./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe_false-valid-deref.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_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/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 3d5e76e59f87104cc83de8acda77b849da7d1b09 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 18:44:40,354 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 18:44:40,355 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 18:44:40,361 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 18:44:40,361 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 18:44:40,361 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 18:44:40,362 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 18:44:40,363 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 18:44:40,364 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 18:44:40,364 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 18:44:40,364 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 18:44:40,365 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 18:44:40,365 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 18:44:40,365 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 18:44:40,366 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 18:44:40,366 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 18:44:40,367 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 18:44:40,368 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 18:44:40,368 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 18:44:40,369 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 18:44:40,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 18:44:40,370 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 18:44:40,371 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 18:44:40,371 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 18:44:40,372 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 18:44:40,372 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 18:44:40,372 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 18:44:40,373 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 18:44:40,373 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 18:44:40,374 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 18:44:40,374 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 18:44:40,374 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 18:44:40,374 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 18:44:40,374 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 18:44:40,375 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 18:44:40,375 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 18:44:40,375 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 18:44:40,382 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 18:44:40,383 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 18:44:40,383 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 18:44:40,383 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 18:44:40,383 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 18:44:40,383 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 18:44:40,384 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 18:44:40,384 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 18:44:40,385 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 18:44:40,385 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 18:44:40,386 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 18:44:40,386 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 18:44:40,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 18:44:40,387 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_7e15fbaf-041a-48d1-adcb-83280ca00863/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 -> 3d5e76e59f87104cc83de8acda77b849da7d1b09 [2018-12-02 18:44:40,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 18:44:40,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 18:44:40,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 18:44:40,415 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 18:44:40,415 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 18:44:40,416 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe_false-valid-deref.i [2018-12-02 18:44:40,452 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/data/fde5ae49a/c289f258c537475a80bfc20c450ee1eb/FLAGee5fcd3ba [2018-12-02 18:44:40,896 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 18:44:40,896 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe_false-valid-deref.i [2018-12-02 18:44:40,902 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/data/fde5ae49a/c289f258c537475a80bfc20c450ee1eb/FLAGee5fcd3ba [2018-12-02 18:44:40,910 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/data/fde5ae49a/c289f258c537475a80bfc20c450ee1eb [2018-12-02 18:44:40,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 18:44:40,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 18:44:40,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 18:44:40,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 18:44:40,916 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 18:44:40,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:44:40" (1/1) ... [2018-12-02 18:44:40,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f79a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:40, skipping insertion in model container [2018-12-02 18:44:40,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:44:40" (1/1) ... [2018-12-02 18:44:40,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 18:44:40,946 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 18:44:41,112 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 18:44:41,118 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 18:44:41,182 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 18:44:41,210 INFO L195 MainTranslator]: Completed translation [2018-12-02 18:44:41,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41 WrapperNode [2018-12-02 18:44:41,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 18:44:41,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 18:44:41,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 18:44:41,211 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 18:44:41,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 18:44:41,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 18:44:41,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 18:44:41,228 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 18:44:41,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... [2018-12-02 18:44:41,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 18:44:41,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 18:44:41,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 18:44:41,244 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 18:44:41,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/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 [2018-12-02 18:44:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-12-02 18:44:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 18:44:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2018-12-02 18:44:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 18:44:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 18:44:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 18:44:41,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 18:44:41,437 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 18:44:41,438 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 18:44:41,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:44:41 BoogieIcfgContainer [2018-12-02 18:44:41,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 18:44:41,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 18:44:41,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 18:44:41,440 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 18:44:41,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:44:40" (1/3) ... [2018-12-02 18:44:41,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:44:41, skipping insertion in model container [2018-12-02 18:44:41,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:44:41" (2/3) ... [2018-12-02 18:44:41,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:44:41, skipping insertion in model container [2018-12-02 18:44:41,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:44:41" (3/3) ... [2018-12-02 18:44:41,442 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe_false-valid-deref.i [2018-12-02 18:44:41,448 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 18:44:41,452 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2018-12-02 18:44:41,460 INFO L257 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2018-12-02 18:44:41,474 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 18:44:41,475 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 18:44:41,475 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 18:44:41,475 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 18:44:41,475 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 18:44:41,475 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 18:44:41,475 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 18:44:41,475 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 18:44:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-12-02 18:44:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 18:44:41,489 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:41,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:41,491 INFO L423 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:41,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1655047384, now seen corresponding path program 1 times [2018-12-02 18:44:41,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:41,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:41,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:41,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:44:41,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 18:44:41,585 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:44:41,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 18:44:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 18:44:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 18:44:41,597 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2018-12-02 18:44:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:41,643 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2018-12-02 18:44:41,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 18:44:41,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 18:44:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:41,650 INFO L225 Difference]: With dead ends: 62 [2018-12-02 18:44:41,650 INFO L226 Difference]: Without dead ends: 59 [2018-12-02 18:44:41,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 18:44:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-02 18:44:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-02 18:44:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-02 18:44:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2018-12-02 18:44:41,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 10 [2018-12-02 18:44:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:41,675 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2018-12-02 18:44:41,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 18:44:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2018-12-02 18:44:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 18:44:41,675 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:41,675 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:41,676 INFO L423 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:41,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1655047383, now seen corresponding path program 1 times [2018-12-02 18:44:41,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:41,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:41,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:41,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:44:41,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 18:44:41,717 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:44:41,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 18:44:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 18:44:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 18:44:41,718 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 4 states. [2018-12-02 18:44:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:41,730 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-12-02 18:44:41,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 18:44:41,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-12-02 18:44:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:41,731 INFO L225 Difference]: With dead ends: 58 [2018-12-02 18:44:41,731 INFO L226 Difference]: Without dead ends: 58 [2018-12-02 18:44:41,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-02 18:44:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-02 18:44:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-02 18:44:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-02 18:44:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-12-02 18:44:41,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 10 [2018-12-02 18:44:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:41,736 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-12-02 18:44:41,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 18:44:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-12-02 18:44:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 18:44:41,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:41,736 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:41,737 INFO L423 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:41,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1681423818, now seen corresponding path program 1 times [2018-12-02 18:44:41,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:41,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:41,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:41,738 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:41,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:44:41,875 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:44:41,875 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-02 18:44:41,876 INFO L205 CegarAbsIntRunner]: [0], [3], [7], [8], [11], [12], [13], [14], [15], [20], [75], [77], [93], [94], [95], [97], [98], [99], [100], [101] [2018-12-02 18:44:41,895 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 18:44:41,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 18:44:41,981 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 18:44:41,982 INFO L272 AbstractInterpreter]: Visited 20 different actions 26 times. Never merged. Never widened. Performed 158 root evaluator evaluations with a maximum evaluation depth of 3. Performed 158 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-12-02 18:44:41,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:41,986 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 18:44:41,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:44:41,987 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 18:44:41,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:41,993 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:44:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:42,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:44:44,042 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 [2018-12-02 18:44:44,043 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 18:44:44,046 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 18:44:44,047 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:11 [2018-12-02 18:44:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:44,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:44:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:44,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:44:44,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 15 [2018-12-02 18:44:44,177 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:44:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 18:44:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 18:44:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=182, Unknown=6, NotChecked=0, Total=240 [2018-12-02 18:44:44,178 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 14 states. [2018-12-02 18:44:44,615 WARN L180 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-02 18:44:45,178 WARN L180 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-02 18:44:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:48,384 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2018-12-02 18:44:48,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 18:44:48,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-12-02 18:44:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:48,385 INFO L225 Difference]: With dead ends: 58 [2018-12-02 18:44:48,385 INFO L226 Difference]: Without dead ends: 58 [2018-12-02 18:44:48,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=346, Unknown=6, NotChecked=0, Total=462 [2018-12-02 18:44:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-02 18:44:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2018-12-02 18:44:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 18:44:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-12-02 18:44:48,389 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 26 [2018-12-02 18:44:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:48,390 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-12-02 18:44:48,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 18:44:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-12-02 18:44:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 18:44:48,390 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:48,391 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:48,391 INFO L423 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:48,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1681423819, now seen corresponding path program 1 times [2018-12-02 18:44:48,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:48,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:48,392 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:48,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:44:48,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:44:48,521 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-02 18:44:48,521 INFO L205 CegarAbsIntRunner]: [0], [3], [7], [8], [11], [12], [13], [14], [15], [21], [75], [77], [93], [94], [95], [97], [98], [99], [100], [101] [2018-12-02 18:44:48,522 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 18:44:48,522 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 18:44:48,547 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 18:44:48,547 INFO L272 AbstractInterpreter]: Visited 20 different actions 26 times. Never merged. Never widened. Performed 159 root evaluator evaluations with a maximum evaluation depth of 3. Performed 159 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-12-02 18:44:48,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:48,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 18:44:48,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:44:48,549 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 18:44:48,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:48,555 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:44:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:48,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:44:48,580 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 [2018-12-02 18:44:48,580 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 18:44:48,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 18:44:48,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-12-02 18:44:48,921 WARN L854 $PredicateComparison]: unable to prove that (exists ((build_nondet_String_~nondetString~0.base Int)) (= |c_#length| (store |c_old(#length)| build_nondet_String_~nondetString~0.base 1))) is different from true [2018-12-02 18:44:48,927 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 [2018-12-02 18:44:48,927 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 18:44:48,932 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-02 18:44:48,932 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:17 [2018-12-02 18:44:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2018-12-02 18:44:48,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:44:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:44:49,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:44:49,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2018-12-02 18:44:49,264 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:44:49,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-02 18:44:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-02 18:44:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=892, Unknown=2, NotChecked=60, Total=1056 [2018-12-02 18:44:49,265 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 24 states. [2018-12-02 18:44:49,856 WARN L180 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-12-02 18:44:50,476 WARN L180 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-12-02 18:44:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:51,070 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2018-12-02 18:44:51,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 18:44:51,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2018-12-02 18:44:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:51,072 INFO L225 Difference]: With dead ends: 144 [2018-12-02 18:44:51,072 INFO L226 Difference]: Without dead ends: 144 [2018-12-02 18:44:51,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=1829, Unknown=2, NotChecked=88, Total=2162 [2018-12-02 18:44:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-12-02 18:44:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 57. [2018-12-02 18:44:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-02 18:44:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2018-12-02 18:44:51,077 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 26 [2018-12-02 18:44:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:51,077 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2018-12-02 18:44:51,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-02 18:44:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2018-12-02 18:44:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 18:44:51,077 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:51,077 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:51,078 INFO L423 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:51,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1959701520, now seen corresponding path program 1 times [2018-12-02 18:44:51,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:51,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:51,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,079 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 18:44:51,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:44:51,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-02 18:44:51,136 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:44:51,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 18:44:51,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 18:44:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-02 18:44:51,136 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 9 states. [2018-12-02 18:44:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:51,223 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2018-12-02 18:44:51,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 18:44:51,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-12-02 18:44:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:51,223 INFO L225 Difference]: With dead ends: 57 [2018-12-02 18:44:51,223 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 18:44:51,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-12-02 18:44:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 18:44:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-12-02 18:44:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-02 18:44:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2018-12-02 18:44:51,227 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 30 [2018-12-02 18:44:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:51,227 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2018-12-02 18:44:51,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 18:44:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2018-12-02 18:44:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 18:44:51,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:51,228 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:51,229 INFO L423 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:51,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1959701521, now seen corresponding path program 1 times [2018-12-02 18:44:51,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:51,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:51,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,230 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 18:44:51,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:44:51,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-02 18:44:51,299 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:44:51,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 18:44:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 18:44:51,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-12-02 18:44:51,300 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2018-12-02 18:44:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:51,427 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2018-12-02 18:44:51,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 18:44:51,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-12-02 18:44:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:51,428 INFO L225 Difference]: With dead ends: 112 [2018-12-02 18:44:51,428 INFO L226 Difference]: Without dead ends: 112 [2018-12-02 18:44:51,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-12-02 18:44:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-12-02 18:44:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2018-12-02 18:44:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-02 18:44:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2018-12-02 18:44:51,432 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 30 [2018-12-02 18:44:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:51,433 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2018-12-02 18:44:51,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 18:44:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2018-12-02 18:44:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 18:44:51,433 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:51,433 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:51,434 INFO L423 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:51,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 948584271, now seen corresponding path program 1 times [2018-12-02 18:44:51,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:51,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:51,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,435 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:44:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-02 18:44:51,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:44:51,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-02 18:44:51,500 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:44:51,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 18:44:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 18:44:51,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-12-02 18:44:51,501 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 11 states. [2018-12-02 18:44:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:44:51,612 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2018-12-02 18:44:51,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 18:44:51,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-12-02 18:44:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:44:51,614 INFO L225 Difference]: With dead ends: 114 [2018-12-02 18:44:51,614 INFO L226 Difference]: Without dead ends: 114 [2018-12-02 18:44:51,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-12-02 18:44:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-12-02 18:44:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 60. [2018-12-02 18:44:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-02 18:44:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-12-02 18:44:51,618 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 30 [2018-12-02 18:44:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:44:51,618 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-12-02 18:44:51,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 18:44:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-12-02 18:44:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-02 18:44:51,619 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:44:51,620 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:44:51,620 INFO L423 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrpbrkErr4REQUIRES_VIOLATION, cstrpbrkErr5REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr6REQUIRES_VIOLATION, cstrpbrkErr7REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, cstrpbrkErr8REQUIRES_VIOLATION, cstrpbrkErr9REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2018-12-02 18:44:51,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:44:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash 620649722, now seen corresponding path program 1 times [2018-12-02 18:44:51,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:44:51,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:44:51,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:44:51,621 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:44:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 18:44:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 18:44:51,657 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 18:44:51,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:44:51 BoogieIcfgContainer [2018-12-02 18:44:51,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 18:44:51,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 18:44:51,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 18:44:51,678 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 18:44:51,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:44:41" (3/4) ... [2018-12-02 18:44:51,680 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 18:44:51,711 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7e15fbaf-041a-48d1-adcb-83280ca00863/bin-2019/utaipan/witness.graphml [2018-12-02 18:44:51,711 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 18:44:51,712 INFO L168 Benchmark]: Toolchain (without parser) took 10799.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 948.1 MB in the beginning and 758.8 MB in the end (delta: 189.3 MB). Peak memory consumption was 365.9 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,712 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 18:44:51,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.6 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -126.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,713 INFO L168 Benchmark]: Boogie Preprocessor took 16.39 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. [2018-12-02 18:44:51,714 INFO L168 Benchmark]: RCFGBuilder took 194.01 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: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,714 INFO L168 Benchmark]: TraceAbstraction took 10239.13 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.1 MB). Free memory was 1.0 GB in the beginning and 764.4 MB in the end (delta: 272.6 MB). Peak memory consumption was 361.7 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,714 INFO L168 Benchmark]: Witness Printer took 33.26 ms. Allocated memory is still 1.2 GB. Free memory was 764.4 MB in the beginning and 758.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 11.5 GB. [2018-12-02 18:44:51,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.6 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -126.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.39 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 194.01 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: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10239.13 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.1 MB). Free memory was 1.0 GB in the beginning and 764.4 MB in the end (delta: 272.6 MB). Peak memory consumption was 361.7 MB. Max. memory is 11.5 GB. * Witness Printer took 33.26 ms. Allocated memory is still 1.2 GB. Free memory was 764.4 MB in the beginning and 758.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 567]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L565] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L545] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=1, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L546] nondetString[length-1] = '\0' VAL [length=1, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L547] return nondetString; VAL [\result={5:0}, length=1, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L565] RET, EXPR build_nondet_String() VAL [build_nondet_String()={5:0}] [L565] char* s1 = build_nondet_String(); [L566] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L545] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=1, malloc(length * sizeof(char))={3:0}, nondetString={3:0}] [L546] nondetString[length-1] = '\0' VAL [length=1, malloc(length * sizeof(char))={3:0}, nondetString={3:0}] [L547] return nondetString; VAL [\result={3:0}, length=1, malloc(length * sizeof(char))={3:0}, nondetString={3:0}] [L566] RET, EXPR build_nondet_String() VAL [build_nondet_String()={3:0}, s1={5:0}] [L566] char* s2 = build_nondet_String(); [L567] CALL cstrpbrk(s1,s2) VAL [s1={5:0}, s2={3:0}] [L551] const char *sc1; [L552] const char *s; [L553] int c; [L554] sc1 = s1 VAL [s1={5:0}, s1={5:0}, s2={3:0}, s2={3:0}, sc1={5:0}] [L554] EXPR \read(*sc1) VAL [\read(*sc1)=0, s1={5:0}, s1={5:0}, s2={3:0}, s2={3:0}, sc1={5:0}] [L554] COND FALSE !(*sc1 != '\0') [L562] return 0; VAL [\result={0:0}, s1={5:0}, s1={5:0}, s2={3:0}, s2={3:0}, sc1={5:0}] [L567] RET cstrpbrk(s1,s2) VAL [cstrpbrk(s1,s2)={0:0}, s1={5:0}, s2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 63 locations, 19 error locations. UNSAFE Result, 10.2s OverallTime, 8 OverallIterations, 2 TraceHistogramMax, 6.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 328 SDtfs, 671 SDslu, 1160 SDs, 0 SdLazy, 2079 SolverSat, 67 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 166 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 255 ConstructedInterpolants, 21 QuantifiedInterpolants, 35885 SizeOfPredicates, 20 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 40/63 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...