./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/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 6c826362a5918246036ef78d4af04f2cfb17ad97 ......................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/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 6c826362a5918246036ef78d4af04f2cfb17ad97 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 20:13:11,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 20:13:11,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 20:13:11,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 20:13:11,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 20:13:11,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 20:13:11,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 20:13:11,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 20:13:11,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 20:13:11,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 20:13:11,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 20:13:11,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 20:13:11,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 20:13:11,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 20:13:11,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 20:13:11,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 20:13:11,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 20:13:11,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 20:13:11,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 20:13:11,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 20:13:11,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 20:13:11,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 20:13:11,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 20:13:11,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 20:13:11,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 20:13:11,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 20:13:11,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 20:13:11,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 20:13:11,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 20:13:11,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 20:13:11,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 20:13:11,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 20:13:11,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 20:13:11,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 20:13:11,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 20:13:11,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 20:13:11,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 20:13:11,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 20:13:11,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 20:13:11,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 20:13:11,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 20:13:11,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 20:13:11,373 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 20:13:11,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 20:13:11,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 20:13:11,374 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 20:13:11,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 20:13:11,374 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 20:13:11,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 20:13:11,374 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 20:13:11,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 20:13:11,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 20:13:11,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 20:13:11,375 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 20:13:11,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 20:13:11,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 20:13:11,375 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 20:13:11,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 20:13:11,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 20:13:11,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 20:13:11,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 20:13:11,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 20:13:11,378 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/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 -> 6c826362a5918246036ef78d4af04f2cfb17ad97 [2019-12-07 20:13:11,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 20:13:11,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 20:13:11,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 20:13:11,486 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 20:13:11,487 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 20:13:11,487 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2019-12-07 20:13:11,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/eaad100c1/f0f8c24104104fcd99a758946bef3719/FLAG5240bfddf [2019-12-07 20:13:11,919 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 20:13:11,920 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2019-12-07 20:13:11,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/eaad100c1/f0f8c24104104fcd99a758946bef3719/FLAG5240bfddf [2019-12-07 20:13:12,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/eaad100c1/f0f8c24104104fcd99a758946bef3719 [2019-12-07 20:13:12,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 20:13:12,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 20:13:12,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 20:13:12,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 20:13:12,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 20:13:12,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d678433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12, skipping insertion in model container [2019-12-07 20:13:12,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 20:13:12,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 20:13:12,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:13:12,438 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 20:13:12,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:13:12,494 INFO L208 MainTranslator]: Completed translation [2019-12-07 20:13:12,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12 WrapperNode [2019-12-07 20:13:12,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 20:13:12,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 20:13:12,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 20:13:12,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 20:13:12,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 20:13:12,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 20:13:12,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 20:13:12,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 20:13:12,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... [2019-12-07 20:13:12,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 20:13:12,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 20:13:12,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 20:13:12,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 20:13:12,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 20:13:12,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 20:13:12,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 20:13:12,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 20:13:12,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 20:13:12,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 20:13:12,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 20:13:12,751 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 20:13:12,751 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 20:13:12,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:13:12 BoogieIcfgContainer [2019-12-07 20:13:12,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 20:13:12,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 20:13:12,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 20:13:12,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 20:13:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 08:13:12" (1/3) ... [2019-12-07 20:13:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d65306b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:13:12, skipping insertion in model container [2019-12-07 20:13:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:12" (2/3) ... [2019-12-07 20:13:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d65306b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:13:12, skipping insertion in model container [2019-12-07 20:13:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:13:12" (3/3) ... [2019-12-07 20:13:12,758 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2019-12-07 20:13:12,764 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 20:13:12,769 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 20:13:12,776 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 20:13:12,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 20:13:12,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 20:13:12,793 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 20:13:12,793 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 20:13:12,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 20:13:12,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 20:13:12,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 20:13:12,794 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 20:13:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-12-07 20:13:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 20:13:12,808 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:12,808 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 20:13:12,809 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1684850581, now seen corresponding path program 1 times [2019-12-07 20:13:12,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:13:12,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226660947] [2019-12-07 20:13:12,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:13:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:13:12,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226660947] [2019-12-07 20:13:12,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:13:12,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 20:13:12,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952797216] [2019-12-07 20:13:12,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 20:13:12,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:13:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 20:13:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 20:13:12,928 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-12-07 20:13:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:13:12,951 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2019-12-07 20:13:12,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 20:13:12,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 20:13:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:13:12,958 INFO L225 Difference]: With dead ends: 18 [2019-12-07 20:13:12,958 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 20:13:12,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 20:13:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 20:13:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 20:13:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 20:13:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-12-07 20:13:12,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-12-07 20:13:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:13:12,981 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 20:13:12,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 20:13:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-12-07 20:13:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 20:13:12,982 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:12,982 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:12,982 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash -175580864, now seen corresponding path program 1 times [2019-12-07 20:13:12,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:13:12,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030026615] [2019-12-07 20:13:12,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:13:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 20:13:13,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030026615] [2019-12-07 20:13:13,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857598812] [2019-12-07 20:13:13,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:13,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 20:13:13,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 20:13:13,070 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 20:13:13,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156845908] [2019-12-07 20:13:13,096 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 20:13:13,096 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 20:13:13,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 20:13:13,106 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 20:13:13,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 20:13:13,468 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 20:13:13,697 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 20:13:13,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 20:13:13,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 20:13:13,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020963227] [2019-12-07 20:13:13,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 20:13:13,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:13:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 20:13:13,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 20:13:13,700 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 7 states. [2019-12-07 20:13:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:13:13,728 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2019-12-07 20:13:13,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 20:13:13,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-12-07 20:13:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:13:13,729 INFO L225 Difference]: With dead ends: 23 [2019-12-07 20:13:13,729 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 20:13:13,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-07 20:13:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 20:13:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 20:13:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 20:13:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 20:13:13,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2019-12-07 20:13:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:13:13,733 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 20:13:13,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 20:13:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-12-07 20:13:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 20:13:13,733 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:13,733 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:13,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:13,935 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1868152661, now seen corresponding path program 2 times [2019-12-07 20:13:13,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 20:13:13,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300469996] [2019-12-07 20:13:13,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 20:13:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 20:13:14,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300469996] [2019-12-07 20:13:14,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192340381] [2019-12-07 20:13:14,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:14,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 20:13:14,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:14,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 20:13:14,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 20:13:14,247 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:14,296 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@679e807e [2019-12-07 20:13:14,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229176895] [2019-12-07 20:13:14,298 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 20:13:14,298 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 20:13:14,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 20:13:14,298 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 20:13:14,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 20:13:14,304 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@679e807e at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:91) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:555) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:428) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:234) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 20:13:14,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 20:13:14,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-12-07 20:13:14,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700261025] [2019-12-07 20:13:14,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 20:13:14,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 20:13:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 20:13:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-07 20:13:14,306 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2019-12-07 20:13:14,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 20:13:14,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:14,508 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@679e807e at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 20:13:14,512 INFO L168 Benchmark]: Toolchain (without parser) took 2198.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 946.2 MB in the beginning and 867.3 MB in the end (delta: 78.9 MB). Peak memory consumption was 187.9 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:14,513 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:13:14,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.06 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:14,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.54 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:13:14,515 INFO L168 Benchmark]: Boogie Preprocessor took 15.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:13:14,516 INFO L168 Benchmark]: RCFGBuilder took 219.11 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: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:14,517 INFO L168 Benchmark]: TraceAbstraction took 1757.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 867.3 MB in the end (delta: 208.3 MB). Peak memory consumption was 208.3 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:14,521 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 181.06 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.54 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 15.17 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 219.11 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: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1757.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 867.3 MB in the end (delta: 208.3 MB). Peak memory consumption was 208.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@679e807e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@679e807e: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 20:13:15,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 20:13:15,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 20:13:15,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 20:13:15,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 20:13:15,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 20:13:15,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 20:13:15,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 20:13:15,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 20:13:15,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 20:13:15,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 20:13:15,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 20:13:15,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 20:13:15,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 20:13:15,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 20:13:15,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 20:13:15,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 20:13:15,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 20:13:15,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 20:13:15,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 20:13:15,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 20:13:15,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 20:13:15,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 20:13:15,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 20:13:15,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 20:13:15,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 20:13:15,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 20:13:15,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 20:13:15,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 20:13:15,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 20:13:15,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 20:13:15,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 20:13:15,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 20:13:15,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 20:13:15,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 20:13:15,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 20:13:15,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 20:13:15,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 20:13:15,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 20:13:15,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 20:13:15,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 20:13:15,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 20:13:15,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 20:13:15,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 20:13:15,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 20:13:15,902 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 20:13:15,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 20:13:15,902 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 20:13:15,902 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 20:13:15,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 20:13:15,902 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 20:13:15,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 20:13:15,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 20:13:15,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 20:13:15,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 20:13:15,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 20:13:15,904 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 20:13:15,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 20:13:15,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 20:13:15,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 20:13:15,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 20:13:15,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 20:13:15,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 20:13:15,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 20:13:15,906 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/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 -> 6c826362a5918246036ef78d4af04f2cfb17ad97 [2019-12-07 20:13:16,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 20:13:16,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 20:13:16,086 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 20:13:16,087 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 20:13:16,087 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 20:13:16,088 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2019-12-07 20:13:16,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/be8fa8b26/1ef0ae4453bd4054bda5e22ba519a619/FLAGeedaac4b5 [2019-12-07 20:13:16,558 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 20:13:16,559 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2019-12-07 20:13:16,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/be8fa8b26/1ef0ae4453bd4054bda5e22ba519a619/FLAGeedaac4b5 [2019-12-07 20:13:16,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/data/be8fa8b26/1ef0ae4453bd4054bda5e22ba519a619 [2019-12-07 20:13:16,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 20:13:16,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 20:13:16,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 20:13:16,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 20:13:16,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 20:13:16,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f14eeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16, skipping insertion in model container [2019-12-07 20:13:16,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 20:13:16,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 20:13:16,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:13:16,699 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 20:13:16,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 20:13:16,726 INFO L208 MainTranslator]: Completed translation [2019-12-07 20:13:16,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16 WrapperNode [2019-12-07 20:13:16,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 20:13:16,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 20:13:16,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 20:13:16,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 20:13:16,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 20:13:16,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 20:13:16,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 20:13:16,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 20:13:16,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... [2019-12-07 20:13:16,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 20:13:16,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 20:13:16,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 20:13:16,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 20:13:16,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 20:13:16,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 20:13:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 20:13:16,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 20:13:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 20:13:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 20:13:16,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 20:13:16,986 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 20:13:16,986 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 20:13:16,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:13:16 BoogieIcfgContainer [2019-12-07 20:13:16,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 20:13:16,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 20:13:16,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 20:13:16,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 20:13:16,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 08:13:16" (1/3) ... [2019-12-07 20:13:16,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e029a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:13:16, skipping insertion in model container [2019-12-07 20:13:16,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 08:13:16" (2/3) ... [2019-12-07 20:13:16,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e029a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 08:13:16, skipping insertion in model container [2019-12-07 20:13:16,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:13:16" (3/3) ... [2019-12-07 20:13:16,991 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2019-12-07 20:13:16,998 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 20:13:17,002 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 20:13:17,009 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 20:13:17,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 20:13:17,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 20:13:17,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 20:13:17,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 20:13:17,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 20:13:17,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 20:13:17,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 20:13:17,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 20:13:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 20:13:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 20:13:17,038 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:17,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:17,039 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:17,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2019-12-07 20:13:17,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 20:13:17,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569635720] [2019-12-07 20:13:17,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 20:13:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:17,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 20:13:17,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:13:17,115 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 20:13:17,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569635720] [2019-12-07 20:13:17,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:13:17,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 20:13:17,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904172873] [2019-12-07 20:13:17,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 20:13:17,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 20:13:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 20:13:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 20:13:17,143 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-12-07 20:13:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:13:17,197 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2019-12-07 20:13:17,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 20:13:17,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-12-07 20:13:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:13:17,206 INFO L225 Difference]: With dead ends: 38 [2019-12-07 20:13:17,207 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 20:13:17,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 20:13:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 20:13:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 20:13:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 20:13:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-12-07 20:13:17,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-12-07 20:13:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:13:17,234 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-12-07 20:13:17,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 20:13:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-12-07 20:13:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 20:13:17,235 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:17,235 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:17,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 20:13:17,436 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 1 times [2019-12-07 20:13:17,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 20:13:17,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772744567] [2019-12-07 20:13:17,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 20:13:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:17,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 20:13:17,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,518 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772744567] [2019-12-07 20:13:17,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497786671] [2019-12-07 20:13:17,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 20:13:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:17,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 20:13:17,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,611 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862951556] [2019-12-07 20:13:17,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 20:13:17,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 20:13:17,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,670 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 20:13:17,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 20:13:17,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2019-12-07 20:13:17,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687168770] [2019-12-07 20:13:17,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 20:13:17,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 20:13:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 20:13:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 20:13:17,679 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2019-12-07 20:13:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:13:17,859 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-12-07 20:13:17,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 20:13:17,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-12-07 20:13:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:13:17,861 INFO L225 Difference]: With dead ends: 49 [2019-12-07 20:13:17,861 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 20:13:17,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-12-07 20:13:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 20:13:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 20:13:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 20:13:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-12-07 20:13:17,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2019-12-07 20:13:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:13:17,868 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-12-07 20:13:17,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 20:13:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-12-07 20:13:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 20:13:17,869 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:17,869 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:18,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:18,471 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 2 times [2019-12-07 20:13:18,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 20:13:18,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024629076] [2019-12-07 20:13:18,474 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 20:13:18,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 20:13:18,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:18,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 20:13:18,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,577 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024629076] [2019-12-07 20:13:18,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [243851193] [2019-12-07 20:13:18,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 20:13:18,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 20:13:18,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:18,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 20:13:18,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,836 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053822366] [2019-12-07 20:13:18,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:18,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 20:13:18,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:18,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 20:13:18,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,918 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-07 20:13:18,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 20:13:18,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2019-12-07 20:13:18,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907839225] [2019-12-07 20:13:18,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 20:13:18,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 20:13:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 20:13:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-07 20:13:18,926 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2019-12-07 20:13:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 20:13:19,688 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2019-12-07 20:13:19,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 20:13:19,688 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-12-07 20:13:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 20:13:19,690 INFO L225 Difference]: With dead ends: 89 [2019-12-07 20:13:19,690 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 20:13:19,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2019-12-07 20:13:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 20:13:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-07 20:13:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 20:13:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-12-07 20:13:19,697 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 33 [2019-12-07 20:13:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 20:13:19,697 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-12-07 20:13:19,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 20:13:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-12-07 20:13:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-12-07 20:13:19,699 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 20:13:19,699 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 20:13:20,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:20,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 20:13:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 20:13:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash -773564643, now seen corresponding path program 3 times [2019-12-07 20:13:20,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 20:13:20,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177607525] [2019-12-07 20:13:20,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 20:13:20,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 20:13:20,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:20,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 20:13:20,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:20,397 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-12-07 20:13:20,397 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 20:13:20,404 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 20:13:20,404 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 20:13:20,404 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 20:13:20,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2019-12-07 20:13:20,427 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 20:13:20,451 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 20:13:20,452 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 20:13:20,452 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-12-07 20:13:20,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 20:13:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2019-12-07 20:13:20,725 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 20:13:20,933 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 20:13:20,933 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2019-12-07 20:13:20,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 20:13:20,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 20:13:20,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 20:13:20,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 20:13:20,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 20:13:20,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177607525] [2019-12-07 20:13:20,943 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@14cf75c5 [2019-12-07 20:13:20,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744343404] [2019-12-07 20:13:20,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 20:13:21,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 20:13:21,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:21,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 20:13:21,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:21,033 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@14cf75c5 [2019-12-07 20:13:21,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873179743] [2019-12-07 20:13:21,033 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4b5db113-6fb6-4ab1-a109-9f112ed6e0ba/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:21,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 20:13:21,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 20:13:21,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 20:13:21,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 20:13:21,079 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@14cf75c5 [2019-12-07 20:13:21,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 20:13:21,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 20:13:21,079 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 20:13:21,079 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 20:13:21,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 20:13:21,703 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 20:13:21,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 08:13:21 BoogieIcfgContainer [2019-12-07 20:13:21,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 20:13:21,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 20:13:21,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 20:13:21,704 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 20:13:21,704 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 08:13:16" (3/4) ... [2019-12-07 20:13:21,707 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 20:13:21,707 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 20:13:21,708 INFO L168 Benchmark]: Toolchain (without parser) took 5133.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 953.7 MB in the beginning and 1.2 GB in the end (delta: -204.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:13:21,708 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 20:13:21,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:21,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:21,709 INFO L168 Benchmark]: Boogie Preprocessor took 17.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:21,709 INFO L168 Benchmark]: RCFGBuilder took 187.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:21,710 INFO L168 Benchmark]: TraceAbstraction took 4716.41 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.8 MB). Peak memory consumption was 7.7 MB. Max. memory is 11.5 GB. [2019-12-07 20:13:21,710 INFO L168 Benchmark]: Witness Printer took 2.71 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. [2019-12-07 20:13:21,712 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 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 54.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 187.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4716.41 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.8 MB). Peak memory consumption was 7.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.71 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L6] int a[100000]; [L7] int b[100000]; [L8] int i; [L9] i = 0 [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND TRUE i < 100000 [L10] a[i] = __VERIFIER_nondet_int() [L9] i++ [L9] COND FALSE !(i < 100000) [L12] i = 0 [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND TRUE i < 100000 [L13] EXPR a[100000 -i-1] [L13] b[i] = a[100000 -i-1] [L12] i++ [L12] COND FALSE !(i < 100000) [L15] int x; [L16] x = 0 [L16] COND TRUE x < 100000 [L17] a[x] [L17] b[100000 -x-1] [L2] COND TRUE !(cond) [L2] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Result: UNKNOWN, OverallTime: 4.6s, OverallIterations: 4, TraceHistogramMax: 14, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 91 SDslu, 108 SDs, 0 SdLazy, 324 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 312 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 18304 SizeOfPredicates, 7 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 240/480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...