./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_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_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/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 dbc8724f3e88cc7122b112b08b352efec2eae5a9 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2018-12-09 00:42:56,283 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 00:42:56,283 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 00:42:56,289 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 00:42:56,290 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 00:42:56,290 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 00:42:56,291 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 00:42:56,292 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 00:42:56,292 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 00:42:56,293 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 00:42:56,293 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 00:42:56,293 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 00:42:56,294 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 00:42:56,294 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 00:42:56,295 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 00:42:56,295 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 00:42:56,296 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 00:42:56,297 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 00:42:56,298 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 00:42:56,299 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 00:42:56,299 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 00:42:56,300 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 00:42:56,301 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 00:42:56,301 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 00:42:56,301 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 00:42:56,302 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 00:42:56,302 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 00:42:56,303 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 00:42:56,303 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 00:42:56,304 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 00:42:56,304 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 00:42:56,304 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 00:42:56,304 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 00:42:56,304 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 00:42:56,305 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 00:42:56,305 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 00:42:56,305 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 00:42:56,313 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 00:42:56,313 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 00:42:56,313 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 00:42:56,313 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 00:42:56,313 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 00:42:56,314 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 00:42:56,314 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 00:42:56,315 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 00:42:56,315 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 00:42:56,315 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 00:42:56,316 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 00:42:56,316 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 00:42:56,316 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 00:42:56,317 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 00:42:56,317 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 00:42:56,317 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 00:42:56,317 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_18cc9fc2-fe9a-4481-a339-26d0c1a42896/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 -> dbc8724f3e88cc7122b112b08b352efec2eae5a9 [2018-12-09 00:42:56,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 00:42:56,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 00:42:56,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 00:42:56,344 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 00:42:56,344 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 00:42:56,344 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-12-09 00:42:56,379 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/data/e18d595bf/aa10a72021384d1ab1abb04b8ef6299d/FLAG7eb9eb500 [2018-12-09 00:42:56,754 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 00:42:56,755 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-12-09 00:42:56,761 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/data/e18d595bf/aa10a72021384d1ab1abb04b8ef6299d/FLAG7eb9eb500 [2018-12-09 00:42:57,123 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/data/e18d595bf/aa10a72021384d1ab1abb04b8ef6299d [2018-12-09 00:42:57,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 00:42:57,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 00:42:57,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 00:42:57,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 00:42:57,133 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 00:42:57,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a04c23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57, skipping insertion in model container [2018-12-09 00:42:57,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 00:42:57,161 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 00:42:57,302 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:42:57,308 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 00:42:57,364 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:42:57,384 INFO L195 MainTranslator]: Completed translation [2018-12-09 00:42:57,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57 WrapperNode [2018-12-09 00:42:57,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 00:42:57,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 00:42:57,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 00:42:57,385 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 00:42:57,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 00:42:57,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 00:42:57,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 00:42:57,403 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 00:42:57,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... [2018-12-09 00:42:57,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 00:42:57,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 00:42:57,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 00:42:57,428 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 00:42:57,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/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 [2018-12-09 00:42:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-09 00:42:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-09 00:42:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 00:42:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 00:42:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 00:42:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 00:42:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 00:42:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 00:42:57,689 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 00:42:57,690 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 00:42:57,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:42:57 BoogieIcfgContainer [2018-12-09 00:42:57,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 00:42:57,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 00:42:57,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 00:42:57,692 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 00:42:57,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:42:57" (1/3) ... [2018-12-09 00:42:57,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5bec04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:42:57, skipping insertion in model container [2018-12-09 00:42:57,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:42:57" (2/3) ... [2018-12-09 00:42:57,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5bec04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:42:57, skipping insertion in model container [2018-12-09 00:42:57,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:42:57" (3/3) ... [2018-12-09 00:42:57,694 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_flag_false-unreach-call_false-valid-deref.i [2018-12-09 00:42:57,700 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 00:42:57,705 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 35 error locations. [2018-12-09 00:42:57,714 INFO L257 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2018-12-09 00:42:57,729 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 00:42:57,729 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 00:42:57,729 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 00:42:57,729 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 00:42:57,729 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 00:42:57,730 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 00:42:57,730 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 00:42:57,730 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 00:42:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2018-12-09 00:42:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 00:42:57,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:57,745 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:57,747 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:57,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:57,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1363910960, now seen corresponding path program 1 times [2018-12-09 00:42:57,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:57,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:57,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:57,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:57,778 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:42:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:42:57,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:42:57,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 00:42:57,821 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:42:57,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 00:42:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 00:42:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 00:42:57,833 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 2 states. [2018-12-09 00:42:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:42:57,846 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2018-12-09 00:42:57,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 00:42:57,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-09 00:42:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:42:57,851 INFO L225 Difference]: With dead ends: 88 [2018-12-09 00:42:57,851 INFO L226 Difference]: Without dead ends: 80 [2018-12-09 00:42:57,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 00:42:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-09 00:42:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-12-09 00:42:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-09 00:42:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2018-12-09 00:42:57,874 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 10 [2018-12-09 00:42:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:42:57,874 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2018-12-09 00:42:57,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 00:42:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2018-12-09 00:42:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 00:42:57,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:57,875 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:57,875 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:57,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash -754851559, now seen corresponding path program 1 times [2018-12-09 00:42:57,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:57,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:57,876 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:42:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:42:57,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:42:57,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 00:42:57,918 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:42:57,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 00:42:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 00:42:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 00:42:57,919 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 4 states. [2018-12-09 00:42:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:42:58,017 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2018-12-09 00:42:58,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 00:42:58,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-09 00:42:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:42:58,018 INFO L225 Difference]: With dead ends: 88 [2018-12-09 00:42:58,018 INFO L226 Difference]: Without dead ends: 88 [2018-12-09 00:42:58,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 00:42:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-09 00:42:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2018-12-09 00:42:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-09 00:42:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2018-12-09 00:42:58,025 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 12 [2018-12-09 00:42:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:42:58,026 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2018-12-09 00:42:58,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 00:42:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2018-12-09 00:42:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 00:42:58,026 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:58,026 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:58,027 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:58,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash -754851558, now seen corresponding path program 1 times [2018-12-09 00:42:58,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:58,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:58,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,028 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:42:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:42:58,071 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:42:58,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 00:42:58,071 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:42:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 00:42:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 00:42:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 00:42:58,072 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 4 states. [2018-12-09 00:42:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:42:58,159 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2018-12-09 00:42:58,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 00:42:58,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-09 00:42:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:42:58,160 INFO L225 Difference]: With dead ends: 105 [2018-12-09 00:42:58,160 INFO L226 Difference]: Without dead ends: 105 [2018-12-09 00:42:58,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 00:42:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-09 00:42:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2018-12-09 00:42:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 00:42:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2018-12-09 00:42:58,165 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 12 [2018-12-09 00:42:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:42:58,165 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2018-12-09 00:42:58,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 00:42:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2018-12-09 00:42:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 00:42:58,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:58,165 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:58,166 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:58,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -853537257, now seen corresponding path program 1 times [2018-12-09 00:42:58,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:58,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:58,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,167 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:42:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:42:58,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:42:58,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 00:42:58,218 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:42:58,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 00:42:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 00:42:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 00:42:58,218 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 5 states. [2018-12-09 00:42:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:42:58,326 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2018-12-09 00:42:58,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 00:42:58,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 00:42:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:42:58,327 INFO L225 Difference]: With dead ends: 151 [2018-12-09 00:42:58,327 INFO L226 Difference]: Without dead ends: 148 [2018-12-09 00:42:58,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-12-09 00:42:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-09 00:42:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 122. [2018-12-09 00:42:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-09 00:42:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2018-12-09 00:42:58,334 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 22 [2018-12-09 00:42:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:42:58,334 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2018-12-09 00:42:58,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 00:42:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2018-12-09 00:42:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 00:42:58,335 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:58,335 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:58,335 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:58,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash -712002114, now seen corresponding path program 1 times [2018-12-09 00:42:58,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:58,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:58,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,337 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:42:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:42:58,370 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:42:58,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 00:42:58,370 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:42:58,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 00:42:58,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 00:42:58,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 00:42:58,371 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 6 states. [2018-12-09 00:42:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:42:58,493 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2018-12-09 00:42:58,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 00:42:58,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-12-09 00:42:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:42:58,494 INFO L225 Difference]: With dead ends: 130 [2018-12-09 00:42:58,495 INFO L226 Difference]: Without dead ends: 130 [2018-12-09 00:42:58,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-12-09 00:42:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-09 00:42:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2018-12-09 00:42:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-09 00:42:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2018-12-09 00:42:58,501 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 22 [2018-12-09 00:42:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:42:58,501 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2018-12-09 00:42:58,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 00:42:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2018-12-09 00:42:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 00:42:58,502 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:42:58,502 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:42:58,503 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr26REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr34ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr18REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-09 00:42:58,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:42:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 135291066, now seen corresponding path program 1 times [2018-12-09 00:42:58,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:42:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:42:58,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:42:58,504 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:42:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:42:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 00:42:58,543 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 00:42:58,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:42:58 BoogieIcfgContainer [2018-12-09 00:42:58,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 00:42:58,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 00:42:58,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 00:42:58,567 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 00:42:58,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:42:57" (3/4) ... [2018-12-09 00:42:58,569 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 00:42:58,599 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_18cc9fc2-fe9a-4481-a339-26d0c1a42896/bin-2019/utaipan/witness.graphml [2018-12-09 00:42:58,599 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 00:42:58,599 INFO L168 Benchmark]: Toolchain (without parser) took 1472.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.1 MB). Free memory was 951.3 MB in the beginning and 866.9 MB in the end (delta: 84.4 MB). Peak memory consumption was 161.5 MB. Max. memory is 11.5 GB. [2018-12-09 00:42:58,600 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:42:58,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.1 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -109.3 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. [2018-12-09 00:42:58,601 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.04 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-12-09 00:42:58,601 INFO L168 Benchmark]: Boogie Preprocessor took 24.62 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. [2018-12-09 00:42:58,602 INFO L168 Benchmark]: RCFGBuilder took 262.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:42:58,602 INFO L168 Benchmark]: TraceAbstraction took 876.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 866.9 MB in the end (delta: 157.4 MB). Peak memory consumption was 157.4 MB. Max. memory is 11.5 GB. [2018-12-09 00:42:58,602 INFO L168 Benchmark]: Witness Printer took 31.79 ms. Allocated memory is still 1.1 GB. Free memory is still 866.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:42:58,604 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 255.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.1 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -109.3 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.04 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.62 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 262.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 876.33 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 866.9 MB in the end (delta: 157.4 MB). Peak memory consumption was 157.4 MB. Max. memory is 11.5 GB. * Witness Printer took 31.79 ms. Allocated memory is still 1.1 GB. Free memory is still 866.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 662]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L628] List p, a, t; [L629] a = (List) malloc(sizeof(struct node)) VAL [a={18:0}, malloc(sizeof(struct node))={18:0}] [L630] COND FALSE !(a == 0) VAL [a={18:0}, malloc(sizeof(struct node))={18:0}] [L631] p = a [L632] int i = 0; VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}] [L633] i < 20 && __VERIFIER_nondet_int() [L633] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={18:0}, i=0, i < 20 && __VERIFIER_nondet_int()=0, malloc(sizeof(struct node))={18:0}, p={18:0}] [L633] COND FALSE !(i < 20 && __VERIFIER_nondet_int()) [L646] p->h = 3 VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}] [L647] p = a VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}] [L648] EXPR p->h VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}, p->h=3] [L648] COND FALSE !(p->h != 3) [L659] EXPR p->h VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}, p->h=3] [L659] COND FALSE !(p->h != 3 || i > 20) [L661] p = a VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}] [L662] EXPR p->n VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}, p->n={17:15}] [L662] COND TRUE p->n != 0 [L663] EXPR p->n VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}, p->n={17:15}] [L663] t = p->n [L664] free(p) VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={18:0}, t={17:15}] [L664] free(p) [L665] p = t VAL [a={18:0}, i=0, malloc(sizeof(struct node))={18:0}, p={17:15}, t={17:15}] [L662] p->n - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 90 locations, 35 error locations. UNSAFE Result, 0.8s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 269 SDtfs, 432 SDslu, 312 SDs, 0 SdLazy, 444 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 74 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 4454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...