./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a10fd260c2f708e346588150444ddfe9656de05 ................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:06:36,945 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:06:36,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:06:36,954 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:06:36,954 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:06:36,955 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:06:36,956 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:06:36,957 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:06:36,958 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:06:36,958 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:06:36,959 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:06:36,959 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:06:36,960 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:06:36,961 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:06:36,961 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:06:36,962 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:06:36,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:06:36,964 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:06:36,965 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:06:36,966 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:06:36,967 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:06:36,968 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:06:36,969 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:06:36,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:06:36,969 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:06:36,970 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:06:36,971 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:06:36,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:06:36,972 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:06:36,973 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:06:36,973 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:06:36,973 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:06:36,974 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:06:36,974 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:06:36,974 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:06:36,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:06:36,975 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 11:06:36,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:06:36,985 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:06:36,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 11:06:36,986 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 11:06:36,986 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:06:36,986 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:06:36,986 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:06:36,986 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:06:36,987 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 11:06:36,988 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:06:36,988 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 11:06:36,988 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a10fd260c2f708e346588150444ddfe9656de05 [2018-11-28 11:06:37,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:06:37,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:06:37,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:06:37,021 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:06:37,021 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:06:37,022 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i [2018-11-28 11:06:37,058 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/data/1d799076d/68a6fe2c6d4c493ba019ccb054b0de10/FLAGfab2a1d6f [2018-11-28 11:06:37,389 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:06:37,390 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i [2018-11-28 11:06:37,398 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/data/1d799076d/68a6fe2c6d4c493ba019ccb054b0de10/FLAGfab2a1d6f [2018-11-28 11:06:37,407 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/data/1d799076d/68a6fe2c6d4c493ba019ccb054b0de10 [2018-11-28 11:06:37,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:06:37,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:06:37,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:06:37,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:06:37,412 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:06:37,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29741fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37, skipping insertion in model container [2018-11-28 11:06:37,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:06:37,443 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:06:37,638 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:06:37,646 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:06:37,720 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:06:37,745 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:06:37,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37 WrapperNode [2018-11-28 11:06:37,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:06:37,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:06:37,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:06:37,747 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:06:37,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:06:37,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:06:37,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:06:37,769 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:06:37,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... [2018-11-28 11:06:37,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:06:37,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:06:37,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:06:37,800 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:06:37,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:06:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-11-28 11:06:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-11-28 11:06:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 11:06:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2018-11-28 11:06:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 11:06:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 11:06:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-28 11:06:37,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-28 11:06:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2018-11-28 11:06:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2018-11-28 11:06:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2018-11-28 11:06:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2018-11-28 11:06:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 11:06:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:06:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:06:38,194 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:06:38,194 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 11:06:38,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:06:38 BoogieIcfgContainer [2018-11-28 11:06:38,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:06:38,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 11:06:38,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 11:06:38,198 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 11:06:38,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:06:37" (1/3) ... [2018-11-28 11:06:38,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb0dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:06:38, skipping insertion in model container [2018-11-28 11:06:38,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:06:37" (2/3) ... [2018-11-28 11:06:38,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb0dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:06:38, skipping insertion in model container [2018-11-28 11:06:38,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:06:38" (3/3) ... [2018-11-28 11:06:38,201 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl_false-unreach-call.i [2018-11-28 11:06:38,209 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 11:06:38,214 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 11:06:38,224 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 11:06:38,244 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:06:38,245 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 11:06:38,245 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 11:06:38,245 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 11:06:38,245 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:06:38,245 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:06:38,245 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 11:06:38,245 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:06:38,245 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 11:06:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-11-28 11:06:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 11:06:38,262 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:06:38,263 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:06:38,264 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:06:38,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:06:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -211103612, now seen corresponding path program 1 times [2018-11-28 11:06:38,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:06:38,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:06:38,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:06:38,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:06:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:06:38,359 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:06:38,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 11:06:38,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 11:06:38,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 11:06:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 11:06:38,370 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-11-28 11:06:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:06:38,388 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2018-11-28 11:06:38,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 11:06:38,389 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-11-28 11:06:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:06:38,395 INFO L225 Difference]: With dead ends: 92 [2018-11-28 11:06:38,395 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 11:06:38,398 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 [2018-11-28 11:06:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 11:06:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 11:06:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 11:06:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 11:06:38,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 11:06:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:06:38,421 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 11:06:38,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 11:06:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 11:06:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 11:06:38,422 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:06:38,422 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:06:38,422 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:06:38,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:06:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085091, now seen corresponding path program 1 times [2018-11-28 11:06:38,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:06:38,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:06:38,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:06:38,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:06:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:06:38,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:06:38,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:06:38,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:06:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:06:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:06:38,516 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-11-28 11:06:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:06:38,604 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-28 11:06:38,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:06:38,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 11:06:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:06:38,606 INFO L225 Difference]: With dead ends: 33 [2018-11-28 11:06:38,606 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 11:06:38,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-28 11:06:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 11:06:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2018-11-28 11:06:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 11:06:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 11:06:38,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2018-11-28 11:06:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:06:38,610 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 11:06:38,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:06:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 11:06:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-28 11:06:38,611 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:06:38,611 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:06:38,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:06:38,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:06:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1771436792, now seen corresponding path program 1 times [2018-11-28 11:06:38,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:06:38,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:06:38,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:06:38,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:06:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:06:38,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:06:38,767 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:06:38,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:06:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:06:38,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:06:38,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-28 11:06:38,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-28 11:06:38,869 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,870 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-28 11:06:38,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-28 11:06:38,880 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,882 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,894 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2018-11-28 11:06:38,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-11-28 11:06:38,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-11-28 11:06:38,912 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,914 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-11-28 11:06:38,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-11-28 11:06:38,920 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,921 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-28 11:06:38,924 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-11-28 11:06:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:06:38,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:06:38,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 11:06:38,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 11:06:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:06:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:06:38,940 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-11-28 11:06:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:06:39,011 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-11-28 11:06:39,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:06:39,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-28 11:06:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:06:39,013 INFO L225 Difference]: With dead ends: 37 [2018-11-28 11:06:39,013 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 11:06:39,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:06:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 11:06:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-11-28 11:06:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-28 11:06:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-28 11:06:39,018 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-11-28 11:06:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:06:39,018 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-28 11:06:39,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 11:06:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-28 11:06:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 11:06:39,019 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:06:39,019 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:06:39,019 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:06:39,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:06:39,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1763687606, now seen corresponding path program 1 times [2018-11-28 11:06:39,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:06:39,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:06:39,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:39,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:06:39,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:06:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:06:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:06:39,064 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 11:06:39,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:06:39 BoogieIcfgContainer [2018-11-28 11:06:39,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 11:06:39,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:06:39,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:06:39,089 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:06:39,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:06:38" (3/4) ... [2018-11-28 11:06:39,091 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 11:06:39,130 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_89045e0c-7785-4b01-aef1-87e50278c95b/bin-2019/uautomizer/witness.graphml [2018-11-28 11:06:39,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:06:39,131 INFO L168 Benchmark]: Toolchain (without parser) took 1721.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 950.6 MB in the beginning and 939.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 107.8 MB. Max. memory is 11.5 GB. [2018-11-28 11:06:39,132 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:06:39,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -129.0 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:06:39,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.56 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. [2018-11-28 11:06:39,133 INFO L168 Benchmark]: Boogie Preprocessor took 30.40 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. [2018-11-28 11:06:39,134 INFO L168 Benchmark]: RCFGBuilder took 395.16 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: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 11.5 GB. [2018-11-28 11:06:39,134 INFO L168 Benchmark]: TraceAbstraction took 893.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 939.8 MB in the end (delta: 95.8 MB). Peak memory consumption was 95.8 MB. Max. memory is 11.5 GB. [2018-11-28 11:06:39,134 INFO L168 Benchmark]: Witness Printer took 41.59 ms. Allocated memory is still 1.1 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:06:39,136 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 335.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -129.0 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.56 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.40 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. * RCFGBuilder took 395.16 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: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 893.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 939.8 MB in the end (delta: 95.8 MB). Peak memory consumption was 95.8 MB. Max. memory is 11.5 GB. * Witness Printer took 41.59 ms. Allocated memory is still 1.1 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); VAL [a={14:0}, malloc(sizeof(struct node))={14:0}] [L586] COND FALSE !(a == 0) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}] [L587] List t; [L588] List p = a; [L589] a->h = 2 VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, p={14:0}] [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L593] COND FALSE !(t == 0) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L600] COND TRUE p!=0 [L601] EXPR p->h VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, p->h=1, t={20:0}] [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 56 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 91 SDtfs, 39 SDslu, 75 SDs, 0 SdLazy, 54 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4363 SizeOfPredicates, 7 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...