./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 ............................................................................................................................................................................................................................................................................................................................................................... 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_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 11:25:12,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:12,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:12,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:12,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:12,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:12,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:12,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:12,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:12,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:12,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:12,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:12,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:12,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:12,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:12,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:12,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:12,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:12,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:12,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:12,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:12,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:12,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:12,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:12,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:12,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:12,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:12,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:12,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:12,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:12,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:12,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:12,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:12,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:12,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:12,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:12,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:12,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:12,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:12,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:12,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:12,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:12,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:12,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:12,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:12,480 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:12,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:12,481 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:12,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:12,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:12,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:12,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:12,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:12,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:12,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:12,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:12,491 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:12,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:12,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:12,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:12,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:12,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:12,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:12,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:12,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:12,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:12,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:12,494 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:12,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:12,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:12,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:12,494 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_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-10-22 11:25:12,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:12,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:12,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:12,550 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:12,550 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:12,551 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 11:25:12,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/46665c126/8431c06fe8234650bd266055e0df6ac3/FLAG505a55915 [2019-10-22 11:25:12,988 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:12,989 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 11:25:12,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/46665c126/8431c06fe8234650bd266055e0df6ac3/FLAG505a55915 [2019-10-22 11:25:13,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/46665c126/8431c06fe8234650bd266055e0df6ac3 [2019-10-22 11:25:13,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:13,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:13,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:13,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:13,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:13,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110994a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13, skipping insertion in model container [2019-10-22 11:25:13,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,032 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:13,049 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:13,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:13,221 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:13,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:13,314 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:13,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13 WrapperNode [2019-10-22 11:25:13,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:13,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:13,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:13,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:13,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:13,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:13,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:13,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... [2019-10-22 11:25:13,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:13,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:13,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:13,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:13,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 11:25:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:13,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:13,541 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:13,541 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:25:13,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:13 BoogieIcfgContainer [2019-10-22 11:25:13,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:13,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:13,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:13,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:13,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:13" (1/3) ... [2019-10-22 11:25:13,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cc79cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:13, skipping insertion in model container [2019-10-22 11:25:13,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:13" (2/3) ... [2019-10-22 11:25:13,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22cc79cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:13, skipping insertion in model container [2019-10-22 11:25:13,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:13" (3/3) ... [2019-10-22 11:25:13,550 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-10-22 11:25:13,560 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:13,566 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:13,577 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:13,599 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:13,599 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:13,599 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:13,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:13,599 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:13,599 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:13,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:13,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:25:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:13,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,615 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:13,616 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-10-22 11:25:13,627 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446940275] [2019-10-22 11:25:13,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,698 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 11:25:13,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446940275] [2019-10-22 11:25:13,699 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:13,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:13,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286292797] [2019-10-22 11:25:13,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:25:13,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:25:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:13,715 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 11:25:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,726 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 11:25:13,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:25:13,728 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:25:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,736 INFO L225 Difference]: With dead ends: 20 [2019-10-22 11:25:13,737 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:25:13,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:25:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:25:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:25:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:25:13,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:25:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,765 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:25:13,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:25:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:25:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:13,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,766 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:13,766 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-10-22 11:25:13,767 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131721804] [2019-10-22 11:25:13,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,866 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 11:25:13,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131721804] [2019-10-22 11:25:13,867 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:13,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:13,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730353781] [2019-10-22 11:25:13,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:25:13,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:25:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:25:13,870 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2019-10-22 11:25:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,902 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-10-22 11:25:13,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:25:13,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 11:25:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,904 INFO L225 Difference]: With dead ends: 15 [2019-10-22 11:25:13,904 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:25:13,905 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 11:25:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:25:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-10-22 11:25:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:25:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 11:25:13,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 11:25:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,911 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 11:25:13,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:25:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 11:25:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:25:13,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,911 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:13,911 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash 608596189, now seen corresponding path program 1 times [2019-10-22 11:25:13,912 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492343536] [2019-10-22 11:25:13,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,981 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 11:25:13,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492343536] [2019-10-22 11:25:13,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629984585] [2019-10-22 11:25:13,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 11:25:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:14,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:14,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:14,068 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 11:25:14,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:14,124 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 11:25:14,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [524926798] [2019-10-22 11:25:14,130 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 9 [2019-10-22 11:25:14,165 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:14,165 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:14,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:14,425 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 11:25:14,429 INFO L168 Benchmark]: Toolchain (without parser) took 1412.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -122.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,429 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:14,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -190.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,430 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:14,435 INFO L168 Benchmark]: Boogie Preprocessor took 18.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:14,436 INFO L168 Benchmark]: RCFGBuilder took 181.35 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: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,437 INFO L168 Benchmark]: TraceAbstraction took 883.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,439 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 298.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -190.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.35 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: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 883.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:16,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:16,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:16,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:16,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:16,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:16,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:16,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:16,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:16,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:16,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:16,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:16,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:16,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:16,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:16,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:16,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:16,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:16,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:16,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:16,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:16,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:16,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:16,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:16,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:16,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:16,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:16,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:16,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:16,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:16,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:16,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:16,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:16,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:16,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:16,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:16,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:16,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:16,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:16,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:16,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:16,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:16,631 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:16,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:16,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:16,632 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:16,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:16,632 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:16,633 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:16,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:16,633 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:16,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:16,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:16,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:16,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:16,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:16,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:16,636 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:16,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:16,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:16,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:16,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:16,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:16,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:16,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:16,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:16,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:16,637 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:16,638 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:16,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:16,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:16,638 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_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-10-22 11:25:16,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:16,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:16,682 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:16,683 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:16,684 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:16,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 11:25:16,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/2f50ceb88/281499ac9d574fdf8ec554af11d25b42/FLAG2d83126bf [2019-10-22 11:25:17,150 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:17,151 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 11:25:17,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/2f50ceb88/281499ac9d574fdf8ec554af11d25b42/FLAG2d83126bf [2019-10-22 11:25:17,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/data/2f50ceb88/281499ac9d574fdf8ec554af11d25b42 [2019-10-22 11:25:17,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:17,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:17,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:17,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:17,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:17,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487a8b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17, skipping insertion in model container [2019-10-22 11:25:17,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:17,206 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:17,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:17,378 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:17,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:17,418 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:17,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17 WrapperNode [2019-10-22 11:25:17,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:17,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:17,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:17,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:17,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:17,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:17,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:17,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:17,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:17,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:17,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:17,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:17,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 11:25:17,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:17,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:17,745 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:17,745 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:25:17,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:17 BoogieIcfgContainer [2019-10-22 11:25:17,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:17,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:17,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:17,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:17,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:17" (1/3) ... [2019-10-22 11:25:17,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6fa50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:17, skipping insertion in model container [2019-10-22 11:25:17,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (2/3) ... [2019-10-22 11:25:17,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6fa50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:17, skipping insertion in model container [2019-10-22 11:25:17,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:17" (3/3) ... [2019-10-22 11:25:17,755 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-10-22 11:25:17,766 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:17,773 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:17,781 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:17,807 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:17,807 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:17,807 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:17,808 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:17,808 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:17,808 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:17,808 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:17,808 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:25:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:17,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:17,830 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:17,832 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-10-22 11:25:17,851 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:17,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1043036835] [2019-10-22 11:25:17,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 11:25:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:17,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:25:17,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:17,933 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 11:25:17,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:17,937 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 11:25:17,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043036835] [2019-10-22 11:25:17,938 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:17,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:25:17,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162724164] [2019-10-22 11:25:17,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:25:17,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:25:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:17,962 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 11:25:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:17,983 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 11:25:17,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:25:17,984 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 11:25:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:17,994 INFO L225 Difference]: With dead ends: 20 [2019-10-22 11:25:17,995 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:25:17,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:25:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:25:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:25:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 11:25:18,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 11:25:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,035 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 11:25:18,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:25:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 11:25:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:25:18,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,036 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:25:18,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,237 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-10-22 11:25:18,238 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:18,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1415825529] [2019-10-22 11:25:18,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/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 11:25:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:18,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,312 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 11:25:18,315 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,436 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 11:25:18,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415825529] [2019-10-22 11:25:18,437 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:18,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:25:18,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650760084] [2019-10-22 11:25:18,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:25:18,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:18,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:25:18,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:18,439 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-10-22 11:25:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:18,502 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-10-22 11:25:18,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:25:18,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:25:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:18,504 INFO L225 Difference]: With dead ends: 16 [2019-10-22 11:25:18,504 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 11:25:18,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 11:25:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 11:25:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 11:25:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-10-22 11:25:18,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2019-10-22 11:25:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,514 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-10-22 11:25:18,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:25:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-10-22 11:25:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:25:18,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,517 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 11:25:18,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,718 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1123862993, now seen corresponding path program 1 times [2019-10-22 11:25:18,718 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:18,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [594687003] [2019-10-22 11:25:18,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:18,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:18,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:18,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594687003] [2019-10-22 11:25:18,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701761082] [2019-10-22 11:25:18,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:18,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:18,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:19,145 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:19,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 5] total 13 [2019-10-22 11:25:19,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164539516] [2019-10-22 11:25:19,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 11:25:19,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 11:25:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:25:19,151 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 14 states. [2019-10-22 11:25:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:19,745 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2019-10-22 11:25:19,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 11:25:19,746 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-10-22 11:25:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:19,748 INFO L225 Difference]: With dead ends: 43 [2019-10-22 11:25:19,749 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:25:19,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:25:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:25:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2019-10-22 11:25:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:25:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-22 11:25:19,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2019-10-22 11:25:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:19,758 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-22 11:25:19,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 11:25:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-22 11:25:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:25:19,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:19,760 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1] [2019-10-22 11:25:20,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:20,162 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1658775637, now seen corresponding path program 1 times [2019-10-22 11:25:20,163 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:20,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1981181763] [2019-10-22 11:25:20,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:20,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:25:20,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:20,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:20,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981181763] [2019-10-22 11:25:20,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199708738] [2019-10-22 11:25:20,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:20,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 11:25:20,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:20,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:21,151 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:21,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 10] total 25 [2019-10-22 11:25:21,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502895477] [2019-10-22 11:25:21,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 11:25:21,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 11:25:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2019-10-22 11:25:21,154 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 26 states. [2019-10-22 11:25:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:23,097 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-10-22 11:25:23,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-22 11:25:23,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 23 [2019-10-22 11:25:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:23,100 INFO L225 Difference]: With dead ends: 80 [2019-10-22 11:25:23,101 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 11:25:23,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=682, Invalid=2180, Unknown=0, NotChecked=0, Total=2862 [2019-10-22 11:25:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 11:25:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2019-10-22 11:25:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 11:25:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-10-22 11:25:23,112 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 23 [2019-10-22 11:25:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:23,113 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-10-22 11:25:23,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 11:25:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-10-22 11:25:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 11:25:23,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:23,114 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1] [2019-10-22 11:25:23,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:23,515 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1658007635, now seen corresponding path program 2 times [2019-10-22 11:25:23,515 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:23,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [695924907] [2019-10-22 11:25:23,516 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:23,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:23,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:23,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 11:25:23,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:25:23,797 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:25:24,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695924907] [2019-10-22 11:25:24,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162211651] [2019-10-22 11:25:24,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:24,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:24,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:24,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 11:25:24,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:24,576 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:26,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:26,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18, 19] total 48 [2019-10-22 11:25:26,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623846716] [2019-10-22 11:25:26,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-22 11:25:26,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-22 11:25:26,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2019-10-22 11:25:26,186 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 49 states. [2019-10-22 11:25:26,672 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 108 [2019-10-22 11:25:27,076 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2019-10-22 11:25:27,493 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2019-10-22 11:25:27,954 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2019-10-22 11:25:28,547 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 108 [2019-10-22 11:25:29,346 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2019-10-22 11:25:29,848 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2019-10-22 11:25:31,634 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 125 [2019-10-22 11:25:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:31,711 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2019-10-22 11:25:31,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-22 11:25:31,715 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 29 [2019-10-22 11:25:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:31,716 INFO L225 Difference]: With dead ends: 123 [2019-10-22 11:25:31,716 INFO L226 Difference]: Without dead ends: 82 [2019-10-22 11:25:31,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1040, Invalid=4216, Unknown=0, NotChecked=0, Total=5256 [2019-10-22 11:25:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-22 11:25:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2019-10-22 11:25:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-22 11:25:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-10-22 11:25:31,736 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 29 [2019-10-22 11:25:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:31,736 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-10-22 11:25:31,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-22 11:25:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-10-22 11:25:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 11:25:31,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:31,737 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1] [2019-10-22 11:25:32,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:32,139 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1235305809, now seen corresponding path program 3 times [2019-10-22 11:25:32,140 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:32,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1664581390] [2019-10-22 11:25:32,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:32,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-22 11:25:32,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:32,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:25:32,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:25:32,226 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:25:32,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664581390] [2019-10-22 11:25:32,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787968924] [2019-10-22 11:25:32,275 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:32,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-22 11:25:32,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:32,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:32,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:25:32,319 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 11:25:32,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:32,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 12 [2019-10-22 11:25:32,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616785493] [2019-10-22 11:25:32,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 11:25:32,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 11:25:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:25:32,375 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 13 states. [2019-10-22 11:25:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:32,426 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2019-10-22 11:25:32,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:25:32,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-10-22 11:25:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:32,427 INFO L225 Difference]: With dead ends: 54 [2019-10-22 11:25:32,427 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:25:32,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:25:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:25:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:25:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:25:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:25:32,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-10-22 11:25:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:32,428 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:25:32,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 11:25:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:25:32,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:25:32,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:32,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:25:33,155 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2019-10-22 11:25:33,156 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:25:33,156 INFO L446 ceAbstractionStarter]: At program point L31(lines 12 32) the Hoare annotation is: true [2019-10-22 11:25:33,157 INFO L439 ceAbstractionStarter]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse3 (= (_ bv37 8) ULTIMATE.start_main_~y~0)) (.cse7 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse6 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse0 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse4 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (let ((.cse5 ((_ zero_extend 24) ULTIMATE.start_main_~c~0))) (let ((.cse1 ((_ zero_extend 24) ULTIMATE.start_main_~x~0)) (.cse2 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse5 (_ bv1 32)))))) (and .cse0 (= ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse2 (_ bv1 32))))))))) (_ bv0 8)) .cse3 .cse4 (bvslt .cse5 (_ bv8 32)) (= ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse5))))) (_ bv0 8)) (= ((_ extract 7 0) (bvand .cse1 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse2))))) (_ bv0 8))))) (and .cse3 .cse4 (= (_ bv6 8) ULTIMATE.start_main_~c~0)) (and .cse6 (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse4 (not (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0)))) (and .cse0 .cse7 .cse4 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and (= (_ bv8 8) ULTIMATE.start_main_~c~0) .cse0 .cse3 .cse4) (and .cse7 .cse4 (= (_ bv3 8) ULTIMATE.start_main_~c~0)) (and .cse0 .cse7 .cse4 (= (_ bv4 8) ULTIMATE.start_main_~c~0)) (and .cse6 .cse0 .cse4 (= (_ bv2 8) ULTIMATE.start_main_~c~0)) (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) ULTIMATE.start_main_~y~0) .cse4))) [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point L21-3(lines 21 28) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L446 ceAbstractionStarter]: At program point L5-2(lines 4 9) the Hoare annotation is: true [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-10-22 11:25:33,157 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-10-22 11:25:33,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:33 BoogieIcfgContainer [2019-10-22 11:25:33,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:33,172 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:33,172 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:33,172 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:33,172 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:17" (3/4) ... [2019-10-22 11:25:33,176 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:25:33,185 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:25:33,185 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:25:33,221 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b1ab4c1e-c2f2-4d21-b93f-de30184b64ce/bin/utaipan/witness.graphml [2019-10-22 11:25:33,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:33,222 INFO L168 Benchmark]: Toolchain (without parser) took 16048.19 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 323.5 MB). Free memory was 952.4 MB in the beginning and 1.3 GB in the end (delta: -346.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:33,223 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:33,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.21 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -206.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,224 INFO L168 Benchmark]: Boogie Preprocessor took 21.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:33,224 INFO L168 Benchmark]: RCFGBuilder took 212.79 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,224 INFO L168 Benchmark]: TraceAbstraction took 15423.75 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -181.2 MB). Peak memory consumption was 423.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,225 INFO L168 Benchmark]: Witness Printer took 49.31 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,227 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 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.21 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 92.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -206.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 212.79 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15423.75 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -181.2 MB). Peak memory consumption was 423.0 MB. Max. memory is 11.5 GB. * Witness Printer took 49.31 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((((((((bit == 0bv8 && ~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0] == 0bv8) && 37bv8 == y) && 37bv8 == x) && ~bvslt32(~zero_extendFrom8To32(c), 8bv32)) && ~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0] == 0bv8) && ~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]))[7:0]))[7:0] == 0bv8) || ((37bv8 == y && 37bv8 == x) && 6bv8 == c)) || (((1bv8 == y && 1bv8 == c) && 37bv8 == x) && !(0bv32 == ~zero_extendFrom8To32(bit)))) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 5bv8 == c)) || (((8bv8 == c && bit == 0bv8) && 37bv8 == y) && 37bv8 == x)) || ((5bv8 == y && 37bv8 == x) && 3bv8 == c)) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 4bv8 == c)) || (((1bv8 == y && bit == 0bv8) && 37bv8 == x) && 2bv8 == c)) || ((0bv8 == c && 0bv8 == y) && 37bv8 == x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 15.3s, OverallIterations: 6, TraceHistogramMax: 8, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 50 SDtfs, 476 SDslu, 272 SDs, 0 SdLazy, 993 SolverSat, 310 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 434 GetRequests, 266 SyntacticMatches, 6 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 63 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 162 HoareAnnotationTreeSize, 3 FomulaSimplifications, 149 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 335 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 368 ConstructedInterpolants, 0 QuantifiedInterpolants, 133376 SizeOfPredicates, 39 NumberOfNonLiveVariables, 362 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 410/960 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...