./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 dd9e7bf35989cde866740706d77fd71a632fd664 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 dd9e7bf35989cde866740706d77fd71a632fd664 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:46:44,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:46:44,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:46:44,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:46:44,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:46:44,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:46:44,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:46:44,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:46:44,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:46:44,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:46:44,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:46:44,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:46:44,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:46:44,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:46:44,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:46:44,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:46:44,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:46:44,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:46:44,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:46:44,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:46:44,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:46:44,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:46:44,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:46:44,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:46:44,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:46:44,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:46:44,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:46:44,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:46:44,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:46:44,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:46:44,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:46:44,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:46:44,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:46:44,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:46:44,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:46:44,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:46:44,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:46:44,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:46:44,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:46:44,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:46:44,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:46:44,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 11:46:44,588 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:46:44,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:46:44,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:46:44,589 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:46:44,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:46:44,589 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:46:44,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 11:46:44,589 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:46:44,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:46:44,590 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 11:46:44,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 11:46:44,590 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:46:44,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 11:46:44,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 11:46:44,591 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 11:46:44,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:46:44,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:46:44,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:46:44,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:46:44,593 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:46:44,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:46:44,593 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:46:44,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:46:44,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:46:44,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:46:44,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:46:44,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:46:44,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:46:44,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:46:44,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:46:44,596 INFO L138 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/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 -> dd9e7bf35989cde866740706d77fd71a632fd664 [2019-12-07 11:46:44,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:46:44,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:46:44,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:46:44,704 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:46:44,705 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:46:44,705 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-12-07 11:46:44,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/ef54699ac/6b7fbedbf130454496ad2405c6ff0245/FLAGc50510c5a [2019-12-07 11:46:45,164 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:46:45,165 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-12-07 11:46:45,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/ef54699ac/6b7fbedbf130454496ad2405c6ff0245/FLAGc50510c5a [2019-12-07 11:46:45,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/ef54699ac/6b7fbedbf130454496ad2405c6ff0245 [2019-12-07 11:46:45,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:46:45,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:46:45,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:46:45,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:46:45,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:46:45,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343612d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45, skipping insertion in model container [2019-12-07 11:46:45,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:46:45,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:46:45,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:46:45,789 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:46:45,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:46:45,851 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:46:45,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45 WrapperNode [2019-12-07 11:46:45,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:46:45,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:46:45,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:46:45,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:46:45,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:46:45,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:46:45,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:46:45,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:46:45,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... [2019-12-07 11:46:45,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:46:45,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:46:45,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:46:45,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:46:45,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 [2019-12-07 11:46:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:46:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 11:46:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 11:46:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 11:46:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 11:46:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:46:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:46:45,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:46:46,210 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:46:46,211 INFO L287 CfgBuilder]: Removed 22 assume(true) statements. [2019-12-07 11:46:46,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:46:46 BoogieIcfgContainer [2019-12-07 11:46:46,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:46:46,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:46:46,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:46:46,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:46:46,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:46:45" (1/3) ... [2019-12-07 11:46:46,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab78686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:46:46, skipping insertion in model container [2019-12-07 11:46:46,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:45" (2/3) ... [2019-12-07 11:46:46,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab78686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:46:46, skipping insertion in model container [2019-12-07 11:46:46,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:46:46" (3/3) ... [2019-12-07 11:46:46,216 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-12-07 11:46:46,223 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:46:46,227 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:46:46,235 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:46:46,250 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:46:46,250 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:46:46,250 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:46:46,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:46:46,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:46:46,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:46:46,250 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:46:46,250 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:46:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-12-07 11:46:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:46:46,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:46,263 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:46,263 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1872792383, now seen corresponding path program 1 times [2019-12-07 11:46:46,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:46,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796050999] [2019-12-07 11:46:46,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:46:46,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796050999] [2019-12-07 11:46:46,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:46:46,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:46:46,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209095927] [2019-12-07 11:46:46,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:46:46,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:46,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:46:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:46:46,391 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2019-12-07 11:46:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:46,431 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2019-12-07 11:46:46,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:46:46,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 11:46:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:46,439 INFO L225 Difference]: With dead ends: 29 [2019-12-07 11:46:46,439 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 11:46:46,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:46:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 11:46:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2019-12-07 11:46:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 11:46:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2019-12-07 11:46:46,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2019-12-07 11:46:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:46,463 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-12-07 11:46:46,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:46:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2019-12-07 11:46:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:46:46,463 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:46,463 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:46,464 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2000945798, now seen corresponding path program 1 times [2019-12-07 11:46:46,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:46,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51507733] [2019-12-07 11:46:46,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:46:46,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51507733] [2019-12-07 11:46:46,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357665488] [2019-12-07 11:46:46,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/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 [2019-12-07 11:46:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:46,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:46:46,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:46:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:46:46,599 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:46:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:46:46,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:46:46,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 9 [2019-12-07 11:46:46,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950921692] [2019-12-07 11:46:46,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:46:46,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:46:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:46:46,623 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 4 states. [2019-12-07 11:46:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:46,643 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2019-12-07 11:46:46,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:46:46,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 11:46:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:46,643 INFO L225 Difference]: With dead ends: 22 [2019-12-07 11:46:46,644 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 11:46:46,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:46:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 11:46:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 11:46:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 11:46:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-12-07 11:46:46,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2019-12-07 11:46:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:46,647 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-12-07 11:46:46,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:46:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-12-07 11:46:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 11:46:46,648 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:46,648 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:46,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:46,849 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -634899168, now seen corresponding path program 1 times [2019-12-07 11:46:46,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:46,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022262752] [2019-12-07 11:46:46,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:46:46,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022262752] [2019-12-07 11:46:46,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607692594] [2019-12-07 11:46:46,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/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 [2019-12-07 11:46:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:47,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:46:47,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:46:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:46:47,081 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:46:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:46:47,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:46:47,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 9 [2019-12-07 11:46:47,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145537229] [2019-12-07 11:46:47,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:46:47,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:46:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:46:47,102 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 5 states. [2019-12-07 11:46:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:47,144 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-12-07 11:46:47,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:46:47,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 11:46:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:47,145 INFO L225 Difference]: With dead ends: 28 [2019-12-07 11:46:47,145 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 11:46:47,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:46:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 11:46:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2019-12-07 11:46:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 11:46:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-12-07 11:46:47,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 13 [2019-12-07 11:46:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:47,150 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-12-07 11:46:47,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:46:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-12-07 11:46:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:46:47,151 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:47,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:47,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:47,352 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -377943627, now seen corresponding path program 1 times [2019-12-07 11:46:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:47,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977688208] [2019-12-07 11:46:47,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 11:46:47,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977688208] [2019-12-07 11:46:47,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860827920] [2019-12-07 11:46:47,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:47,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:46:47,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:46:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:46:47,542 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:46:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:46:47,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679338376] [2019-12-07 11:46:47,571 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:46:47,572 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:46:47,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:46:47,582 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:46:47,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:46:47,732 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:47,957 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:48,238 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:48,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:48,740 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:49,052 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:49,296 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:49,383 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:49,660 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:46:49,985 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2019-12-07 11:46:50,309 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-12-07 11:46:50,636 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2019-12-07 11:46:50,922 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2019-12-07 11:46:50,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:46:50,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 4, 4] total 16 [2019-12-07 11:46:50,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71734365] [2019-12-07 11:46:50,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:46:50,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:50,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:46:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:46:50,925 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 8 states. [2019-12-07 11:46:51,491 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-12-07 11:46:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:51,610 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-12-07 11:46:51,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:46:51,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 11:46:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:51,611 INFO L225 Difference]: With dead ends: 31 [2019-12-07 11:46:51,612 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:46:51,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:46:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:46:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2019-12-07 11:46:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 11:46:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 11:46:51,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 14 [2019-12-07 11:46:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:51,620 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 11:46:51,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:46:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 11:46:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 11:46:51,621 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:51,621 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:51,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:51,822 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1167083374, now seen corresponding path program 1 times [2019-12-07 11:46:51,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:51,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860935227] [2019-12-07 11:46:51,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:46:51,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860935227] [2019-12-07 11:46:51,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559870349] [2019-12-07 11:46:51,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:51,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:46:51,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:46:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 11:46:51,923 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:46:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 11:46:51,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087168898] [2019-12-07 11:46:51,929 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:46:51,929 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:46:51,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:46:51,930 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:46:51,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:46:51,976 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:52,131 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:52,352 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:52,572 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:52,623 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:52,957 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:53,194 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:53,261 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 11:46:53,541 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 11:46:53,696 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-12-07 11:46:54,038 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2019-12-07 11:46:54,352 WARN L192 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2019-12-07 11:46:54,514 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2019-12-07 11:46:54,880 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2019-12-07 11:46:55,176 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-12-07 11:46:55,354 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-12-07 11:46:55,356 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 11:46:55,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 11:46:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2019-12-07 11:46:55,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357197323] [2019-12-07 11:46:55,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:46:55,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:46:55,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:46:55,358 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2019-12-07 11:46:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:46:55,410 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-12-07 11:46:55,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:46:55,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-12-07 11:46:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:46:55,411 INFO L225 Difference]: With dead ends: 31 [2019-12-07 11:46:55,411 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 11:46:55,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:46:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 11:46:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-12-07 11:46:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 11:46:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-12-07 11:46:55,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 15 [2019-12-07 11:46:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:46:55,415 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-12-07 11:46:55,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:46:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-12-07 11:46:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 11:46:55,416 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:46:55,416 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:46:55,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:55,617 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:46:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:46:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1043804537, now seen corresponding path program 2 times [2019-12-07 11:46:55,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 11:46:55,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978666742] [2019-12-07 11:46:55,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:46:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:46:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:46:56,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978666742] [2019-12-07 11:46:56,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011901928] [2019-12-07 11:46:56,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:56,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 11:46:56,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:46:56,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 93 conjunts are in the unsatisfiable core [2019-12-07 11:46:56,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:46:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:46:56,448 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:46:57,022 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2019-12-07 11:46:57,322 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6c212a4d [2019-12-07 11:46:57,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605424720] [2019-12-07 11:46:57,323 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 11:46:57,323 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 11:46:57,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 11:46:57,324 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 11:46:57,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 11:46:57,331 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6c212a4d at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:91) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:555) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:428) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:234) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 11:46:57,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:46:57,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-12-07 11:46:57,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806483487] [2019-12-07 11:46:57,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 11:46:57,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 11:46:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 11:46:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2019-12-07 11:46:57,333 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 16 states. [2019-12-07 11:46:57,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:46:57,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:46:57,535 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6c212a4d at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 11:46:57,539 INFO L168 Benchmark]: Toolchain (without parser) took 12007.75 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 335.0 MB). Free memory was 934.0 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 118.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:57,539 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:46:57,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -184.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:57,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.78 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. [2019-12-07 11:46:57,541 INFO L168 Benchmark]: Boogie Preprocessor took 20.48 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. [2019-12-07 11:46:57,541 INFO L168 Benchmark]: RCFGBuilder took 308.34 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: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:57,542 INFO L168 Benchmark]: TraceAbstraction took 11325.44 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 194.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -76.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:46:57,544 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 318.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -184.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.78 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 20.48 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 308.34 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: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11325.44 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 194.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -76.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6c212a4d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6c212a4d: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 11:46:58,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:46:58,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:46:58,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:46:58,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:46:58,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:46:58,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:46:58,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:46:58,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:46:58,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:46:58,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:46:58,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:46:58,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:46:58,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:46:58,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:46:58,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:46:58,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:46:58,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:46:58,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:46:58,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:46:58,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:46:58,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:46:58,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:46:58,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:46:58,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:46:58,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:46:58,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:46:58,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:46:58,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:46:58,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:46:58,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:46:58,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:46:58,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:46:58,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:46:58,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:46:58,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:46:58,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:46:58,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:46:58,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:46:58,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:46:58,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:46:58,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 11:46:58,931 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:46:58,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:46:58,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 11:46:58,932 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 11:46:58,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 11:46:58,932 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 11:46:58,932 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 11:46:58,932 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 11:46:58,932 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 11:46:58,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:46:58,933 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:46:58,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:46:58,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:46:58,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:46:58,934 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:46:58,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:46:58,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:46:58,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:46:58,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:46:58,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:46:58,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:46:58,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:46:58,936 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 -> dd9e7bf35989cde866740706d77fd71a632fd664 [2019-12-07 11:46:59,101 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:46:59,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:46:59,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:46:59,116 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:46:59,116 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:46:59,117 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-12-07 11:46:59,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/c02c9c79a/a48dd0791f4f4acaa1f8b76a18e30efa/FLAG2feef3efc [2019-12-07 11:46:59,641 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:46:59,641 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-12-07 11:46:59,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/c02c9c79a/a48dd0791f4f4acaa1f8b76a18e30efa/FLAG2feef3efc [2019-12-07 11:46:59,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/data/c02c9c79a/a48dd0791f4f4acaa1f8b76a18e30efa [2019-12-07 11:46:59,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:46:59,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:46:59,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:46:59,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:46:59,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:46:59,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:46:59" (1/1) ... [2019-12-07 11:46:59,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c6fdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:46:59, skipping insertion in model container [2019-12-07 11:46:59,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:46:59" (1/1) ... [2019-12-07 11:46:59,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:46:59,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:46:59,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:46:59,928 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:46:59,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:47:00,000 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:47:00,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00 WrapperNode [2019-12-07 11:47:00,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:47:00,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:47:00,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:47:00,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:47:00,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:47:00,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:47:00,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:47:00,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:47:00,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... [2019-12-07 11:47:00,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:47:00,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:47:00,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:47:00,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:47:00,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/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 [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 11:47:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:47:00,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:47:00,327 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:47:00,328 INFO L287 CfgBuilder]: Removed 22 assume(true) statements. [2019-12-07 11:47:00,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:47:00 BoogieIcfgContainer [2019-12-07 11:47:00,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:47:00,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:47:00,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:47:00,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:47:00,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:46:59" (1/3) ... [2019-12-07 11:47:00,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daf887a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:47:00, skipping insertion in model container [2019-12-07 11:47:00,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:47:00" (2/3) ... [2019-12-07 11:47:00,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daf887a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:47:00, skipping insertion in model container [2019-12-07 11:47:00,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:47:00" (3/3) ... [2019-12-07 11:47:00,333 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-12-07 11:47:00,339 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:47:00,344 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:47:00,351 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:47:00,365 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:47:00,365 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:47:00,365 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:47:00,365 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:47:00,365 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:47:00,365 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:47:00,365 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:47:00,365 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:47:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-12-07 11:47:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 11:47:00,378 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:00,378 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:00,379 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1121238131, now seen corresponding path program 1 times [2019-12-07 11:47:00,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:00,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943031461] [2019-12-07 11:47:00,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:00,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 11:47:00,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:47:00,471 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:47:00,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943031461] [2019-12-07 11:47:00,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:00,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 11:47:00,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924707452] [2019-12-07 11:47:00,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 11:47:00,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:47:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 11:47:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:47:00,489 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-12-07 11:47:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:47:00,503 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2019-12-07 11:47:00,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:47:00,505 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-12-07 11:47:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:47:00,513 INFO L225 Difference]: With dead ends: 50 [2019-12-07 11:47:00,513 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 11:47:00,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 11:47:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 11:47:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 11:47:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 11:47:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 11:47:00,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2019-12-07 11:47:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:47:00,541 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 11:47:00,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 11:47:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 11:47:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 11:47:00,542 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:00,542 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:00,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 11:47:00,743 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:00,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1860179837, now seen corresponding path program 1 times [2019-12-07 11:47:00,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:00,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69451954] [2019-12-07 11:47:00,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:00,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:47:00,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:47:00,841 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:47:00,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69451954] [2019-12-07 11:47:00,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:00,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 11:47:00,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248835024] [2019-12-07 11:47:00,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:47:00,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:47:00,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:47:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:47:00,854 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-12-07 11:47:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:47:00,875 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-12-07 11:47:00,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:47:00,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 11:47:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:47:00,876 INFO L225 Difference]: With dead ends: 43 [2019-12-07 11:47:00,876 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:47:00,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:47:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:47:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 11:47:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:47:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-12-07 11:47:00,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2019-12-07 11:47:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:47:00,881 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-12-07 11:47:00,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:47:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-12-07 11:47:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 11:47:00,882 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:00,882 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:01,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 11:47:01,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash -650193283, now seen corresponding path program 1 times [2019-12-07 11:47:01,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:01,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589099339] [2019-12-07 11:47:01,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:01,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 11:47:01,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 11:47:01,194 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 11:47:01,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589099339] [2019-12-07 11:47:01,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:01,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 11:47:01,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138596440] [2019-12-07 11:47:01,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:47:01,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:47:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:47:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:47:01,213 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-12-07 11:47:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:47:01,268 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2019-12-07 11:47:01,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:47:01,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-12-07 11:47:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:47:01,269 INFO L225 Difference]: With dead ends: 51 [2019-12-07 11:47:01,269 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 11:47:01,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:47:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 11:47:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-12-07 11:47:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 11:47:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-12-07 11:47:01,275 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2019-12-07 11:47:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:47:01,276 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-12-07 11:47:01,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:47:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-12-07 11:47:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 11:47:01,277 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:01,277 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:01,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 11:47:01,477 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash 218280017, now seen corresponding path program 1 times [2019-12-07 11:47:01,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:01,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160554335] [2019-12-07 11:47:01,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:01,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:47:01,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:47:01,614 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 11:47:01,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160554335] [2019-12-07 11:47:01,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:01,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-12-07 11:47:01,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096242414] [2019-12-07 11:47:01,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:47:01,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:47:01,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:47:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:47:01,656 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2019-12-07 11:47:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:47:01,723 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-12-07 11:47:01,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:47:01,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-12-07 11:47:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:47:01,724 INFO L225 Difference]: With dead ends: 58 [2019-12-07 11:47:01,724 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 11:47:01,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:47:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 11:47:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2019-12-07 11:47:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 11:47:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-12-07 11:47:01,730 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 31 [2019-12-07 11:47:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:47:01,731 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-12-07 11:47:01,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:47:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-12-07 11:47:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 11:47:01,732 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:01,732 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:01,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 11:47:01,933 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1177402658, now seen corresponding path program 1 times [2019-12-07 11:47:01,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:01,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993268629] [2019-12-07 11:47:01,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:02,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:47:02,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 11:47:02,097 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 11:47:02,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993268629] [2019-12-07 11:47:02,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:02,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-12-07 11:47:02,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926044755] [2019-12-07 11:47:02,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:47:02,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 11:47:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:47:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:47:02,136 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2019-12-07 11:47:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:47:02,195 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-12-07 11:47:02,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:47:02,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-12-07 11:47:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:47:02,196 INFO L225 Difference]: With dead ends: 51 [2019-12-07 11:47:02,196 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 11:47:02,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:47:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 11:47:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-12-07 11:47:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 11:47:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-12-07 11:47:02,202 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2019-12-07 11:47:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:47:02,203 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-12-07 11:47:02,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:47:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-12-07 11:47:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 11:47:02,204 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:47:02,204 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:47:02,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 11:47:02,405 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:47:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:47:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2088089927, now seen corresponding path program 1 times [2019-12-07 11:47:02,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 11:47:02,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238590871] [2019-12-07 11:47:02,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 11:47:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:02,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjunts are in the unsatisfiable core [2019-12-07 11:47:02,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:02,612 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 11:47:02,612 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,618 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,619 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,619 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 11:47:02,662 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,662 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-12-07 11:47:02,663 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,669 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,670 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,670 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2019-12-07 11:47:02,703 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 11:47:02,703 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,715 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,719 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 11:47:02,719 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,728 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,728 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,729 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-12-07 11:47:02,926 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_26|], 6=[|v_#memory_$Pointer$.base_28|, |v_#memory_$Pointer$.offset_28|]} [2019-12-07 11:47:02,931 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2019-12-07 11:47:02,932 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,967 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,971 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:47:02,973 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:47:02,974 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 84 [2019-12-07 11:47:02,975 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:02,994 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:02,997 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:47:02,998 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2019-12-07 11:47:02,999 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,012 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,013 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,013 INFO L239 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:142, output treesize:40 [2019-12-07 11:47:03,155 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2019-12-07 11:47:03,156 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,199 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,205 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:47:03,206 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2019-12-07 11:47:03,207 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,229 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,235 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:47:03,236 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-12-07 11:47:03,236 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,257 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,257 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,257 INFO L239 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:81, output treesize:40 [2019-12-07 11:47:03,495 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2019-12-07 11:47:03,495 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,508 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 11:47:03,512 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,522 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,523 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:03,523 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:52, output treesize:22 [2019-12-07 11:47:03,589 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2019-12-07 11:47:03,590 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:03,607 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:03,607 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:03,608 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:15 [2019-12-07 11:47:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:47:03,762 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:47:04,220 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:04,245 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:04,247 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:04,254 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:04,254 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:04,254 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:47 [2019-12-07 11:47:06,819 INFO L430 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_31|, |v_#memory_$Pointer$.offset_31|], 2=[|#memory_int|]} [2019-12-07 11:47:06,821 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:06,858 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:06,860 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:47:06,872 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:06,876 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 286 [2019-12-07 11:47:06,877 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:47:07,141 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2019-12-07 11:47:07,142 INFO L614 ElimStorePlain]: treesize reduction 93, result has 60.1 percent of original size [2019-12-07 11:47:07,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 11:47:07,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:07,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:07,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:07,150 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-2 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2019-12-07 11:47:07,150 INFO L239 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:86, output treesize:255 [2019-12-07 11:47:07,637 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 57 [2019-12-07 11:47:16,798 WARN L192 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 26 [2019-12-07 11:47:16,798 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:16,799 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 63 [2019-12-07 11:47:16,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:16,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,816 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:47:16,816 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 63 [2019-12-07 11:47:16,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:16,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:16,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:47:16,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:47:16,824 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:47:16,824 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_13], 1=[v_arrayElimCell_12]} [2019-12-07 11:47:16,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238590871] [2019-12-07 11:47:16,830 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@347a54a8 [2019-12-07 11:47:16,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [86897501] [2019-12-07 11:47:16,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 11:47:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:17,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 11:47:17,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:17,025 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@347a54a8 [2019-12-07 11:47:17,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680701585] [2019-12-07 11:47:17,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da2761b5-388c-49d7-8f49-a299dc4533c1/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:47:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:47:17,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 55 conjunts are in the unsatisfiable core [2019-12-07 11:47:17,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:47:17,112 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@347a54a8 [2019-12-07 11:47:17,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:47:17,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 11:47:17,112 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 11:47:17,113 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 11:47:17,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 11:47:17,735 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 11:47:17,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:47:17 BoogieIcfgContainer [2019-12-07 11:47:17,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:47:17,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:47:17,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:47:17,736 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:47:17,736 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:47:00" (3/4) ... [2019-12-07 11:47:17,739 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 11:47:17,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:47:17,740 INFO L168 Benchmark]: Toolchain (without parser) took 18078.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 947.0 MB in the beginning and 971.8 MB in the end (delta: -24.8 MB). Peak memory consumption was 171.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:47:17,740 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:47:17,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -143.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:47:17,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.40 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. [2019-12-07 11:47:17,741 INFO L168 Benchmark]: Boogie Preprocessor took 25.73 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. [2019-12-07 11:47:17,741 INFO L168 Benchmark]: RCFGBuilder took 266.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:47:17,742 INFO L168 Benchmark]: TraceAbstraction took 17406.68 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 971.8 MB in the end (delta: 91.5 MB). Peak memory consumption was 172.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:47:17,742 INFO L168 Benchmark]: Witness Printer took 2.79 ms. Allocated memory is still 1.2 GB. Free memory is still 971.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:47:17,744 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 339.66 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -143.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.73 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 266.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17406.68 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 971.8 MB in the end (delta: 91.5 MB). Peak memory consumption was 172.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.79 ms. Allocated memory is still 1.2 GB. Free memory is still 971.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 619]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L603] const int len = 2; [L604] const int data = 1; [L573] SLL head = ((void *)0); [L574] COND TRUE len > 0 [L564] SLL temp = (SLL) malloc(sizeof(struct node)); [L565] COND FALSE !(((void *)0) == temp) [L568] temp->next = ((void *)0) [L569] temp->data = data [L570] return temp; [L575] SLL new_head = node_create(data); [L576] new_head->next = head [L577] head = new_head [L574] len-- [L574] COND TRUE len > 0 [L564] SLL temp = (SLL) malloc(sizeof(struct node)); [L565] COND FALSE !(((void *)0) == temp) [L568] temp->next = ((void *)0) [L569] temp->data = data [L570] return temp; [L575] SLL new_head = node_create(data); [L576] new_head->next = head [L577] head = new_head [L574] len-- [L574] COND FALSE !(len > 0) [L579] return head; [L605] SLL s = sll_create(len, data); [L606] int i; [L607] i = len - 1 [L607] COND TRUE i >= 0 [L608] int new_data = i + len; [L596] COND TRUE index > 0 [L597] EXPR head->next [L597] head = head->next [L598] index-- [L596] COND FALSE !(index > 0) [L600] head->data = data [L607] i-- [L607] COND TRUE i >= 0 [L608] int new_data = i + len; [L596] COND FALSE !(index > 0) [L600] head->data = data [L607] i-- [L607] COND FALSE !(i >= 0) [L611] i = len - 1 [L611] COND TRUE i >= 0 [L612] int expected = i + len; [L589] COND TRUE index > 0 [L590] EXPR head->next [L590] head = head->next [L591] index-- [L589] COND FALSE !(index > 0) [L593] EXPR head->data [L593] return head->data; [L613] COND TRUE expected != sll_get_data_at(s, i) [L619] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: UNKNOWN, OverallTime: 17.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 173 SDslu, 172 SDs, 0 SdLazy, 75 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, 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, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 17416 SizeOfPredicates, 13 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 70/70 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...