:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:35,929 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2018-12-01 22:36:35,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2018-12-01 22:36:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-01 22:36:35,930 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:35,930 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:35,930 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:35,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:35,930 INFO L82 PathProgramCache]: Analyzing trace with hash 522288282, now seen corresponding path program 1 times [2018-12-01 22:36:35,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:35,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:35,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:35,931 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:35,960 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:35,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:35,960 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:35,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:35,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:35,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:35,960 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 6 states. [2018-12-01 22:36:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:36,054 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-12-01 22:36:36,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:36:36,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-01 22:36:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:36,055 INFO L225 Difference]: With dead ends: 86 [2018-12-01 22:36:36,055 INFO L226 Difference]: Without dead ends: 86 [2018-12-01 22:36:36,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-01 22:36:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-01 22:36:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2018-12-01 22:36:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-01 22:36:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2018-12-01 22:36:36,057 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 21 [2018-12-01 22:36:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:36,058 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2018-12-01 22:36:36,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2018-12-01 22:36:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-01 22:36:36,058 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:36,058 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:36,058 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:36,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash 522288283, now seen corresponding path program 1 times [2018-12-01 22:36:36,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:36,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:36,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:36,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:36,059 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:36,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:36,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:36,114 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-01 22:36:36,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:36,115 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 6 states. [2018-12-01 22:36:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:36,242 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2018-12-01 22:36:36,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 22:36:36,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-01 22:36:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:36,242 INFO L225 Difference]: With dead ends: 83 [2018-12-01 22:36:36,242 INFO L226 Difference]: Without dead ends: 83 [2018-12-01 22:36:36,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 22:36:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-01 22:36:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2018-12-01 22:36:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-01 22:36:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2018-12-01 22:36:36,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 21 [2018-12-01 22:36:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:36,253 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2018-12-01 22:36:36,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2018-12-01 22:36:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-01 22:36:36,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:36,254 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:36,254 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION]=== [2018-12-01 22:36:36,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash -410251038, now seen corresponding path program 1 times [2018-12-01 22:36:36,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-01 22:36:36,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:36,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:36,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 22:36:36,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-01 22:36:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:36:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:36:36,282 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 22:36:36,290 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-01 22:36:36,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 10:36:36 BoogieIcfgContainer [2018-12-01 22:36:36,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 22:36:36,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 22:36:36,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 22:36:36,301 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 22:36:36,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:34" (3/4) ... [2018-12-01 22:36:36,304 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-01 22:36:36,304 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 22:36:36,304 INFO L168 Benchmark]: Toolchain (without parser) took 2135.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 951.3 MB in the beginning and 1.2 GB in the end (delta: -205.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,305 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.0 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -105.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:36,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,306 INFO L168 Benchmark]: Boogie Preprocessor took 19.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,306 INFO L168 Benchmark]: RCFGBuilder took 234.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:36,306 INFO L168 Benchmark]: TraceAbstraction took 1560.44 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 93.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -132.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,307 INFO L168 Benchmark]: Witness Printer took 3.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:36,308 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 292.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.0 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -105.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 234.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1560.44 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 93.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -132.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 3.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List a = (List) malloc(sizeof(struct node)); VAL [a={11:0}, malloc(sizeof(struct node))={11:0}] [L628] COND FALSE !(a == 0) VAL [a={11:0}, malloc(sizeof(struct node))={11:0}] [L629] List t; [L630] List p = a; VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}] [L631] COND FALSE !(__VERIFIER_nondet_int()) [L638] COND FALSE !(__VERIFIER_nondet_int()) [L645] p->h = 3 VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}] [L646] p = a VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}] [L647] EXPR p->h VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}, p->h=3] [L647] COND FALSE !(p->h == 1) [L649] EXPR p->h VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}, p->h=3] [L649] COND FALSE !(p->h == 2) [L651] EXPR p->h VAL [a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}, p->h=3] [L651] COND FALSE !(p->h != 3) [L653] return 0; VAL [\result=0, a={11:0}, malloc(sizeof(struct node))={11:0}, p={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 25 error locations. UNSAFE Result, 1.5s OverallTime, 10 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 417 SDtfs, 587 SDslu, 751 SDs, 0 SdLazy, 999 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 146 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 8860 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-01 22:36:37,650 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 22:36:37,651 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 22:36:37,657 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 22:36:37,657 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 22:36:37,658 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 22:36:37,658 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 22:36:37,659 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 22:36:37,660 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 22:36:37,660 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 22:36:37,660 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 22:36:37,661 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 22:36:37,661 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 22:36:37,662 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 22:36:37,662 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 22:36:37,662 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 22:36:37,663 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 22:36:37,664 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 22:36:37,664 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 22:36:37,665 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 22:36:37,666 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 22:36:37,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 22:36:37,667 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 22:36:37,667 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 22:36:37,668 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 22:36:37,668 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 22:36:37,668 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 22:36:37,669 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 22:36:37,669 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 22:36:37,670 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 22:36:37,670 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 22:36:37,670 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 22:36:37,670 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 22:36:37,670 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 22:36:37,671 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 22:36:37,671 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 22:36:37,671 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-01 22:36:37,679 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 22:36:37,679 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 22:36:37,680 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-01 22:36:37,680 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-01 22:36:37,680 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-01 22:36:37,681 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 22:36:37,681 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-01 22:36:37,681 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 22:36:37,682 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 22:36:37,682 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 22:36:37,683 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-01 22:36:37,683 INFO L133 SettingsManager]: * Logic for external solver=AUFBV 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_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan 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 -> Taipan 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 -> 45292d949331e02d780a7679ac12098a89a953bb [2018-12-01 22:36:37,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 22:36:37,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 22:36:37,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 22:36:37,715 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 22:36:37,715 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 22:36:37,716 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:37,759 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/7caae0384/ec40dca405cb49bab01be0cfe832613b/FLAGfa00a5ae5 [2018-12-01 22:36:38,214 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 22:36:38,215 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/sv-benchmarks/c/list-properties/list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:38,221 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/7caae0384/ec40dca405cb49bab01be0cfe832613b/FLAGfa00a5ae5 [2018-12-01 22:36:38,229 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/data/7caae0384/ec40dca405cb49bab01be0cfe832613b [2018-12-01 22:36:38,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 22:36:38,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 22:36:38,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 22:36:38,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 22:36:38,234 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 22:36:38,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5554d819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38, skipping insertion in model container [2018-12-01 22:36:38,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 22:36:38,258 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 22:36:38,406 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:36:38,414 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 22:36:38,439 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 22:36:38,508 INFO L195 MainTranslator]: Completed translation [2018-12-01 22:36:38,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38 WrapperNode [2018-12-01 22:36:38,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 22:36:38,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 22:36:38,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 22:36:38,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 22:36:38,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 22:36:38,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 22:36:38,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 22:36:38,528 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 22:36:38,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... [2018-12-01 22:36:38,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 22:36:38,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 22:36:38,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 22:36:38,547 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 22:36:38,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/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 [2018-12-01 22:36:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-01 22:36:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 22:36:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 22:36:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-01 22:36:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 22:36:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 22:36:38,828 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 22:36:38,828 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 22:36:38,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:38 BoogieIcfgContainer [2018-12-01 22:36:38,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 22:36:38,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 22:36:38,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 22:36:38,831 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 22:36:38,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 10:36:38" (1/3) ... [2018-12-01 22:36:38,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8f7319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:36:38, skipping insertion in model container [2018-12-01 22:36:38,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:36:38" (2/3) ... [2018-12-01 22:36:38,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8f7319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:36:38, skipping insertion in model container [2018-12-01 22:36:38,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:38" (3/3) ... [2018-12-01 22:36:38,833 INFO L112 eAbstractionObserver]: Analyzing ICFG list_true-unreach-call_false-valid-memtrack.i [2018-12-01 22:36:38,838 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 22:36:38,844 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2018-12-01 22:36:38,855 INFO L257 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2018-12-01 22:36:38,868 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 22:36:38,869 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 22:36:38,869 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-01 22:36:38,869 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 22:36:38,869 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 22:36:38,869 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 22:36:38,869 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 22:36:38,869 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 22:36:38,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 22:36:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-12-01 22:36:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-01 22:36:38,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:38,883 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:38,884 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:38,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2120440968, now seen corresponding path program 1 times [2018-12-01 22:36:38,889 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:38,890 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:38,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:38,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:38,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-01 22:36:38,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:38,968 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:38,968 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-01 22:36:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:38,979 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:38,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:38,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 22:36:38,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:36:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:36:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:36:38,994 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2018-12-01 22:36:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:39,181 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-12-01 22:36:39,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:36:39,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-12-01 22:36:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:39,188 INFO L225 Difference]: With dead ends: 75 [2018-12-01 22:36:39,188 INFO L226 Difference]: Without dead ends: 66 [2018-12-01 22:36:39,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:36:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-01 22:36:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2018-12-01 22:36:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-01 22:36:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2018-12-01 22:36:39,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 10 [2018-12-01 22:36:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:39,215 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2018-12-01 22:36:39,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:36:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2018-12-01 22:36:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-01 22:36:39,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:39,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:39,217 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:39,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2120440969, now seen corresponding path program 1 times [2018-12-01 22:36:39,217 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:39,217 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:39,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:39,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:39,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-01 22:36:39,257 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,261 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-01 22:36:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:39,274 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:39,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:39,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-01 22:36:39,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 22:36:39,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 22:36:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-01 22:36:39,277 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 4 states. [2018-12-01 22:36:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:39,486 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2018-12-01 22:36:39,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 22:36:39,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-12-01 22:36:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:39,487 INFO L225 Difference]: With dead ends: 84 [2018-12-01 22:36:39,487 INFO L226 Difference]: Without dead ends: 84 [2018-12-01 22:36:39,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-01 22:36:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-01 22:36:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2018-12-01 22:36:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-01 22:36:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2018-12-01 22:36:39,494 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 10 [2018-12-01 22:36:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:39,494 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2018-12-01 22:36:39,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 22:36:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2018-12-01 22:36:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-01 22:36:39,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:39,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:39,496 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:39,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash -508055769, now seen corresponding path program 1 times [2018-12-01 22:36:39,497 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:39,497 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:39,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:39,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:39,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-01 22:36:39,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 22:36:39,578 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,580 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,584 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-12-01 22:36:39,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-12-01 22:36:39,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-12-01 22:36:39,614 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,624 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,625 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:39,626 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2018-12-01 22:36:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:39,639 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:39,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:39,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-01 22:36:39,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 22:36:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 22:36:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-01 22:36:39,641 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 7 states. [2018-12-01 22:36:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:39,941 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2018-12-01 22:36:39,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 22:36:39,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-12-01 22:36:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:39,942 INFO L225 Difference]: With dead ends: 108 [2018-12-01 22:36:39,942 INFO L226 Difference]: Without dead ends: 108 [2018-12-01 22:36:39,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-01 22:36:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-01 22:36:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2018-12-01 22:36:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-01 22:36:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2018-12-01 22:36:39,946 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 17 [2018-12-01 22:36:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:39,946 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2018-12-01 22:36:39,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 22:36:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2018-12-01 22:36:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-01 22:36:39,947 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:39,947 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:39,947 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:39,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2035917311, now seen corresponding path program 1 times [2018-12-01 22:36:39,948 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:39,948 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:39,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:39,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:39,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-12-01 22:36:39,998 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-12-01 22:36:40,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:40,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:40,016 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,018 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,028 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2018-12-01 22:36:40,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-01 22:36:40,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2018-12-01 22:36:40,047 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,048 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-01 22:36:40,054 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2018-12-01 22:36:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:40,066 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:40,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:40,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:40,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:40,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:40,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:40,068 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 6 states. [2018-12-01 22:36:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:40,344 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-12-01 22:36:40,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 22:36:40,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-01 22:36:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:40,346 INFO L225 Difference]: With dead ends: 85 [2018-12-01 22:36:40,346 INFO L226 Difference]: Without dead ends: 85 [2018-12-01 22:36:40,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-01 22:36:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-01 22:36:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2018-12-01 22:36:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-01 22:36:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2018-12-01 22:36:40,349 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 17 [2018-12-01 22:36:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:40,349 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2018-12-01 22:36:40,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2018-12-01 22:36:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-01 22:36:40,350 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:40,350 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:40,350 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:40,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2035917312, now seen corresponding path program 1 times [2018-12-01 22:36:40,351 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:40,351 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:40,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:40,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:40,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-01 22:36:40,402 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,406 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,406 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-01 22:36:40,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:40,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:40,424 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,429 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:40,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:40,449 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,452 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,461 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,461 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2018-12-01 22:36:40,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-12-01 22:36:40,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2018-12-01 22:36:40,481 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,484 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-12-01 22:36:40,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2018-12-01 22:36:40,497 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,499 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:40,503 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2018-12-01 22:36:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:40,526 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:40,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:40,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:40,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:40,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:40,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:40,528 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 6 states. [2018-12-01 22:36:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:41,025 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2018-12-01 22:36:41,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 22:36:41,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-01 22:36:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:41,027 INFO L225 Difference]: With dead ends: 101 [2018-12-01 22:36:41,027 INFO L226 Difference]: Without dead ends: 101 [2018-12-01 22:36:41,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 22:36:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-12-01 22:36:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2018-12-01 22:36:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-01 22:36:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2018-12-01 22:36:41,031 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 17 [2018-12-01 22:36:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:41,032 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2018-12-01 22:36:41,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2018-12-01 22:36:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-01 22:36:41,032 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:41,033 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:41,033 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:41,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2111799943, now seen corresponding path program 1 times [2018-12-01 22:36:41,033 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:41,034 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:41,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:41,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:41,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-01 22:36:41,085 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,088 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-01 22:36:41,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:41,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:41,106 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,110 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:41,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:41,134 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,137 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,149 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2018-12-01 22:36:41,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-12-01 22:36:41,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2018-12-01 22:36:41,166 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,168 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-12-01 22:36:41,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2018-12-01 22:36:41,181 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,182 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,186 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2018-12-01 22:36:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:41,206 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:41,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:41,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:41,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:41,209 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 6 states. [2018-12-01 22:36:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:41,763 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-12-01 22:36:41,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 22:36:41,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-01 22:36:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:41,766 INFO L225 Difference]: With dead ends: 90 [2018-12-01 22:36:41,766 INFO L226 Difference]: Without dead ends: 90 [2018-12-01 22:36:41,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 22:36:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-01 22:36:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2018-12-01 22:36:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-01 22:36:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2018-12-01 22:36:41,773 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 18 [2018-12-01 22:36:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:41,773 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2018-12-01 22:36:41,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2018-12-01 22:36:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-01 22:36:41,774 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:41,774 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:41,775 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:41,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2111799942, now seen corresponding path program 1 times [2018-12-01 22:36:41,775 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:41,775 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:41,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:41,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:41,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-12-01 22:36:41,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,863 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,863 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-12-01 22:36:41,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-12-01 22:36:41,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-12-01 22:36:41,875 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,878 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,885 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,885 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2018-12-01 22:36:41,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2018-12-01 22:36:41,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2018-12-01 22:36:41,904 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,905 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:41,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-01 22:36:41,915 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2018-12-01 22:36:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:41,924 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:41,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:41,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 22:36:41,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 22:36:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 22:36:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 22:36:41,927 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 6 states. [2018-12-01 22:36:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:42,212 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2018-12-01 22:36:42,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 22:36:42,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-01 22:36:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:42,214 INFO L225 Difference]: With dead ends: 64 [2018-12-01 22:36:42,214 INFO L226 Difference]: Without dead ends: 64 [2018-12-01 22:36:42,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-01 22:36:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-01 22:36:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2018-12-01 22:36:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-01 22:36:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2018-12-01 22:36:42,218 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 18 [2018-12-01 22:36:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:42,218 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2018-12-01 22:36:42,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 22:36:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2018-12-01 22:36:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 22:36:42,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:42,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:42,219 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:42,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1337099412, now seen corresponding path program 1 times [2018-12-01 22:36:42,220 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:42,220 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:42,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 22:36:42,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 22:36:42,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-01 22:36:42,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 22:36:42,296 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,297 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,301 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-12-01 22:36:42,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-12-01 22:36:42,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-12-01 22:36:42,317 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,318 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 22:36:42,319 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2018-12-01 22:36:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 22:36:42,329 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-01 22:36:42,330 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 22:36:42,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-01 22:36:42,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 22:36:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 22:36:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-01 22:36:42,331 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 7 states. [2018-12-01 22:36:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 22:36:42,587 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-12-01 22:36:42,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 22:36:42,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-12-01 22:36:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 22:36:42,588 INFO L225 Difference]: With dead ends: 83 [2018-12-01 22:36:42,588 INFO L226 Difference]: Without dead ends: 83 [2018-12-01 22:36:42,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-01 22:36:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-01 22:36:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2018-12-01 22:36:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-01 22:36:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-12-01 22:36:42,591 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 19 [2018-12-01 22:36:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 22:36:42,591 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-12-01 22:36:42,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 22:36:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-12-01 22:36:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-01 22:36:42,592 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 22:36:42,592 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 22:36:42,592 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr17REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION]=== [2018-12-01 22:36:42,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 22:36:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1501216293, now seen corresponding path program 1 times [2018-12-01 22:36:42,592 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-01 22:36:42,592 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b69ee98-0762-4030-9afe-c24a6476dfa8/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-01 22:36:42,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 22:36:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:36:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 22:36:42,688 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 22:36:42,696 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-12-01 22:36:42,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 10:36:42 BoogieIcfgContainer [2018-12-01 22:36:42,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 22:36:42,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 22:36:42,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 22:36:42,706 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 22:36:42,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:36:38" (3/4) ... [2018-12-01 22:36:42,708 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-01 22:36:42,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 22:36:42,709 INFO L168 Benchmark]: Toolchain (without parser) took 4477.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -146.4 MB). Peak memory consumption was 69.1 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,710 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:42,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -207.8 MB). Peak memory consumption was 43.3 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,711 INFO L168 Benchmark]: Boogie Preprocessor took 18.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 22:36:42,711 INFO L168 Benchmark]: RCFGBuilder took 281.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,711 INFO L168 Benchmark]: TraceAbstraction took 3876.46 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,712 INFO L168 Benchmark]: Witness Printer took 2.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2018-12-01 22:36:42,713 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -207.8 MB). Peak memory consumption was 43.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 281.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3876.46 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L628] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L629] List t; [L630] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L631] COND FALSE !(__VERIFIER_nondet_int()) [L638] COND FALSE !(__VERIFIER_nondet_int()) [L645] p->h = 3 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L646] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L647] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L647] COND FALSE !(p->h == 1) [L649] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L649] COND FALSE !(p->h == 2) [L651] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L651] COND FALSE !(p->h != 3) [L653] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 72 locations, 25 error locations. UNSAFE Result, 3.8s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 310 SDtfs, 656 SDslu, 602 SDs, 0 SdLazy, 957 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=4, 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, 8 MinimizatonAttempts, 135 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 8828 SizeOfPredicates, 50 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...