./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_1.i --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_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 43bf08ab7eab650af2134651dc434d79e4859447 ........................................................................................................................................................................................................................................................................................................................ 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_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 43bf08ab7eab650af2134651dc434d79e4859447 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:24:29,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:29,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:29,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:29,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:29,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:29,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:29,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:29,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:29,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:29,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:29,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:29,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:29,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:29,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:29,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:29,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:29,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:29,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:29,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:29,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:29,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:29,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:29,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:29,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:29,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:29,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:29,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:29,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:29,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:29,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:29,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:29,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:29,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:29,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:29,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:29,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:29,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:29,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:29,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:29,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:29,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:24:29,362 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:29,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:29,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:29,363 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:29,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:29,363 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:24:29,364 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:29,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:29,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:29,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:24:29,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:29,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:29,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:29,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:29,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:29,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:29,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:29,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:29,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:29,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:29,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:29,368 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:24:29,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:24:29,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:29,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:29,369 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_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 -> 43bf08ab7eab650af2134651dc434d79e4859447 [2019-10-22 11:24:29,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:29,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:29,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:29,407 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:29,408 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:29,409 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/../../sv-benchmarks/c/loop-new/count_by_1.i [2019-10-22 11:24:29,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/fcf5e128a/6eb6f9a52ab544f08b30dc2b05cc62df/FLAG8208f5a7a [2019-10-22 11:24:29,838 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:29,838 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/sv-benchmarks/c/loop-new/count_by_1.i [2019-10-22 11:24:29,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/fcf5e128a/6eb6f9a52ab544f08b30dc2b05cc62df/FLAG8208f5a7a [2019-10-22 11:24:30,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/fcf5e128a/6eb6f9a52ab544f08b30dc2b05cc62df [2019-10-22 11:24:30,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:30,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:30,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:30,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:30,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:30,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc5bc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30, skipping insertion in model container [2019-10-22 11:24:30,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,281 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:30,293 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:30,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:30,417 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:30,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:30,499 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:30,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30 WrapperNode [2019-10-22 11:24:30,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:30,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:30,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:30,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:30,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:30,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:30,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:30,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:30,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... [2019-10-22 11:24:30,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:30,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:30,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:30,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:30,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 11:24:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:30,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:30,742 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:30,742 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:24:30,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:30 BoogieIcfgContainer [2019-10-22 11:24:30,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:30,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:30,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:30,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:30,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:30" (1/3) ... [2019-10-22 11:24:30,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2561cc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:30, skipping insertion in model container [2019-10-22 11:24:30,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:30" (2/3) ... [2019-10-22 11:24:30,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2561cc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:30, skipping insertion in model container [2019-10-22 11:24:30,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:30" (3/3) ... [2019-10-22 11:24:30,751 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2019-10-22 11:24:30,760 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:30,768 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:30,778 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:30,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:30,797 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:30,797 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:30,797 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:30,797 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:30,797 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:30,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:30,797 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:24:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:24:30,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:30,815 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:24:30,817 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 29776202, now seen corresponding path program 1 times [2019-10-22 11:24:30,830 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:30,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183884315] [2019-10-22 11:24:30,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:30,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183884315] [2019-10-22 11:24:30,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:30,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:24:30,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757739105] [2019-10-22 11:24:30,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:24:30,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:24:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:24:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:24:30,944 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-10-22 11:24:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:30,971 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-10-22 11:24:30,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:24:30,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 11:24:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:30,983 INFO L225 Difference]: With dead ends: 21 [2019-10-22 11:24:30,983 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:24:30,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:24:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:24:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-10-22 11:24:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:24:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 11:24:31,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-10-22 11:24:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:31,016 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 11:24:31,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:24:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 11:24:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:24:31,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:31,017 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:31,017 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1396608660, now seen corresponding path program 1 times [2019-10-22 11:24:31,018 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:31,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49603681] [2019-10-22 11:24:31,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:31,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:31,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:31,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49603681] [2019-10-22 11:24:31,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301655660] [2019-10-22 11:24:31,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 11:24:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:31,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:24:31,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:31,236 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:31,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [134010380] [2019-10-22 11:24:31,258 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 8 [2019-10-22 11:24:31,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:24:31,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:24:31,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:31,542 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 11:24:31,547 INFO L168 Benchmark]: Toolchain (without parser) took 1278.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 947.1 MB in the beginning and 1.1 GB in the end (delta: -144.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,548 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:31,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -208.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,550 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,551 INFO L168 Benchmark]: RCFGBuilder took 191.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,552 INFO L168 Benchmark]: TraceAbstraction took 799.85 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: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,555 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 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 231.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -208.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 191.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 799.85 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: 39.8 MB). Peak memory consumption was 39.8 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 11:24:33,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:33,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:33,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:33,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:33,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:33,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:33,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:33,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:33,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:33,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:33,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:33,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:33,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:33,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:33,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:33,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:33,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:33,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:33,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:33,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:33,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:33,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:33,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:33,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:33,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:33,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:33,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:33,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:33,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:33,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:33,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:33,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:33,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:33,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:33,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:33,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:33,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:33,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:33,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:33,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:33,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:24:33,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:33,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:33,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:33,622 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:33,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:33,622 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:33,622 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:33,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:33,622 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:33,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:33,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:33,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:33,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:33,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:24:33,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:33,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:33,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:33,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:33,626 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:24:33,626 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:24:33,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:33,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:33,627 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_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 -> 43bf08ab7eab650af2134651dc434d79e4859447 [2019-10-22 11:24:33,660 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:33,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:33,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:33,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:33,678 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:33,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/../../sv-benchmarks/c/loop-new/count_by_1.i [2019-10-22 11:24:33,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/19d0a6625/7c8a751a057f445bac55919465726519/FLAGecadc6cbb [2019-10-22 11:24:34,107 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:34,109 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/sv-benchmarks/c/loop-new/count_by_1.i [2019-10-22 11:24:34,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/19d0a6625/7c8a751a057f445bac55919465726519/FLAGecadc6cbb [2019-10-22 11:24:34,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/data/19d0a6625/7c8a751a057f445bac55919465726519 [2019-10-22 11:24:34,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:34,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:34,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:34,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:34,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:34,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f89c54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,148 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:34,163 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:34,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:34,325 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:34,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:34,351 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:34,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34 WrapperNode [2019-10-22 11:24:34,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:34,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:34,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:34,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:34,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:34,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:34,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:34,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:34,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:34,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:34,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:34,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:34,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 11:24:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:34,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:34,629 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:34,630 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:24:34,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34 BoogieIcfgContainer [2019-10-22 11:24:34,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:34,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:34,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:34,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:34,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:34" (1/3) ... [2019-10-22 11:24:34,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1357e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (2/3) ... [2019-10-22 11:24:34,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1357e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34" (3/3) ... [2019-10-22 11:24:34,638 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2019-10-22 11:24:34,646 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:34,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:34,663 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:34,684 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:34,684 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:34,684 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:34,684 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:34,684 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:34,684 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:34,685 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:34,685 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:24:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:24:34,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:34,702 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:24:34,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 29776202, now seen corresponding path program 1 times [2019-10-22 11:24:34,717 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:34,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1603883966] [2019-10-22 11:24:34,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 11:24:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:34,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:24:34,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:34,799 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:34,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1603883966] [2019-10-22 11:24:34,810 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:34,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:24:34,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779565815] [2019-10-22 11:24:34,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:24:34,815 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:24:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:24:34,828 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-10-22 11:24:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:34,870 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2019-10-22 11:24:34,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:24:34,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:24:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:34,883 INFO L225 Difference]: With dead ends: 22 [2019-10-22 11:24:34,884 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 11:24:34,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:24:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 11:24:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 11:24:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 11:24:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-10-22 11:24:34,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2019-10-22 11:24:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:34,918 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-10-22 11:24:34,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:24:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-10-22 11:24:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:24:34,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:34,919 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2019-10-22 11:24:35,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:35,121 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2057893618, now seen corresponding path program 1 times [2019-10-22 11:24:35,122 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:35,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [443325486] [2019-10-22 11:24:35,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:35,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:24:35,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,185 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443325486] [2019-10-22 11:24:35,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539934258] [2019-10-22 11:24:35,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 [2019-10-22 11:24:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:35,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:24:35,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:35,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 7 [2019-10-22 11:24:35,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971099332] [2019-10-22 11:24:35,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:24:35,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:24:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:24:35,289 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-10-22 11:24:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:35,414 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-10-22 11:24:35,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:24:35,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 11:24:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:35,416 INFO L225 Difference]: With dead ends: 22 [2019-10-22 11:24:35,416 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 11:24:35,417 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:24:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 11:24:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-22 11:24:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 11:24:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-22 11:24:35,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2019-10-22 11:24:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:35,422 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-22 11:24:35,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:24:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-22 11:24:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 11:24:35,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:35,423 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2019-10-22 11:24:35,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:35,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:35,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1382489450, now seen corresponding path program 2 times [2019-10-22 11:24:35,825 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:35,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [513483583] [2019-10-22 11:24:35,825 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:35,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:35,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:35,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:35,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:36,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513483583] [2019-10-22 11:24:36,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923850809] [2019-10-22 11:24:36,161 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/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 [2019-10-22 11:24:36,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:36,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:36,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:36,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:36,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:36,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:36,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 15 [2019-10-22 11:24:36,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678130366] [2019-10-22 11:24:36,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 11:24:36,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:36,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 11:24:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:24:36,246 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 16 states. [2019-10-22 11:24:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:36,828 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-22 11:24:36,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 11:24:36,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-10-22 11:24:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:36,830 INFO L225 Difference]: With dead ends: 38 [2019-10-22 11:24:36,830 INFO L226 Difference]: Without dead ends: 34 [2019-10-22 11:24:36,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2019-10-22 11:24:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-22 11:24:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-22 11:24:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 11:24:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-22 11:24:36,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 17 [2019-10-22 11:24:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:36,839 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-22 11:24:36,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 11:24:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-22 11:24:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 11:24:36,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:36,841 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2019-10-22 11:24:37,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:37,242 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash 687504806, now seen corresponding path program 3 times [2019-10-22 11:24:37,243 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:37,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [27124531] [2019-10-22 11:24:37,243 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:37,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:24:37,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:37,279 WARN L254 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:37,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:37,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-22 11:24:37,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-22 11:24:37,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [27124531] [2019-10-22 11:24:37,439 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:37,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 11:24:37,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536266243] [2019-10-22 11:24:37,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:24:37,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:24:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:24:37,441 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 9 states. [2019-10-22 11:24:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:37,525 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-22 11:24:37,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:24:37,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-10-22 11:24:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:37,526 INFO L225 Difference]: With dead ends: 34 [2019-10-22 11:24:37,526 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:24:37,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:24:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:24:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:24:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:24:37,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2019-10-22 11:24:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:37,528 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:24:37,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:24:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:24:37,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:24:37,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:37,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:24:37,824 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:24:37,825 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:24:37,825 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:24:37,825 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:24:37,825 INFO L446 ceAbstractionStarter]: At program point L14(lines 10 15) the Hoare annotation is: true [2019-10-22 11:24:37,825 INFO L443 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2019-10-22 11:24:37,826 INFO L439 ceAbstractionStarter]: At program point L12-3(line 12) the Hoare annotation is: (bvslt (bvadd ULTIMATE.start_main_~i~0 (_ bv4294967295 32)) (_ bv1000000 32)) [2019-10-22 11:24:37,826 INFO L443 ceAbstractionStarter]: For program point L12-4(line 12) no Hoare annotation was computed. [2019-10-22 11:24:37,826 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 11:24:37,826 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 11:24:37,826 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-10-22 11:24:37,832 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 [2019-10-22 11:24:37,834 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 [2019-10-22 11:24:37,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:24:37 BoogieIcfgContainer [2019-10-22 11:24:37,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:24:37,840 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:24:37,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:24:37,841 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:24:37,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34" (3/4) ... [2019-10-22 11:24:37,846 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:24:37,855 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:24:37,856 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:24:37,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_89b250eb-a1d4-4ad0-be86-eb8e040b40c4/bin/utaipan/witness.graphml [2019-10-22 11:24:37,893 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:24:37,895 INFO L168 Benchmark]: Toolchain (without parser) took 3761.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 947.0 MB in the beginning and 970.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 147.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:37,895 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:37,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.24 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 936.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:37,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 936.2 MB in the beginning and 1.2 GB in the end (delta: -230.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:37,897 INFO L168 Benchmark]: Boogie Preprocessor took 22.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:37,897 INFO L168 Benchmark]: RCFGBuilder took 171.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:37,898 INFO L168 Benchmark]: TraceAbstraction took 3208.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.3 MB in the end (delta: 179.0 MB). Peak memory consumption was 179.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:37,898 INFO L168 Benchmark]: Witness Printer took 52.32 ms. Allocated memory is still 1.2 GB. Free memory is still 970.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:37,901 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 218.24 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 936.2 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 85.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 936.2 MB in the beginning and 1.2 GB in the end (delta: -230.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 171.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3208.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.3 MB in the end (delta: 179.0 MB). Peak memory consumption was 179.0 MB. Max. memory is 11.5 GB. * Witness Printer took 52.32 ms. Allocated memory is still 1.2 GB. Free memory is still 970.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant [2019-10-22 11:24:37,907 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 [2019-10-22 11:24:37,907 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvslt32 Derived loop invariant: NULL - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 3.1s, OverallIterations: 4, TraceHistogramMax: 14, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 27 SDslu, 37 SDs, 0 SdLazy, 193 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 19 NumberOfFragments, 7 HoareAnnotationTreeSize, 3 FomulaSimplifications, 191 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 90 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 8112 SizeOfPredicates, 8 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 392/552 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...