./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 566f1414dafe692faf7ed7456be2d3e7d288640b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 07:12:44,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:12:44,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:12:44,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:12:44,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:12:44,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:12:44,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:12:44,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:12:44,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:12:44,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:12:44,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:12:44,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:12:44,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:12:44,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:12:44,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:12:44,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:12:44,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:12:44,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:12:44,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:12:44,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:12:44,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:12:44,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:12:44,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:12:44,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:12:44,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:12:44,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:12:44,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:12:44,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:12:44,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:12:44,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:12:44,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:12:44,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:12:44,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:12:44,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:12:44,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:12:44,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:12:44,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:12:44,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:12:44,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:12:44,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:12:44,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:12:44,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 07:12:44,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:12:44,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:12:44,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:12:44,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:12:44,172 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:12:44,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:12:44,173 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 07:12:44,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 07:12:44,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:12:44,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 07:12:44,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:12:44,174 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 07:12:44,174 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 07:12:44,174 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 07:12:44,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 07:12:44,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 07:12:44,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 07:12:44,175 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 07:12:44,175 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:12:44,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:12:44,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:12:44,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 07:12:44,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 07:12:44,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:12:44,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:12:44,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 07:12:44,177 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 07:12:44,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 07:12:44,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 07:12:44,178 INFO L138 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/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566f1414dafe692faf7ed7456be2d3e7d288640b [2019-11-20 07:12:44,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:12:44,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:12:44,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:12:44,388 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:12:44,390 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:12:44,391 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/memset.c [2019-11-20 07:12:44,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/data/4f5dfa59c/3b218eaada0042c68c5b05367e4fc8a8/FLAG44780eaf2 [2019-11-20 07:12:44,837 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:12:44,838 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/sv-benchmarks/c/ldv-memsafety/memset.c [2019-11-20 07:12:44,843 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/data/4f5dfa59c/3b218eaada0042c68c5b05367e4fc8a8/FLAG44780eaf2 [2019-11-20 07:12:44,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/data/4f5dfa59c/3b218eaada0042c68c5b05367e4fc8a8 [2019-11-20 07:12:44,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:12:44,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 07:12:44,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:12:44,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:12:44,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:12:44,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:12:44" (1/1) ... [2019-11-20 07:12:44,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48314b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:44, skipping insertion in model container [2019-11-20 07:12:44,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:12:44" (1/1) ... [2019-11-20 07:12:44,873 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:12:44,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:12:45,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:12:45,191 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:12:45,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:12:45,234 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:12:45,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45 WrapperNode [2019-11-20 07:12:45,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:12:45,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:12:45,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:12:45,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:12:45,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... [2019-11-20 07:12:45,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:12:45,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:12:45,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:12:45,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:12:45,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:12:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 07:12:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:12:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 07:12:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-20 07:12:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-20 07:12:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 07:12:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 07:12:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-20 07:12:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 07:12:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 07:12:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:12:45,437 WARN L736 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-20 07:12:45,509 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:12:45,509 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-20 07:12:45,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:12:45 BoogieIcfgContainer [2019-11-20 07:12:45,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:12:45,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 07:12:45,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 07:12:45,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 07:12:45,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:12:44" (1/3) ... [2019-11-20 07:12:45,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09213b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:12:45, skipping insertion in model container [2019-11-20 07:12:45,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:12:45" (2/3) ... [2019-11-20 07:12:45,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09213b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:12:45, skipping insertion in model container [2019-11-20 07:12:45,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:12:45" (3/3) ... [2019-11-20 07:12:45,520 INFO L109 eAbstractionObserver]: Analyzing ICFG memset.c [2019-11-20 07:12:45,529 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 07:12:45,554 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-20 07:12:45,566 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-20 07:12:45,614 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 07:12:45,615 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 07:12:45,615 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 07:12:45,615 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:12:45,615 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:12:45,615 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 07:12:45,615 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:12:45,616 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 07:12:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-20 07:12:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 07:12:45,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:45,653 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:45,665 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 07:12:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2019-11-20 07:12:45,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:12:45,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [548675809] [2019-11-20 07:12:45,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/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 [2019-11-20 07:12:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:12:45,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 07:12:45,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:45,890 INFO L377 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 [2019-11-20 07:12:45,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:45,900 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:45,900 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:45,901 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:12:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:45,916 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:12:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:45,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [548675809] [2019-11-20 07:12:45,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:12:45,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 07:12:45,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838247016] [2019-11-20 07:12:45,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 07:12:45,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:12:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 07:12:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 07:12:45,951 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-20 07:12:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:45,992 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-20 07:12:45,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 07:12:45,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-20 07:12:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:46,001 INFO L225 Difference]: With dead ends: 19 [2019-11-20 07:12:46,002 INFO L226 Difference]: Without dead ends: 16 [2019-11-20 07:12:46,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 07:12:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-20 07:12:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-20 07:12:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 07:12:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-20 07:12:46,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2019-11-20 07:12:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:46,036 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-20 07:12:46,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 07:12:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-20 07:12:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 07:12:46,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:46,037 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:46,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:12:46,241 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 07:12:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2019-11-20 07:12:46,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:12:46,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [419363141] [2019-11-20 07:12:46,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/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 [2019-11-20 07:12:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:12:46,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 07:12:46,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:46,320 INFO L377 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 [2019-11-20 07:12:46,321 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:46,327 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:46,328 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:46,328 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 07:12:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:46,338 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:12:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:46,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419363141] [2019-11-20 07:12:46,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:12:46,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 07:12:46,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757087386] [2019-11-20 07:12:46,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 07:12:46,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:12:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 07:12:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:12:46,390 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2019-11-20 07:12:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:46,433 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-20 07:12:46,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 07:12:46,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-20 07:12:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:46,435 INFO L225 Difference]: With dead ends: 15 [2019-11-20 07:12:46,435 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 07:12:46,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:12:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 07:12:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-20 07:12:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 07:12:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-20 07:12:46,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2019-11-20 07:12:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:46,439 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-20 07:12:46,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 07:12:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-20 07:12:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 07:12:46,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:46,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:46,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:12:46,644 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 07:12:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2019-11-20 07:12:46,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:12:46,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [811512502] [2019-11-20 07:12:46,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/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 [2019-11-20 07:12:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:12:46,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 07:12:46,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:46,755 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:12:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:46,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [811512502] [2019-11-20 07:12:46,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:12:46,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 07:12:46,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842129002] [2019-11-20 07:12:46,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 07:12:46,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:12:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 07:12:46,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 07:12:46,819 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-11-20 07:12:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:46,871 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-20 07:12:46,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:12:46,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 07:12:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:46,873 INFO L225 Difference]: With dead ends: 21 [2019-11-20 07:12:46,873 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 07:12:46,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 07:12:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 07:12:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 07:12:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 07:12:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-20 07:12:46,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-20 07:12:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:46,878 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-20 07:12:46,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 07:12:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-20 07:12:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 07:12:46,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:46,879 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:47,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:12:47,087 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 07:12:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 1 times [2019-11-20 07:12:47,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:12:47,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1337488098] [2019-11-20 07:12:47,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/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 [2019-11-20 07:12:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:12:47,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 07:12:47,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:47,207 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:12:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:12:47,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337488098] [2019-11-20 07:12:47,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:12:47,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 07:12:47,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059510262] [2019-11-20 07:12:47,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:12:47,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:12:47,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:12:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:12:47,332 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-11-20 07:12:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:47,570 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-20 07:12:47,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 07:12:47,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 07:12:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:47,572 INFO L225 Difference]: With dead ends: 25 [2019-11-20 07:12:47,573 INFO L226 Difference]: Without dead ends: 21 [2019-11-20 07:12:47,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-20 07:12:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-20 07:12:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-20 07:12:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 07:12:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-20 07:12:47,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2019-11-20 07:12:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:47,577 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-20 07:12:47,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:12:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-20 07:12:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 07:12:47,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:12:47,579 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:12:47,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:12:47,779 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 07:12:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:12:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 351566393, now seen corresponding path program 2 times [2019-11-20 07:12:47,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:12:47,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [692047337] [2019-11-20 07:12:47,780 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/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 [2019-11-20 07:12:47,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 07:12:47,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 07:12:47,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:12:47,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:12:47,864 INFO L377 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 [2019-11-20 07:12:47,864 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:47,866 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:47,866 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:12:47,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:12:47,939 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:12:47,940 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-20 07:12:47,941 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:12:47,960 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 07:12:47,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:47,964 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 07:12:47,964 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-20 07:12:47,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:47,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:47,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:12:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 07:12:48,171 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:12:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 07:12:50,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692047337] [2019-11-20 07:12:50,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:12:50,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-20 07:12:50,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548789507] [2019-11-20 07:12:50,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 07:12:50,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:12:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 07:12:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2019-11-20 07:12:50,270 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 9 states. [2019-11-20 07:12:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:12:50,429 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-20 07:12:50,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 07:12:50,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-20 07:12:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:12:50,430 INFO L225 Difference]: With dead ends: 20 [2019-11-20 07:12:50,430 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 07:12:50,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2019-11-20 07:12:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 07:12:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 07:12:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 07:12:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 07:12:50,432 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-11-20 07:12:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:12:50,432 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 07:12:50,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 07:12:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 07:12:50,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 07:12:50,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:12:50,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:12:50 BoogieIcfgContainer [2019-11-20 07:12:50,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 07:12:50,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 07:12:50,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 07:12:50,638 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 07:12:50,638 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:12:45" (3/4) ... [2019-11-20 07:12:50,641 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 07:12:50,648 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-20 07:12:50,648 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2019-11-20 07:12:50,649 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-20 07:12:50,653 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-20 07:12:50,653 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 07:12:50,653 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 07:12:50,654 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 07:12:50,687 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee43e079-c5b8-4064-a3d3-513a577d0301/bin/uautomizer/witness.graphml [2019-11-20 07:12:50,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 07:12:50,688 INFO L168 Benchmark]: Toolchain (without parser) took 5831.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 957.9 MB in the end (delta: -11.8 MB). Peak memory consumption was 139.7 MB. Max. memory is 11.5 GB. [2019-11-20 07:12:50,689 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:12:50,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -200.2 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:12:50,689 INFO L168 Benchmark]: Boogie Preprocessor took 40.24 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. [2019-11-20 07:12:50,690 INFO L168 Benchmark]: RCFGBuilder took 235.61 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:12:50,690 INFO L168 Benchmark]: TraceAbstraction took 5124.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.3 MB in the end (delta: 164.8 MB). Peak memory consumption was 164.8 MB. Max. memory is 11.5 GB. [2019-11-20 07:12:50,691 INFO L168 Benchmark]: Witness Printer took 49.82 ms. Allocated memory is still 1.2 GB. Free memory was 963.3 MB in the beginning and 957.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:12:50,693 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 378.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -200.2 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.24 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 235.61 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5124.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.3 MB in the end (delta: 164.8 MB). Peak memory consumption was 164.8 MB. Max. memory is 11.5 GB. * Witness Printer took 49.82 ms. Allocated memory is still 1.2 GB. Free memory was 963.3 MB in the beginning and 957.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. Result: SAFE, OverallTime: 5.0s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 27 SDslu, 116 SDs, 0 SdLazy, 94 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 64 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 118 ConstructedInterpolants, 12 QuantifiedInterpolants, 7820 SizeOfPredicates, 3 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 42/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...