./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.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_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 ........................................................................................................................................................................................................................................................................................................................ 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_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 ........................................................................................................................................................................................................................................................................................................................................................................................... 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 11:20:55,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:20:55,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:20:55,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:20:55,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:20:55,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:20:55,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:20:55,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:20:55,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:20:55,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:20:55,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:20:55,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:20:55,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:20:55,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:20:55,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:20:55,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:20:55,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:20:55,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:20:55,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:20:55,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:20:55,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:20:55,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:20:55,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:20:55,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:20:55,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:20:55,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:20:55,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:20:55,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:20:55,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:20:55,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:20:55,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:20:55,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:20:55,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:20:55,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:20:55,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:20:55,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:20:55,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:20:55,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:20:55,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:20:55,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:20:55,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:20:55,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:20:55,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:20:55,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:20:55,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:20:55,412 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:20:55,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:20:55,412 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:20:55,413 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:20:55,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:20:55,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:20:55,415 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:20:55,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:20:55,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:20:55,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:20:55,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:20:55,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:20:55,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:20:55,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:20:55,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:20:55,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:20:55,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:20:55,417 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:20:55,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:20:55,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:20:55,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:20:55,418 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_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2019-10-22 11:20:55,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:20:55,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:20:55,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:20:55,457 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:20:55,457 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:20:55,458 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-10-22 11:20:55,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/9e6fc7cb0/f07a0a102c294d7ab249249abf80f8d4/FLAG45c8c3677 [2019-10-22 11:20:55,908 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:20:55,909 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-10-22 11:20:55,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/9e6fc7cb0/f07a0a102c294d7ab249249abf80f8d4/FLAG45c8c3677 [2019-10-22 11:20:56,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/9e6fc7cb0/f07a0a102c294d7ab249249abf80f8d4 [2019-10-22 11:20:56,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:20:56,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:20:56,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:20:56,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:20:56,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:20:56,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b17023b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56, skipping insertion in model container [2019-10-22 11:20:56,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,338 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:20:56,348 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:20:56,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:20:56,465 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:20:56,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:20:56,546 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:20:56,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56 WrapperNode [2019-10-22 11:20:56,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:20:56,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:20:56,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:20:56,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:20:56,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:20:56,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:20:56,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:20:56,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:20:56,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... [2019-10-22 11:20:56,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:20:56,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:20:56,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:20:56,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:20:56,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 11:20:56,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:20:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:20:56,745 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:20:56,746 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:20:56,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:20:56 BoogieIcfgContainer [2019-10-22 11:20:56,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:20:56,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:20:56,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:20:56,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:20:56,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:20:56" (1/3) ... [2019-10-22 11:20:56,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eefa7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:20:56, skipping insertion in model container [2019-10-22 11:20:56,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:20:56" (2/3) ... [2019-10-22 11:20:56,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eefa7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:20:56, skipping insertion in model container [2019-10-22 11:20:56,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:20:56" (3/3) ... [2019-10-22 11:20:56,754 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-10-22 11:20:56,762 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:20:56,766 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:20:56,774 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:20:56,790 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:20:56,790 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:20:56,790 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:20:56,790 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:20:56,791 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:20:56,791 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:20:56,791 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:20:56,791 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:20:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 11:20:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:20:56,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:20:56,804 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:20:56,805 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:20:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:20:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 11:20:56,815 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:20:56,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422048476] [2019-10-22 11:20:56,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:20:56,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:20:56,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:20:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:20:56,966 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 11:20:56,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422048476] [2019-10-22 11:20:56,967 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:20:56,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:20:56,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124644422] [2019-10-22 11:20:56,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:20:56,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:20:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:20:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:20:56,987 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-10-22 11:20:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:20:57,008 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-10-22 11:20:57,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:20:57,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 11:20:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:20:57,018 INFO L225 Difference]: With dead ends: 17 [2019-10-22 11:20:57,018 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 11:20:57,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 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 11:20:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 11:20:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 11:20:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 11:20:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 11:20:57,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 11:20:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:20:57,051 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 11:20:57,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:20:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 11:20:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:20:57,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:20:57,052 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:20:57,052 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:20:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:20:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-10-22 11:20:57,053 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:20:57,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311695008] [2019-10-22 11:20:57,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:20:57,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:20:57,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:20:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:20:57,123 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 11:20:57,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311695008] [2019-10-22 11:20:57,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089016219] [2019-10-22 11:20:57,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 11:20:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:20:57,172 WARN L254 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:20:57,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:20:57,239 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 11:20:57,239 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:20:57,294 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 11:20:57,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1033895967] [2019-10-22 11:20:57,299 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 7 [2019-10-22 11:20:57,323 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:20:57,323 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:20:57,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:20:57,572 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 11:20:57,577 INFO L168 Benchmark]: Toolchain (without parser) took 1252.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -97.1 MB). Peak memory consumption was 17.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:20:57,577 INFO L168 Benchmark]: CDTParser took 0.18 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 11:20:57,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -164.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:20:57,583 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.49 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:20:57,583 INFO L168 Benchmark]: Boogie Preprocessor took 17.51 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:20:57,584 INFO L168 Benchmark]: RCFGBuilder took 155.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:20:57,584 INFO L168 Benchmark]: TraceAbstraction took 827.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:20:57,587 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 222.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -164.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.49 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.51 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 155.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 827.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 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 11:20:59,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:20:59,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:20:59,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:20:59,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:20:59,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:20:59,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:20:59,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:20:59,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:20:59,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:20:59,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:20:59,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:20:59,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:20:59,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:20:59,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:20:59,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:20:59,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:20:59,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:20:59,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:20:59,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:20:59,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:20:59,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:20:59,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:20:59,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:20:59,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:20:59,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:20:59,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:20:59,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:20:59,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:20:59,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:20:59,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:20:59,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:20:59,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:20:59,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:20:59,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:20:59,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:20:59,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:20:59,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:20:59,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:20:59,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:20:59,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:20:59,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:20:59,695 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:20:59,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:20:59,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:20:59,696 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:20:59,697 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:20:59,697 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:20:59,697 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:20:59,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:20:59,697 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:20:59,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:20:59,698 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:20:59,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:20:59,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:20:59,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:20:59,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:20:59,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:20:59,702 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:20:59,702 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:20:59,702 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:20:59,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:20:59,703 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:20:59,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:20:59,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:20:59,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:20:59,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:20:59,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:20:59,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:20:59,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:20:59,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:20:59,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:20:59,704 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:20:59,705 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:20:59,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:20:59,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:20:59,705 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_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 -> 1ca0873bbf5698fb1752ac7aba535da1c4a773e2 [2019-10-22 11:20:59,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:20:59,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:20:59,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:20:59,751 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:20:59,752 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:20:59,752 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-10-22 11:20:59,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/0589f59f3/fe92a9927a3144148f02c2cf7a095a83/FLAG47089fff9 [2019-10-22 11:21:00,169 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:00,169 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2019-10-22 11:21:00,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/0589f59f3/fe92a9927a3144148f02c2cf7a095a83/FLAG47089fff9 [2019-10-22 11:21:00,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/data/0589f59f3/fe92a9927a3144148f02c2cf7a095a83 [2019-10-22 11:21:00,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:00,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:00,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:00,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:00,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:00,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb72ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00, skipping insertion in model container [2019-10-22 11:21:00,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,601 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:00,618 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:00,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:00,793 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:00,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:00,821 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:00,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00 WrapperNode [2019-10-22 11:21:00,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:00,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:00,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:00,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:00,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:00,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:00,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:00,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:00,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... [2019-10-22 11:21:00,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:00,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:00,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:00,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:00,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 11:21:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:00,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:01,127 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:01,128 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:21:01,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:01 BoogieIcfgContainer [2019-10-22 11:21:01,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:01,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:01,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:01,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:01,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:00" (1/3) ... [2019-10-22 11:21:01,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbfa5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:01, skipping insertion in model container [2019-10-22 11:21:01,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:00" (2/3) ... [2019-10-22 11:21:01,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbfa5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:01, skipping insertion in model container [2019-10-22 11:21:01,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:01" (3/3) ... [2019-10-22 11:21:01,136 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-10-22 11:21:01,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:01,152 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:01,162 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:01,184 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:01,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:01,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:01,184 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:01,184 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:01,184 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:01,184 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:01,184 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 11:21:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:01,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:01,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:01,201 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:01,207 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 11:21:01,216 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:01,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1012736831] [2019-10-22 11:21:01,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 11:21:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:01,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:21:01,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:01,298 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 11:21:01,299 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:01,312 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 11:21:01,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012736831] [2019-10-22 11:21:01,313 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:01,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:21:01,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903022100] [2019-10-22 11:21:01,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:01,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:01,332 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-10-22 11:21:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:01,381 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-10-22 11:21:01,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:01,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:21:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:01,391 INFO L225 Difference]: With dead ends: 18 [2019-10-22 11:21:01,391 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:21:01,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:21:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:21:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:21:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 11:21:01,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-10-22 11:21:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:01,424 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 11:21:01,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 11:21:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:21:01,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:01,425 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 11:21:01,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:01,626 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 1 times [2019-10-22 11:21:01,627 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:01,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [876415448] [2019-10-22 11:21:01,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/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 11:21:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:01,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:21:01,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:01,698 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:01,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876415448] [2019-10-22 11:21:01,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239988160] [2019-10-22 11:21:01,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:01,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:21:01,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:01,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:01,858 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:01,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 9 [2019-10-22 11:21:01,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423660342] [2019-10-22 11:21:01,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:21:01,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:01,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:21:01,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:21:01,861 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 10 states. [2019-10-22 11:21:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:02,068 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-10-22 11:21:02,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:21:02,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-10-22 11:21:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:02,070 INFO L225 Difference]: With dead ends: 16 [2019-10-22 11:21:02,071 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 11:21:02,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:21:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 11:21:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 11:21:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 11:21:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-22 11:21:02,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2019-10-22 11:21:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:02,077 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-22 11:21:02,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:21:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-22 11:21:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:21:02,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:02,079 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-10-22 11:21:02,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:02,480 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 2 times [2019-10-22 11:21:02,482 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:02,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2071548614] [2019-10-22 11:21:02,482 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:02,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:02,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:02,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:21:02,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:02,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:02,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071548614] [2019-10-22 11:21:02,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94188880] [2019-10-22 11:21:02,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:02,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:02,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:02,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 11:21:02,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:02,712 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:03,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:03,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 16 [2019-10-22 11:21:03,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233909792] [2019-10-22 11:21:03,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 11:21:03,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:03,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 11:21:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-22 11:21:03,051 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 17 states. [2019-10-22 11:21:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:03,145 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-10-22 11:21:03,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:21:03,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2019-10-22 11:21:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:03,146 INFO L225 Difference]: With dead ends: 15 [2019-10-22 11:21:03,146 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:21:03,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-10-22 11:21:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:21:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:21:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:21:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:21:03,147 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-10-22 11:21:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:03,148 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:21:03,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 11:21:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:21:03,148 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:21:03,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:03,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:21:03,654 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:21:03,654 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 11:21:03,655 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:21:03,655 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:21:03,655 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:21:03,655 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= (_ bv6 32) ULTIMATE.start_main_~x~0) (= (_ bv1 32) ULTIMATE.start_main_~x~0) (= (_ bv5 32) ULTIMATE.start_main_~x~0) (= (_ bv3 32) ULTIMATE.start_main_~x~0) (= (_ bv0 32) ULTIMATE.start_main_~x~0) (= (_ bv2 32) ULTIMATE.start_main_~x~0) (= (_ bv4 32) ULTIMATE.start_main_~x~0)) [2019-10-22 11:21:03,655 INFO L443 ceAbstractionStarter]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-10-22 11:21:03,655 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 11:21:03,656 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-10-22 11:21:03,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:03 BoogieIcfgContainer [2019-10-22 11:21:03,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:03,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:03,669 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:03,669 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:03,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:01" (3/4) ... [2019-10-22 11:21:03,677 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:21:03,688 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:21:03,688 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:21:03,729 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9691bca4-4a00-4dec-bc62-8ba0c00a5b8d/bin/utaipan/witness.graphml [2019-10-22 11:21:03,729 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:03,731 INFO L168 Benchmark]: Toolchain (without parser) took 3147.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 942.9 MB in the beginning and 1.0 GB in the end (delta: -65.1 MB). Peak memory consumption was 100.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:03,731 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:03,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.55 ms. Allocated memory is still 1.0 GB. Free memory was 942.9 MB in the beginning and 932.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:03,733 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 932.2 MB in the beginning and 1.2 GB in the end (delta: -229.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:03,733 INFO L168 Benchmark]: Boogie Preprocessor took 18.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:03,733 INFO L168 Benchmark]: RCFGBuilder took 189.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:03,734 INFO L168 Benchmark]: TraceAbstraction took 2538.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 134.5 MB). Peak memory consumption was 134.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:03,735 INFO L168 Benchmark]: Witness Printer took 60.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:03,737 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 237.55 ms. Allocated memory is still 1.0 GB. Free memory was 942.9 MB in the beginning and 932.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 98.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 932.2 MB in the beginning and 1.2 GB in the end (delta: -229.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 189.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2538.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 134.5 MB). Peak memory consumption was 134.5 MB. Max. memory is 11.5 GB. * Witness Printer took 60.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((6bv32 == x || 1bv32 == x) || 5bv32 == x) || 3bv32 == x) || 0bv32 == x) || 2bv32 == x) || 4bv32 == x - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 13 SDtfs, 13 SDslu, 18 SDs, 0 SdLazy, 106 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 23 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 2176 SizeOfPredicates, 9 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 15/96 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...