./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ebd5b9a3160cad0f8876c1414f4b918e994ed8d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-5842f4b [2018-11-18 13:58:12,704 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:58:12,705 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:58:12,713 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:58:12,713 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:58:12,714 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:58:12,715 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:58:12,716 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:58:12,717 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:58:12,718 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:58:12,718 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:58:12,718 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:58:12,719 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:58:12,720 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:58:12,720 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:58:12,721 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:58:12,721 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:58:12,723 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:58:12,724 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:58:12,725 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:58:12,726 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:58:12,726 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:58:12,728 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:58:12,728 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:58:12,728 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:58:12,729 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:58:12,729 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:58:12,730 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:58:12,731 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:58:12,731 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:58:12,731 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:58:12,732 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:58:12,732 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:58:12,732 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:58:12,733 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:58:12,733 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:58:12,734 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 13:58:12,743 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:58:12,744 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:58:12,744 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:58:12,744 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:58:12,744 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:58:12,745 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:58:12,745 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:58:12,746 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:58:12,746 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:58:12,746 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:58:12,746 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:58:12,746 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:58:12,747 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:58:12,748 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:58:12,748 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:58:12,748 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:58:12,748 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:58:12,748 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:58:12,748 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:58:12,749 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:58:12,749 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:58:12,750 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ebd5b9a3160cad0f8876c1414f4b918e994ed8d [2018-11-18 13:58:12,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:58:12,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:58:12,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:58:12,784 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:58:12,784 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:58:12,784 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:58:12,819 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/data/c6d7aa525/1945b7a09eff4ed6b1185d38a35cdd7b/FLAG20c7c96f3 [2018-11-18 13:58:13,240 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:58:13,241 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/sv-benchmarks/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:58:13,248 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/data/c6d7aa525/1945b7a09eff4ed6b1185d38a35cdd7b/FLAG20c7c96f3 [2018-11-18 13:58:13,259 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/data/c6d7aa525/1945b7a09eff4ed6b1185d38a35cdd7b [2018-11-18 13:58:13,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:58:13,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:58:13,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:58:13,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:58:13,264 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:58:13,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f34336b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13, skipping insertion in model container [2018-11-18 13:58:13,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:58:13,299 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:58:13,483 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:58:13,489 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:58:13,517 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:58:13,593 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:58:13,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13 WrapperNode [2018-11-18 13:58:13,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:58:13,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:58:13,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:58:13,595 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:58:13,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:58:13,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:58:13,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:58:13,617 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:58:13,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... [2018-11-18 13:58:13,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:58:13,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:58:13,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:58:13,639 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:58:13,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-18 13:58:13,682 INFO L138 BoogieDeclarations]: Found implementation of procedure exit [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:58:13,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:58:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:58:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:58:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 13:58:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 13:58:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:58:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:58:13,885 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:58:13,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:58:13 BoogieIcfgContainer [2018-11-18 13:58:13,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:58:13,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:58:13,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:58:13,889 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:58:13,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:58:13" (1/3) ... [2018-11-18 13:58:13,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3a78f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:58:13, skipping insertion in model container [2018-11-18 13:58:13,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:58:13" (2/3) ... [2018-11-18 13:58:13,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3a78f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:58:13, skipping insertion in model container [2018-11-18 13:58:13,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:58:13" (3/3) ... [2018-11-18 13:58:13,892 INFO L112 eAbstractionObserver]: Analyzing ICFG list_flag_false-unreach-call_false-valid-memcleanup.i [2018-11-18 13:58:13,900 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:58:13,907 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:58:13,922 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:58:13,949 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:58:13,949 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:58:13,949 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:58:13,949 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:58:13,949 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:58:13,949 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:58:13,949 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:58:13,950 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:58:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-11-18 13:58:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:58:13,969 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:13,970 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:13,972 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:13,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1609882282, now seen corresponding path program 1 times [2018-11-18 13:58:13,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,020 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:58:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:58:14,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:58:14,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:58:14,090 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:58:14,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:58:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:58:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:58:14,107 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-11-18 13:58:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:58:14,125 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2018-11-18 13:58:14,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:58:14,125 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-11-18 13:58:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:58:14,130 INFO L225 Difference]: With dead ends: 51 [2018-11-18 13:58:14,130 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 13:58:14,133 INFO L604 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 [2018-11-18 13:58:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 13:58:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 13:58:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 13:58:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-18 13:58:14,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2018-11-18 13:58:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:58:14,160 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-18 13:58:14,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:58:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-18 13:58:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:58:14,161 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:14,162 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:14,162 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:14,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -750865625, now seen corresponding path program 1 times [2018-11-18 13:58:14,162 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:58:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:58:14,248 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:58:14,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:58:14,248 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:58:14,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:58:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:58:14,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:58:14,249 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2018-11-18 13:58:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:58:14,370 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2018-11-18 13:58:14,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:58:14,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-18 13:58:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:58:14,371 INFO L225 Difference]: With dead ends: 56 [2018-11-18 13:58:14,371 INFO L226 Difference]: Without dead ends: 52 [2018-11-18 13:58:14,372 INFO L604 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 [2018-11-18 13:58:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-18 13:58:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2018-11-18 13:58:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 13:58:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2018-11-18 13:58:14,377 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2018-11-18 13:58:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:58:14,378 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2018-11-18 13:58:14,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:58:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2018-11-18 13:58:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 13:58:14,378 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:14,378 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:14,379 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:14,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash 127281064, now seen corresponding path program 1 times [2018-11-18 13:58:14,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,380 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:58:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:58:14,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:58:14,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:58:14,426 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:58:14,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:58:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:58:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:58:14,427 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 5 states. [2018-11-18 13:58:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:58:14,473 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2018-11-18 13:58:14,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:58:14,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 13:58:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:58:14,474 INFO L225 Difference]: With dead ends: 59 [2018-11-18 13:58:14,474 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 13:58:14,475 INFO L604 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 [2018-11-18 13:58:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 13:58:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2018-11-18 13:58:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 13:58:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2018-11-18 13:58:14,478 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2018-11-18 13:58:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:58:14,478 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2018-11-18 13:58:14,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:58:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2018-11-18 13:58:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 13:58:14,479 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:14,479 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:14,479 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:14,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:14,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2032202648, now seen corresponding path program 1 times [2018-11-18 13:58:14,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,480 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:58:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:58:14,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:58:14,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:58:14,532 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:58:14,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:58:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:58:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:58:14,533 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 5 states. [2018-11-18 13:58:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:58:14,609 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-11-18 13:58:14,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:58:14,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 13:58:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:58:14,610 INFO L225 Difference]: With dead ends: 56 [2018-11-18 13:58:14,610 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 13:58:14,610 INFO L604 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 [2018-11-18 13:58:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 13:58:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2018-11-18 13:58:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:58:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 13:58:14,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2018-11-18 13:58:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:58:14,613 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 13:58:14,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:58:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 13:58:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 13:58:14,614 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:14,614 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:14,614 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:14,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash -468618363, now seen corresponding path program 1 times [2018-11-18 13:58:14,615 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,616 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:58:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:58:14,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:58:14,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:58:14,643 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:58:14,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:58:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:58:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:58:14,644 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2018-11-18 13:58:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:58:14,656 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2018-11-18 13:58:14,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:58:14,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2018-11-18 13:58:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:58:14,657 INFO L225 Difference]: With dead ends: 62 [2018-11-18 13:58:14,657 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 13:58:14,658 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:58:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 13:58:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-11-18 13:58:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 13:58:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-11-18 13:58:14,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2018-11-18 13:58:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:58:14,661 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-11-18 13:58:14,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:58:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-11-18 13:58:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 13:58:14,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:58:14,662 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:58:14,662 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:58:14,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:58:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1319858053, now seen corresponding path program 1 times [2018-11-18 13:58:14,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:58:14,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:58:14,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:58:14,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:58:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:58:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:58:14,696 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:58:14,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:58:14 BoogieIcfgContainer [2018-11-18 13:58:14,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:58:14,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:58:14,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:58:14,719 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:58:14,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:58:13" (3/4) ... [2018-11-18 13:58:14,722 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:58:14,751 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3bd62d94-bf6e-4e7b-8e7a-0f0541094550/bin-2019/utaipan/witness.graphml [2018-11-18 13:58:14,751 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:58:14,752 INFO L168 Benchmark]: Toolchain (without parser) took 1490.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 956.6 MB in the beginning and 986.1 MB in the end (delta: -29.6 MB). Peak memory consumption was 80.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:58:14,753 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:58:14,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 956.6 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 11.5 GB. [2018-11-18 13:58:14,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.22 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. [2018-11-18 13:58:14,754 INFO L168 Benchmark]: Boogie Preprocessor took 21.38 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. [2018-11-18 13:58:14,754 INFO L168 Benchmark]: RCFGBuilder took 246.89 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:58:14,754 INFO L168 Benchmark]: TraceAbstraction took 833.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 988.8 MB in the end (delta: 84.4 MB). Peak memory consumption was 84.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:58:14,754 INFO L168 Benchmark]: Witness Printer took 31.95 ms. Allocated memory is still 1.1 GB. Free memory was 988.8 MB in the beginning and 986.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:58:14,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 331.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 956.6 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.22 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. * Boogie Preprocessor took 21.38 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 246.89 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: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 833.22 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 988.8 MB in the end (delta: 84.4 MB). Peak memory consumption was 84.4 MB. Max. memory is 11.5 GB. * Witness Printer took 31.95 ms. Allocated memory is still 1.1 GB. Free memory was 988.8 MB in the beginning and 986.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 652]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = __VERIFIER_nondet_int(); [L628] List p, a, t; [L629] EXPR, FCALL malloc(sizeof(struct node)) [L629] a = (List) malloc(sizeof(struct node)) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}] [L630] COND FALSE !(a == 0) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}] [L631] p = a VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, p={10:0}] [L632] COND TRUE __VERIFIER_nondet_int() [L633] COND FALSE !(\read(flag)) [L636] FCALL p->h = 2 VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, p={10:0}] [L638] EXPR, FCALL malloc(sizeof(struct node)) [L638] t = (List) malloc(sizeof(struct node)) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] [L639] COND FALSE !(t == 0) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] [L640] FCALL p->n = t [L641] EXPR, FCALL p->n [L641] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L643] FCALL p->h = 3 [L644] p = a VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, malloc(sizeof(struct node))={12:0}, p={10:0}, t={12:0}] [L645] COND FALSE !(\read(flag)) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, malloc(sizeof(struct node))={12:0}, p={10:0}, t={12:0}] [L649] EXPR, FCALL p->h VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, malloc(sizeof(struct node))={12:0}, p={10:0}, p->h=2, t={12:0}] [L649] COND FALSE !(p->h == 1) [L651] EXPR, FCALL p->h VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, p->h=2, t={12:0}] [L651] COND TRUE p->h != 3 [L652] __VERIFIER_error() VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. UNSAFE Result, 0.7s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 145 SDtfs, 85 SDslu, 211 SDs, 0 SdLazy, 132 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 46 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 5283 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 9/9 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...