./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/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 cfdde8b1798318c3bb26b76a748741913b280952 ........................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 04:24:32,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:24:32,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:24:32,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:24:32,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:24:32,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:24:32,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:24:32,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:24:32,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:24:32,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:24:32,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:24:32,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:24:32,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:24:32,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:24:32,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:24:32,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:24:32,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:24:32,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:24:32,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:24:32,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:24:32,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:24:32,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:24:32,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:24:32,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:24:32,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:24:32,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:24:32,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:24:32,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:24:32,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:24:32,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:24:32,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:24:32,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:24:32,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:24:32,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:24:32,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:24:32,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:24:32,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:24:32,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:24:32,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:24:32,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:24:32,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:24:32,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:24:32,702 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:24:32,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:24:32,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:24:32,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:24:32,704 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:24:32,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:24:32,704 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:24:32,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:24:32,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:24:32,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:24:32,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:24:32,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:24:32,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:24:32,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:24:32,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:24:32,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:24:32,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:24:32,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:24:32,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:24:32,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:24:32,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:24:32,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:24:32,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:24:32,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:24:32,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:24:32,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:24:32,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:24:32,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:24:32,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/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 -> cfdde8b1798318c3bb26b76a748741913b280952 [2019-11-20 04:24:32,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:24:32,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:24:32,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:24:32,857 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:24:32,866 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:24:32,866 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-11-20 04:24:32,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/data/c545065cf/972e28100f0d44a4a2ff118ccbbc34a1/FLAG70dd31083 [2019-11-20 04:24:33,401 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:24:33,405 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-11-20 04:24:33,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/data/c545065cf/972e28100f0d44a4a2ff118ccbbc34a1/FLAG70dd31083 [2019-11-20 04:24:33,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/data/c545065cf/972e28100f0d44a4a2ff118ccbbc34a1 [2019-11-20 04:24:33,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:24:33,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:24:33,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:24:33,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:24:33,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:24:33,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:24:33" (1/1) ... [2019-11-20 04:24:33,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353039cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:33, skipping insertion in model container [2019-11-20 04:24:33,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:24:33" (1/1) ... [2019-11-20 04:24:33,903 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:24:33,950 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:24:34,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:24:34,321 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:24:34,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:24:34,428 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:24:34,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34 WrapperNode [2019-11-20 04:24:34,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:24:34,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:24:34,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:24:34,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:24:34,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:24:34,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:24:34,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:24:34,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:24:34,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... [2019-11-20 04:24:34,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:24:34,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:24:34,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:24:34,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:24:34,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/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 [2019-11-20 04:24:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 04:24:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 04:24:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 04:24:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 04:24:34,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 04:24:34,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:24:34,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:24:34,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:24:34,929 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:24:34,930 INFO L285 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-20 04:24:34,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:24:34 BoogieIcfgContainer [2019-11-20 04:24:34,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:24:34,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:24:34,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:24:34,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:24:34,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:24:33" (1/3) ... [2019-11-20 04:24:34,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e96ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:24:34, skipping insertion in model container [2019-11-20 04:24:34,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:24:34" (2/3) ... [2019-11-20 04:24:34,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e96ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:24:34, skipping insertion in model container [2019-11-20 04:24:34,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:24:34" (3/3) ... [2019-11-20 04:24:34,946 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2019-11-20 04:24:34,955 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:24:34,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:24:34,969 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:24:34,988 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:24:34,988 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:24:34,989 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:24:34,989 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:24:34,989 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:24:34,989 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:24:34,989 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:24:34,989 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:24:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-20 04:24:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 04:24:35,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:24:35,008 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:24:35,009 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:24:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:24:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2019-11-20 04:24:35,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:24:35,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088959403] [2019-11-20 04:24:35,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:24:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:24:35,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088959403] [2019-11-20 04:24:35,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:24:35,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 04:24:35,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066820196] [2019-11-20 04:24:35,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:24:35,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:24:35,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:24:35,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:24:35,160 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-20 04:24:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:24:35,201 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2019-11-20 04:24:35,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:24:35,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 04:24:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:24:35,211 INFO L225 Difference]: With dead ends: 56 [2019-11-20 04:24:35,211 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 04:24:35,214 INFO L630 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 [2019-11-20 04:24:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 04:24:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 04:24:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 04:24:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-20 04:24:35,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2019-11-20 04:24:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:24:35,246 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-20 04:24:35,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:24:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-20 04:24:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 04:24:35,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:24:35,248 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:24:35,248 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:24:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:24:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -780239213, now seen corresponding path program 1 times [2019-11-20 04:24:35,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:24:35,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616385025] [2019-11-20 04:24:35,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:24:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:24:35,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616385025] [2019-11-20 04:24:35,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:24:35,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 04:24:35,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591018707] [2019-11-20 04:24:35,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:24:35,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:24:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:24:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:24:35,311 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2019-11-20 04:24:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:24:35,336 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2019-11-20 04:24:35,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:24:35,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-20 04:24:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:24:35,338 INFO L225 Difference]: With dead ends: 47 [2019-11-20 04:24:35,338 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 04:24:35,339 INFO L630 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 [2019-11-20 04:24:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 04:24:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-20 04:24:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 04:24:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-20 04:24:35,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2019-11-20 04:24:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:24:35,344 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-20 04:24:35,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:24:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-20 04:24:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 04:24:35,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:24:35,345 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:24:35,345 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:24:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:24:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1367045227, now seen corresponding path program 1 times [2019-11-20 04:24:35,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:24:35,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109080768] [2019-11-20 04:24:35,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:24:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:24:35,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109080768] [2019-11-20 04:24:35,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765498180] [2019-11-20 04:24:35,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:24:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:24:35,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:24:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:24:35,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:24:35,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-20 04:24:35,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318098306] [2019-11-20 04:24:35,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:24:35,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:24:35,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:24:35,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:24:35,515 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2019-11-20 04:24:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:24:35,539 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-20 04:24:35,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 04:24:35,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-20 04:24:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:24:35,540 INFO L225 Difference]: With dead ends: 43 [2019-11-20 04:24:35,540 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 04:24:35,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:24:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 04:24:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-20 04:24:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 04:24:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-20 04:24:35,546 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-20 04:24:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:24:35,546 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-20 04:24:35,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:24:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-20 04:24:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:24:35,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:24:35,548 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:24:35,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:24:35,752 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:24:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:24:35,752 INFO L82 PathProgramCache]: Analyzing trace with hash 980561436, now seen corresponding path program 1 times [2019-11-20 04:24:35,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:24:35,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040334603] [2019-11-20 04:24:35,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:24:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:24:35,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040334603] [2019-11-20 04:24:35,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383271596] [2019-11-20 04:24:35,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:24:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:24:35,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:24:35,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:24:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 04:24:35,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:24:35,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2019-11-20 04:24:35,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073721560] [2019-11-20 04:24:35,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 04:24:35,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:24:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 04:24:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:24:35,957 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-11-20 04:24:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:24:36,003 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-20 04:24:36,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 04:24:36,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-20 04:24:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:24:36,004 INFO L225 Difference]: With dead ends: 34 [2019-11-20 04:24:36,004 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 04:24:36,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:24:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 04:24:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 04:24:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 04:24:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 04:24:36,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-11-20 04:24:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:24:36,006 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:24:36,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 04:24:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 04:24:36,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 04:24:36,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:24:36,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 04:24:36,259 INFO L444 ceAbstractionStarter]: For program point L622-2(lines 622 627) no Hoare annotation was computed. [2019-11-20 04:24:36,259 INFO L440 ceAbstractionStarter]: At program point L622-3(lines 622 627) the Hoare annotation is: (and (<= 2 ULTIMATE.start_main_~len~0) (<= 1 ULTIMATE.start_main_~i~0)) [2019-11-20 04:24:36,259 INFO L444 ceAbstractionStarter]: For program point L622-4(lines 622 627) no Hoare annotation was computed. [2019-11-20 04:24:36,260 INFO L444 ceAbstractionStarter]: For program point L606(lines 1 632) no Hoare annotation was computed. [2019-11-20 04:24:36,260 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 04:24:36,260 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 04:24:36,260 INFO L447 ceAbstractionStarter]: At program point L631(lines 613 632) the Hoare annotation is: true [2019-11-20 04:24:36,260 INFO L440 ceAbstractionStarter]: At program point L590(lines 574 591) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~len~0) [2019-11-20 04:24:36,260 INFO L440 ceAbstractionStarter]: At program point L607-2(lines 607 610) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~len~0) [2019-11-20 04:24:36,260 INFO L444 ceAbstractionStarter]: For program point L607-3(lines 607 610) no Hoare annotation was computed. [2019-11-20 04:24:36,260 INFO L444 ceAbstractionStarter]: For program point L624(lines 624 626) no Hoare annotation was computed. [2019-11-20 04:24:36,261 INFO L440 ceAbstractionStarter]: At program point L600-2(lines 600 603) the Hoare annotation is: false [2019-11-20 04:24:36,261 INFO L444 ceAbstractionStarter]: For program point L600-3(lines 600 603) no Hoare annotation was computed. [2019-11-20 04:24:36,261 INFO L440 ceAbstractionStarter]: At program point L625(lines 613 632) the Hoare annotation is: false [2019-11-20 04:24:36,261 INFO L444 ceAbstractionStarter]: For program point L592(lines 592 598) no Hoare annotation was computed. [2019-11-20 04:24:36,261 INFO L444 ceAbstractionStarter]: For program point L584(lines 584 586) no Hoare annotation was computed. [2019-11-20 04:24:36,261 INFO L444 ceAbstractionStarter]: For program point L584-2(lines 584 586) no Hoare annotation was computed. [2019-11-20 04:24:36,261 INFO L440 ceAbstractionStarter]: At program point L576-2(lines 576 589) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~len~0) [2019-11-20 04:24:36,261 INFO L444 ceAbstractionStarter]: For program point L576-3(lines 576 589) no Hoare annotation was computed. [2019-11-20 04:24:36,262 INFO L447 ceAbstractionStarter]: At program point L593-2(lines 593 597) the Hoare annotation is: true [2019-11-20 04:24:36,262 INFO L440 ceAbstractionStarter]: At program point L618-2(lines 618 621) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~len~0) [2019-11-20 04:24:36,262 INFO L444 ceAbstractionStarter]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2019-11-20 04:24:36,262 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 04:24:36,262 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 630) no Hoare annotation was computed. [2019-11-20 04:24:36,262 INFO L444 ceAbstractionStarter]: For program point L578(lines 578 580) no Hoare annotation was computed. [2019-11-20 04:24:36,262 INFO L444 ceAbstractionStarter]: For program point L578-1(lines 578 580) no Hoare annotation was computed. [2019-11-20 04:24:36,263 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 04:24:36,263 INFO L447 ceAbstractionStarter]: At program point L562(line 562) the Hoare annotation is: true [2019-11-20 04:24:36,263 INFO L440 ceAbstractionStarter]: At program point L604(lines 599 605) the Hoare annotation is: false [2019-11-20 04:24:36,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:24:36 BoogieIcfgContainer [2019-11-20 04:24:36,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:24:36,279 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:24:36,279 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:24:36,280 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:24:36,280 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:24:34" (3/4) ... [2019-11-20 04:24:36,285 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 04:24:36,298 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-20 04:24:36,299 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 04:24:36,299 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 04:24:36,371 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6b31918d-5bdc-40ed-ac8e-e392af6ea383/bin/uautomizer/witness.graphml [2019-11-20 04:24:36,371 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:24:36,373 INFO L168 Benchmark]: Toolchain (without parser) took 2484.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 939.3 MB in the beginning and 987.9 MB in the end (delta: -48.5 MB). Peak memory consumption was 89.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:24:36,373 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:24:36,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:24:36,375 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 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. [2019-11-20 04:24:36,375 INFO L168 Benchmark]: Boogie Preprocessor took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:24:36,375 INFO L168 Benchmark]: RCFGBuilder took 427.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-20 04:24:36,376 INFO L168 Benchmark]: TraceAbstraction took 1347.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 993.2 MB in the end (delta: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. [2019-11-20 04:24:36,376 INFO L168 Benchmark]: Witness Printer took 92.03 ms. Allocated memory is still 1.2 GB. Free memory was 993.2 MB in the beginning and 987.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:24:36,379 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 539.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 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. * Boogie Preprocessor took 32.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 427.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1347.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 993.2 MB in the end (delta: 88.7 MB). Peak memory consumption was 88.7 MB. Max. memory is 11.5 GB. * Witness Printer took 92.03 ms. Allocated memory is still 1.2 GB. Free memory was 993.2 MB in the beginning and 987.9 MB 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: - PositiveResult [Line: 630]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 574]: Loop Invariant Derived loop invariant: 2 <= len - InvariantResult [Line: 576]: Loop Invariant Derived loop invariant: 2 <= len - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: 2 <= len - InvariantResult [Line: 607]: Loop Invariant Derived loop invariant: 2 <= len - InvariantResult [Line: 562]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 613]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 599]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 613]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 600]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 622]: Loop Invariant Derived loop invariant: 2 <= len && 1 <= i - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: SAFE, OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 33 SDslu, 108 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 23 NumberOfFragments, 25 HoareAnnotationTreeSize, 11 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 4491 SizeOfPredicates, 5 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 9/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...