./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 ccae6f392e1d87c0b193f39dee91a5c51306cb93 ................................................................................................................................................................................................................................................................................... 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/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 ccae6f392e1d87c0b193f39dee91a5c51306cb93 .......................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:23:01,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:01,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:01,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:01,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:01,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:01,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:01,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:01,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:01,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:01,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:01,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:01,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:01,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:01,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:01,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:01,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:01,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:01,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:01,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:01,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:01,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:01,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:01,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:01,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:01,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:01,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:01,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:01,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:01,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:01,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:01,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:01,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:01,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:01,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:01,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:01,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:01,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:01,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:01,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:01,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:01,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:23:01,670 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:01,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:01,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:01,671 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:01,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:01,671 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:23:01,672 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:01,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:01,673 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:23:01,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:23:01,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:23:01,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:01,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:01,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:01,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:01,675 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:23:01,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:01,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:01,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:01,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:01,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:01,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:01,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:01,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:01,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:01,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:01,676 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:23:01,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:23:01,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:01,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:01,677 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/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-10-22 11:23:01,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:01,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:01,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:01,715 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:01,715 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:01,716 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:01,763 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/4b91b30b0/fcf118b3ef424f8d8287af2aff9c94f1/FLAGbe5c32c08 [2019-10-22 11:23:02,114 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:02,115 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:02,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/4b91b30b0/fcf118b3ef424f8d8287af2aff9c94f1/FLAGbe5c32c08 [2019-10-22 11:23:02,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/4b91b30b0/fcf118b3ef424f8d8287af2aff9c94f1 [2019-10-22 11:23:02,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:02,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:02,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:02,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:02,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:02,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7464cab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02, skipping insertion in model container [2019-10-22 11:23:02,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,146 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:02,165 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:02,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:02,316 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:02,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:02,432 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:02,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02 WrapperNode [2019-10-22 11:23:02,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:02,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:02,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:02,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:02,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:02,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:02,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:02,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:02,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... [2019-10-22 11:23:02,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:02,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:02,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:02,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:02,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 [2019-10-22 11:23:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-10-22 11:23:02,553 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-10-22 11:23:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:02,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:02,720 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:02,721 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:23:02,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:02 BoogieIcfgContainer [2019-10-22 11:23:02,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:02,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:02,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:02,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:02" (1/3) ... [2019-10-22 11:23:02,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c20de87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:02, skipping insertion in model container [2019-10-22 11:23:02,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:02" (2/3) ... [2019-10-22 11:23:02,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c20de87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:02, skipping insertion in model container [2019-10-22 11:23:02,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:02" (3/3) ... [2019-10-22 11:23:02,729 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:02,736 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:02,742 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:02,751 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:02,770 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:02,770 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:02,770 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:02,770 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:02,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:02,770 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:02,770 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:02,770 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 11:23:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 11:23:02,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:02,789 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:02,790 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-10-22 11:23:02,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:02,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610245791] [2019-10-22 11:23:02,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:02,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:02,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:03,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610245791] [2019-10-22 11:23:03,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735040963] [2019-10-22 11:23:03,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 [2019-10-22 11:23:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:03,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:23:03,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:03,175 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:03,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1769152167] [2019-10-22 11:23:03,248 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 17 [2019-10-22 11:23:03,277 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:23:03,277 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:23:03,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:03,548 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) 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.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) 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.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) 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) [2019-10-22 11:23:03,552 INFO L168 Benchmark]: Toolchain (without parser) took 1419.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -123.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:03,553 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:03,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -189.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:03,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.28 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. [2019-10-22 11:23:03,554 INFO L168 Benchmark]: Boogie Preprocessor took 22.38 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. [2019-10-22 11:23:03,555 INFO L168 Benchmark]: RCFGBuilder took 233.63 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:03,555 INFO L168 Benchmark]: TraceAbstraction took 827.47 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: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:03,558 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 963.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -189.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.28 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. * Boogie Preprocessor took 22.38 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 233.63 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 827.47 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: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:23:05,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:05,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:05,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:05,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:05,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:05,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:05,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:05,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:05,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:05,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:05,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:05,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:05,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:05,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:05,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:05,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:05,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:05,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:05,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:05,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:05,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:05,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:05,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:05,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:05,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:05,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:05,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:05,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:05,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:05,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:05,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:05,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:05,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:05,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:05,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:05,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:05,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:05,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:05,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:05,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:05,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:23:05,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:05,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:05,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:05,643 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:05,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:05,643 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:05,643 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:05,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:05,643 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:05,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:05,644 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:23:05,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:23:05,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:05,646 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:23:05,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:05,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:05,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:05,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:05,648 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:23:05,648 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:23:05,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:05,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:05,648 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/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-10-22 11:23:05,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:05,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:05,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:05,693 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:05,693 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:05,693 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:05,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/124104fa8/f9bfc32ef85842eb9a56e7d1cadbddf7/FLAG508bbb9e6 [2019-10-22 11:23:06,121 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:06,122 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:06,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/124104fa8/f9bfc32ef85842eb9a56e7d1cadbddf7/FLAG508bbb9e6 [2019-10-22 11:23:06,142 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/data/124104fa8/f9bfc32ef85842eb9a56e7d1cadbddf7 [2019-10-22 11:23:06,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:06,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:06,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:06,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:06,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:06,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1858fe62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06, skipping insertion in model container [2019-10-22 11:23:06,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,167 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:06,181 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:06,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:06,333 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:06,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:06,362 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:06,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06 WrapperNode [2019-10-22 11:23:06,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:06,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:06,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:06,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:06,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:06,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:06,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:06,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:06,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... [2019-10-22 11:23:06,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:06,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:06,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:06,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:06,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 [2019-10-22 11:23:06,502 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-10-22 11:23:06,502 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-10-22 11:23:06,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:06,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:06,637 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:06,638 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:23:06,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:06 BoogieIcfgContainer [2019-10-22 11:23:06,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:06,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:06,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:06,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:06,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:06" (1/3) ... [2019-10-22 11:23:06,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce79216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:06, skipping insertion in model container [2019-10-22 11:23:06,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:06" (2/3) ... [2019-10-22 11:23:06,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce79216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:06, skipping insertion in model container [2019-10-22 11:23:06,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:06" (3/3) ... [2019-10-22 11:23:06,645 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-10-22 11:23:06,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:06,661 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:23:06,671 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:23:06,693 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:06,693 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:06,693 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:06,693 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:06,693 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:06,693 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:06,694 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:06,694 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 11:23:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 11:23:06,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:06,715 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:06,717 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-10-22 11:23:06,732 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:06,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1254851826] [2019-10-22 11:23:06,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:06,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:23:06,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:06,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:06,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254851826] [2019-10-22 11:23:06,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905125088] [2019-10-22 11:23:06,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/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 [2019-10-22 11:23:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:23:06,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:23:06,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:23:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:06,978 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:23:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:23:07,012 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:23:07,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 6 [2019-10-22 11:23:07,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500408975] [2019-10-22 11:23:07,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:23:07,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:23:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:23:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:23:07,032 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2019-10-22 11:23:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:23:07,142 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-10-22 11:23:07,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:23:07,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-22 11:23:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:23:07,152 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:23:07,153 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:23:07,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:23:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:23:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:23:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:23:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-22 11:23:07,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-10-22 11:23:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:23:07,192 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-22 11:23:07,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:23:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-22 11:23:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-22 11:23:07,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:07,195 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:23:07,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:23:07,596 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:23:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2019-10-22 11:23:07,597 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:23:07,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1268761865] [2019-10-22 11:23:07,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:07,679 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:23:07,679 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:23:07,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:23:07,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:23:07 BoogieIcfgContainer [2019-10-22 11:23:07,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:23:07,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:23:07,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:23:07,913 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:23:07,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:06" (3/4) ... [2019-10-22 11:23:07,916 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:23:07,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_79c3459a-e10a-40ca-9262-1008c6cc0c8c/bin/utaipan/witness.graphml [2019-10-22 11:23:07,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:23:07,962 INFO L168 Benchmark]: Toolchain (without parser) took 1813.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -105.4 MB). Peak memory consumption was 44.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:07,962 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:07,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.81 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 937.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:07,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.42 ms. Allocated memory is still 1.0 GB. Free memory is still 937.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:07,963 INFO L168 Benchmark]: Boogie Preprocessor took 68.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -208.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:07,964 INFO L168 Benchmark]: RCFGBuilder took 182.14 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:07,964 INFO L168 Benchmark]: TraceAbstraction took 1272.91 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: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:07,965 INFO L168 Benchmark]: Witness Printer took 46.96 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. [2019-10-22 11:23:07,967 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.81 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 937.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.42 ms. Allocated memory is still 1.0 GB. Free memory is still 937.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 68.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -208.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 182.14 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1272.91 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: 74.5 MB). Peak memory consumption was 74.5 MB. Max. memory is 11.5 GB. * Witness Printer took 46.96 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [g=0] [L28] CALL A(g,h) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, a1=2, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, A(a2,a1)=3, a1=2, a2=0, g=2] [L28] RET A(g,h) VAL [g=2] [L29] CALL A(g,h) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, g=2] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, a1=2, a2=0, g=2] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, g=2] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, A(a2,a1)=5, a1=2, a2=0, g=2] [L29] RET A(g,h) VAL [g=2] [L30] COND TRUE \read(g) VAL [g=2] [L31] __VERIFIER_error() VAL [g=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 9 SDslu, 35 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 1890 SizeOfPredicates, 4 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 4 InterpolantComputations, 0 PerfectInterpolantSequences, 4/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...