./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/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 27142e71f3089c5c3b5bf4f358882e993f701ffc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-01 13:13:27,801 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 13:13:27,802 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 13:13:27,811 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 13:13:27,811 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 13:13:27,812 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 13:13:27,813 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 13:13:27,814 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 13:13:27,815 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 13:13:27,816 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 13:13:27,816 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 13:13:27,817 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 13:13:27,817 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 13:13:27,818 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 13:13:27,819 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 13:13:27,819 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 13:13:27,820 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 13:13:27,821 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 13:13:27,822 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 13:13:27,823 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 13:13:27,824 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 13:13:27,825 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 13:13:27,827 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 13:13:27,827 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 13:13:27,827 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 13:13:27,828 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 13:13:27,828 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 13:13:27,829 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 13:13:27,830 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 13:13:27,830 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 13:13:27,830 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 13:13:27,831 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 13:13:27,831 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 13:13:27,831 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 13:13:27,832 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 13:13:27,832 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 13:13:27,833 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 13:13:27,843 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 13:13:27,843 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 13:13:27,844 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 13:13:27,844 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 13:13:27,844 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 13:13:27,844 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 13:13:27,844 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 13:13:27,845 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 13:13:27,845 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 13:13:27,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 13:13:27,846 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 13:13:27,847 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 13:13:27,847 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 13:13:27,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 13:13:27,848 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_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/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 -> 27142e71f3089c5c3b5bf4f358882e993f701ffc [2018-12-01 13:13:27,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 13:13:27,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 13:13:27,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 13:13:27,881 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 13:13:27,881 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 13:13:27,881 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert_false-unreach-call_false-valid-memcleanup.i [2018-12-01 13:13:27,914 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/data/01683f0c1/ba007e90f453433dac28d1e7ebc4e340/FLAG0c5e09417 [2018-12-01 13:13:28,265 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 13:13:28,265 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert_false-unreach-call_false-valid-memcleanup.i [2018-12-01 13:13:28,271 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/data/01683f0c1/ba007e90f453433dac28d1e7ebc4e340/FLAG0c5e09417 [2018-12-01 13:13:28,646 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/data/01683f0c1/ba007e90f453433dac28d1e7ebc4e340 [2018-12-01 13:13:28,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 13:13:28,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 13:13:28,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 13:13:28,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 13:13:28,653 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 13:13:28,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306c3a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28, skipping insertion in model container [2018-12-01 13:13:28,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 13:13:28,687 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 13:13:28,855 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:13:28,859 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 13:13:28,921 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:13:28,941 INFO L195 MainTranslator]: Completed translation [2018-12-01 13:13:28,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28 WrapperNode [2018-12-01 13:13:28,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 13:13:28,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 13:13:28,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 13:13:28,942 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 13:13:28,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 13:13:28,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 13:13:28,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 13:13:28,960 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 13:13:28,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... [2018-12-01 13:13:28,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 13:13:28,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 13:13:28,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 13:13:28,979 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 13:13:28,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/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 [2018-12-01 13:13:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-01 13:13:29,009 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-01 13:13:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2018-12-01 13:13:29,009 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2018-12-01 13:13:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 13:13:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2018-12-01 13:13:29,009 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2018-12-01 13:13:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 13:13:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2018-12-01 13:13:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 13:13:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-01 13:13:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2018-12-01 13:13:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2018-12-01 13:13:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 13:13:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 13:13:29,206 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 13:13:29,206 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-01 13:13:29,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:13:29 BoogieIcfgContainer [2018-12-01 13:13:29,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 13:13:29,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 13:13:29,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 13:13:29,209 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 13:13:29,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 01:13:28" (1/3) ... [2018-12-01 13:13:29,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165033ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:13:29, skipping insertion in model container [2018-12-01 13:13:29,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:13:28" (2/3) ... [2018-12-01 13:13:29,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165033ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:13:29, skipping insertion in model container [2018-12-01 13:13:29,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:13:29" (3/3) ... [2018-12-01 13:13:29,211 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert_false-unreach-call_false-valid-memcleanup.i [2018-12-01 13:13:29,217 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 13:13:29,221 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 13:13:29,230 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 13:13:29,246 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 13:13:29,246 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 13:13:29,246 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 13:13:29,247 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 13:13:29,247 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 13:13:29,247 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 13:13:29,247 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 13:13:29,247 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 13:13:29,247 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 13:13:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2018-12-01 13:13:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 13:13:29,261 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:29,261 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:29,262 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:29,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1840538374, now seen corresponding path program 1 times [2018-12-01 13:13:29,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:29,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:29,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 13:13:29,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:29,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/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 [2018-12-01 13:13:29,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-01 13:13:29,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 13:13:29,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2018-12-01 13:13:29,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 13:13:29,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 13:13:29,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 13:13:29,413 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 2 states. [2018-12-01 13:13:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:29,432 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2018-12-01 13:13:29,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 13:13:29,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-12-01 13:13:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:29,440 INFO L225 Difference]: With dead ends: 128 [2018-12-01 13:13:29,440 INFO L226 Difference]: Without dead ends: 53 [2018-12-01 13:13:29,443 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 13:13:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-01 13:13:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-01 13:13:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-01 13:13:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-12-01 13:13:29,471 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 37 [2018-12-01 13:13:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:29,471 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-12-01 13:13:29,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 13:13:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-12-01 13:13:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-01 13:13:29,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:29,473 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:29,473 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:29,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1583146122, now seen corresponding path program 1 times [2018-12-01 13:13:29,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:29,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:29,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:13:29,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:29,569 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:29,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:13:29,637 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 13:13:29,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2018-12-01 13:13:29,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 13:13:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 13:13:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:13:29,638 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 9 states. [2018-12-01 13:13:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:29,718 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2018-12-01 13:13:29,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 13:13:29,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-12-01 13:13:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:29,720 INFO L225 Difference]: With dead ends: 95 [2018-12-01 13:13:29,720 INFO L226 Difference]: Without dead ends: 55 [2018-12-01 13:13:29,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-01 13:13:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-01 13:13:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-01 13:13:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-01 13:13:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-12-01 13:13:29,727 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 44 [2018-12-01 13:13:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:29,729 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-12-01 13:13:29,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 13:13:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-12-01 13:13:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-01 13:13:29,730 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:29,730 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:29,730 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:29,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:29,731 INFO L82 PathProgramCache]: Analyzing trace with hash 435161309, now seen corresponding path program 1 times [2018-12-01 13:13:29,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:29,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:29,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 13:13:29,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 13:13:29,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-01 13:13:29,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 13:13:29,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 13:13:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-12-01 13:13:29,812 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 10 states. [2018-12-01 13:13:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:29,906 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2018-12-01 13:13:29,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 13:13:29,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-12-01 13:13:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:29,909 INFO L225 Difference]: With dead ends: 77 [2018-12-01 13:13:29,909 INFO L226 Difference]: Without dead ends: 73 [2018-12-01 13:13:29,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-12-01 13:13:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-01 13:13:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2018-12-01 13:13:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-01 13:13:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2018-12-01 13:13:29,916 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 48 [2018-12-01 13:13:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:29,916 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2018-12-01 13:13:29,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 13:13:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2018-12-01 13:13:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-01 13:13:29,917 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:29,917 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:29,917 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:29,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1362287860, now seen corresponding path program 1 times [2018-12-01 13:13:29,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:29,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:29,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:29,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 13:13:29,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:29,991 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:29,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:30,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:13:30,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:13:30,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-01 13:13:30,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 13:13:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 13:13:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-01 13:13:30,049 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 10 states. [2018-12-01 13:13:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:30,114 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2018-12-01 13:13:30,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 13:13:30,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2018-12-01 13:13:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:30,115 INFO L225 Difference]: With dead ends: 117 [2018-12-01 13:13:30,115 INFO L226 Difference]: Without dead ends: 68 [2018-12-01 13:13:30,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-12-01 13:13:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-01 13:13:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-01 13:13:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-01 13:13:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2018-12-01 13:13:30,120 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 49 [2018-12-01 13:13:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:30,120 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2018-12-01 13:13:30,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 13:13:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2018-12-01 13:13:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-01 13:13:30,121 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:30,121 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:30,121 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:30,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1571848699, now seen corresponding path program 2 times [2018-12-01 13:13:30,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:30,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:30,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:30,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:30,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 13:13:30,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:30,216 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:30,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 13:13:30,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 13:13:30,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:13:30,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-01 13:13:30,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 13:13:30,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2018-12-01 13:13:30,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-01 13:13:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-01 13:13:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-12-01 13:13:30,333 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 17 states. [2018-12-01 13:13:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:30,667 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2018-12-01 13:13:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-01 13:13:30,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-12-01 13:13:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:30,668 INFO L225 Difference]: With dead ends: 140 [2018-12-01 13:13:30,668 INFO L226 Difference]: Without dead ends: 99 [2018-12-01 13:13:30,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2018-12-01 13:13:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-01 13:13:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2018-12-01 13:13:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-01 13:13:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2018-12-01 13:13:30,675 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 53 [2018-12-01 13:13:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:30,675 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2018-12-01 13:13:30,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-01 13:13:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2018-12-01 13:13:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-01 13:13:30,675 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:30,676 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:30,676 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:30,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash -166205918, now seen corresponding path program 1 times [2018-12-01 13:13:30,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:30,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:30,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:30,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:13:30,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-01 13:13:30,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:30,798 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:30,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:30,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-01 13:13:30,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:13:30,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-01 13:13:30,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 13:13:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 13:13:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-12-01 13:13:30,885 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 14 states. [2018-12-01 13:13:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:31,033 INFO L93 Difference]: Finished difference Result 126 states and 161 transitions. [2018-12-01 13:13:31,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 13:13:31,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2018-12-01 13:13:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:31,035 INFO L225 Difference]: With dead ends: 126 [2018-12-01 13:13:31,035 INFO L226 Difference]: Without dead ends: 122 [2018-12-01 13:13:31,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-12-01 13:13:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-01 13:13:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2018-12-01 13:13:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-01 13:13:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2018-12-01 13:13:31,044 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 54 [2018-12-01 13:13:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2018-12-01 13:13:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 13:13:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2018-12-01 13:13:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-01 13:13:31,045 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:31,045 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:31,045 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:31,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1470164583, now seen corresponding path program 2 times [2018-12-01 13:13:31,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:31,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:31,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 13:13:31,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:31,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:31,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 13:13:31,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 13:13:31,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:13:31,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:31,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-12-01 13:13:31,276 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-12-01 13:13:31,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-01 13:13:31,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 13:13:31,290 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,291 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-01 13:13:31,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 13:13:31,301 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,302 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,306 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2018-12-01 13:13:31,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-01 13:13:31,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-01 13:13:31,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-12-01 13:13:31,312 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2018-12-01 13:13:31,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2018-12-01 13:13:31,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 13:13:31,353 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,358 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2018-12-01 13:13:31,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-01 13:13:31,372 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,376 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,382 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-01 13:13:31,382 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2018-12-01 13:13:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:13:32,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:13:32,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2018-12-01 13:13:32,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-01 13:13:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-01 13:13:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=578, Unknown=6, NotChecked=0, Total=650 [2018-12-01 13:13:32,804 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand 26 states. [2018-12-01 13:13:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:33,421 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2018-12-01 13:13:33,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-01 13:13:33,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-12-01 13:13:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:33,422 INFO L225 Difference]: With dead ends: 173 [2018-12-01 13:13:33,422 INFO L226 Difference]: Without dead ends: 153 [2018-12-01 13:13:33,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=721, Unknown=7, NotChecked=0, Total=812 [2018-12-01 13:13:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-01 13:13:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2018-12-01 13:13:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-12-01 13:13:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2018-12-01 13:13:33,438 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 55 [2018-12-01 13:13:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:33,440 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2018-12-01 13:13:33,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-01 13:13:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2018-12-01 13:13:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-01 13:13:33,442 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:33,442 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:33,442 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:33,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1269083353, now seen corresponding path program 1 times [2018-12-01 13:13:33,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:33,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:33,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:13:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-01 13:13:33,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:13:33,537 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:13:33,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:13:33,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:13:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-01 13:13:33,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:13:33,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-12-01 13:13:33,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 13:13:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 13:13:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-01 13:13:33,624 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand 14 states. [2018-12-01 13:13:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:13:33,842 INFO L93 Difference]: Finished difference Result 271 states and 356 transitions. [2018-12-01 13:13:33,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 13:13:33,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2018-12-01 13:13:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:13:33,844 INFO L225 Difference]: With dead ends: 271 [2018-12-01 13:13:33,844 INFO L226 Difference]: Without dead ends: 186 [2018-12-01 13:13:33,844 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-12-01 13:13:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-12-01 13:13:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 157. [2018-12-01 13:13:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-01 13:13:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2018-12-01 13:13:33,857 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 57 [2018-12-01 13:13:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:13:33,857 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2018-12-01 13:13:33,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 13:13:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2018-12-01 13:13:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-01 13:13:33,857 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:13:33,858 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:13:33,858 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:13:33,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:13:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1691785179, now seen corresponding path program 1 times [2018-12-01 13:13:33,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:13:33,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:13:33,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:33,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:13:33,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:13:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:13:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:13:33,893 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 13:13:33,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 01:13:33 BoogieIcfgContainer [2018-12-01 13:13:33,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 13:13:33,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 13:13:33,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 13:13:33,917 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 13:13:33,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:13:29" (3/4) ... [2018-12-01 13:13:33,918 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 13:13:33,953 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fa6ad553-b24d-4fbf-8d9c-3d8979ecdfb7/bin-2019/uautomizer/witness.graphml [2018-12-01 13:13:33,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 13:13:33,953 INFO L168 Benchmark]: Toolchain (without parser) took 5304.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 950.7 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:13:33,954 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:13:33,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.7 MB in the beginning and 1.1 GB in the end (delta: -137.5 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2018-12-01 13:13:33,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.49 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:13:33,955 INFO L168 Benchmark]: Boogie Preprocessor took 18.84 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-01 13:13:33,955 INFO L168 Benchmark]: RCFGBuilder took 228.21 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2018-12-01 13:13:33,955 INFO L168 Benchmark]: TraceAbstraction took 4709.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -96.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:13:33,955 INFO L168 Benchmark]: Witness Printer took 36.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 13:13:33,956 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 979.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 950.7 MB in the beginning and 1.1 GB in the end (delta: -137.5 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.49 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 18.84 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 228.21 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4709.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -96.2 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 36.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 630]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L609] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L616] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L616] const int len = _get_nondet_int(2, 5); [L617] SLL s = sll_create(len); VAL [len=2, s={7:0}] [L617] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L564] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L565] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L570] new_head->next = head [L571] head = new_head VAL [\old(len)=2, head={6:0}, len=1, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L565] EXPR len-- VAL [\old(len)=2, head={6:0}, len=0, len--=1, malloc(sizeof(struct node))={6:0}, new_head={6:0}] [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={6:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={6:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L570] new_head->next = head [L571] head = new_head VAL [\old(len)=2, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L565] EXPR len-- VAL [\old(len)=2, head={9:0}, len=-1, len--=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L565] COND FALSE !(len-- > 0) [L573] return head; VAL [\old(len)=2, \result={9:0}, head={9:0}, len=-1, malloc(sizeof(struct node))={9:0}, new_head={9:0}] [L617] RET, EXPR sll_create(len) VAL [len=2, s={7:0}, sll_create(len)={9:0}] [L617] SLL s = sll_create(len); [L618] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L609] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L610] COND TRUE len < until && __VERIFIER_nondet_int() [L611] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L618] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={7:0}] [L618] const int k = _get_nondet_int(0, len - 1); [L619] int i = 0; VAL [i=0, k=1, len=2, s={7:0}] [L620] i < k && __VERIFIER_nondet_int() [L620] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={7:0}] [L620] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L625] EXPR \read(s) VAL [\read(s)={9:0}, i=0, k=1, len=2, s={7:0}] [L625] CALL, EXPR sll_length(s) VAL [head={9:0}] [L576] int len = 0; VAL [head={9:0}, head={9:0}, len=0] [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND FALSE !(\read(head)) VAL [head={0:0}, head={9:0}, len=2] [L581] return len; VAL [\result=2, head={0:0}, head={9:0}, len=2] [L625] RET, EXPR sll_length(s) VAL [\read(s)={9:0}, i=0, k=1, len=2, s={7:0}, sll_length(s)=2] [L625] COND TRUE k + len != sll_length(s) [L630] __VERIFIER_error() VAL [i=0, k=1, len=2, s={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 69 locations, 1 error locations. UNSAFE Result, 4.6s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 487 SDtfs, 264 SDslu, 3991 SDs, 0 SdLazy, 1786 SolverSat, 70 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 457 GetRequests, 326 SyntacticMatches, 14 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 102 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 803 NumberOfCodeBlocks, 803 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 731 ConstructedInterpolants, 16 QuantifiedInterpolants, 283074 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1380 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 130/211 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...