./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3bf945356a28265a842df89cdbf40bfa9a223140 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:58:58,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:58:58,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:58:58,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:58:58,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:58:58,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:58:58,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:58:58,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:58:58,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:58:58,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:58:58,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:58:58,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:58:58,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:58:58,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:58:58,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:58:58,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:58:58,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:58:58,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:58:58,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:58:58,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:58:58,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:58:58,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:58:58,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:58:58,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:58:58,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:58:58,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:58:58,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:58:58,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:58:58,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:58:58,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:58:58,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:58:58,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:58:58,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:58:58,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:58:58,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:58:58,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:58:58,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:58:58,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:58:58,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:58:58,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:58:58,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:58:58,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:58:58,407 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:58:58,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:58:58,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:58:58,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:58:58,408 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:58:58,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:58:58,409 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:58:58,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:58:58,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:58:58,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:58:58,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:58:58,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:58:58,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:58:58,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:58:58,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:58:58,412 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:58:58,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:58:58,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:58:58,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:58:58,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:58:58,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:58:58,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:58,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:58:58,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:58:58,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:58:58,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:58:58,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:58:58,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:58:58,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer 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 -> Automizer 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 -> 3bf945356a28265a842df89cdbf40bfa9a223140 [2019-10-22 08:58:58,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:58:58,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:58:58,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:58:58,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:58:58,470 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:58:58,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-10-22 08:58:58,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/data/a5fb3a2c3/585e2b91d76a40ab8fbdd7a43754d3da/FLAG3b679f267 [2019-10-22 08:58:58,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:58:58,919 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2019-10-22 08:58:58,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/data/a5fb3a2c3/585e2b91d76a40ab8fbdd7a43754d3da/FLAG3b679f267 [2019-10-22 08:58:59,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/data/a5fb3a2c3/585e2b91d76a40ab8fbdd7a43754d3da [2019-10-22 08:58:59,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:58:59,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:58:59,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:59,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:58:59,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:58:59,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d3043b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59, skipping insertion in model container [2019-10-22 08:58:59,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,337 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:58:59,349 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:58:59,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:59,481 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:58:59,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:59,573 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:58:59,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59 WrapperNode [2019-10-22 08:58:59,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:59,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:59,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:58:59,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:58:59,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:59,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:58:59,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:58:59,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:58:59,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... [2019-10-22 08:58:59,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:58:59,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:58:59,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:58:59,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:58:59,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:59,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:58:59,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:58:59,684 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:58:59,684 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:58:59,808 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:58:59,808 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:58:59,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:59 BoogieIcfgContainer [2019-10-22 08:58:59,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:58:59,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:58:59,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:58:59,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:58:59,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:58:59" (1/3) ... [2019-10-22 08:58:59,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf84ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:59, skipping insertion in model container [2019-10-22 08:58:59,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:59" (2/3) ... [2019-10-22 08:58:59,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf84ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:59, skipping insertion in model container [2019-10-22 08:58:59,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:59" (3/3) ... [2019-10-22 08:58:59,816 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2019-10-22 08:58:59,824 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:58:59,830 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:58:59,838 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:58:59,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:58:59,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:58:59,859 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:58:59,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:58:59,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:58:59,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:58:59,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:58:59,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:58:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-22 08:58:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:58:59,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:59,879 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:59,881 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2019-10-22 08:58:59,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:59,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014823838] [2019-10-22 08:58:59,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:59,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:59,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:00,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014823838] [2019-10-22 08:59:00,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:00,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:59:00,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798488133] [2019-10-22 08:59:00,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:59:00,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:59:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:00,064 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2019-10-22 08:59:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:00,118 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-10-22 08:59:00,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:00,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:59:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:00,127 INFO L225 Difference]: With dead ends: 28 [2019-10-22 08:59:00,128 INFO L226 Difference]: Without dead ends: 15 [2019-10-22 08:59:00,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-22 08:59:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-22 08:59:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 08:59:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-22 08:59:00,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-10-22 08:59:00,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:00,168 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-22 08:59:00,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:59:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-22 08:59:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:59:00,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:00,170 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:00,170 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 510739163, now seen corresponding path program 1 times [2019-10-22 08:59:00,171 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:00,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235393822] [2019-10-22 08:59:00,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:59:00,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235393822] [2019-10-22 08:59:00,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:00,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:59:00,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142135664] [2019-10-22 08:59:00,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:59:00,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:59:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:00,279 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 7 states. [2019-10-22 08:59:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:00,303 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-10-22 08:59:00,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:00,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-22 08:59:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:00,307 INFO L225 Difference]: With dead ends: 27 [2019-10-22 08:59:00,307 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:59:00,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:59:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 08:59:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:59:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-22 08:59:00,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-10-22 08:59:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:00,313 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-22 08:59:00,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:59:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-22 08:59:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:59:00,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:00,314 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:00,315 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 539368314, now seen corresponding path program 1 times [2019-10-22 08:59:00,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:00,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95488464] [2019-10-22 08:59:00,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:59:00,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95488464] [2019-10-22 08:59:00,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153911672] [2019-10-22 08:59:00,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:59:00,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:59:00,537 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:00,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-22 08:59:00,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436878540] [2019-10-22 08:59:00,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:59:00,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:00,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:59:00,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:00,544 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2019-10-22 08:59:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:00,593 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-22 08:59:00,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:59:00,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-22 08:59:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:00,594 INFO L225 Difference]: With dead ends: 23 [2019-10-22 08:59:00,594 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:59:00,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:59:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:59:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 08:59:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:59:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-22 08:59:00,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2019-10-22 08:59:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:00,599 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-22 08:59:00,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:59:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-22 08:59:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:59:00,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:00,600 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:00,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:00,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -747825770, now seen corresponding path program 1 times [2019-10-22 08:59:00,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:00,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776038151] [2019-10-22 08:59:00,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:00,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:59:00,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776038151] [2019-10-22 08:59:00,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180563229] [2019-10-22 08:59:00,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:01,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:59:01,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:59:01,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:01,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-22 08:59:01,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730084796] [2019-10-22 08:59:01,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:59:01,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:59:01,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:59:01,053 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 11 states. [2019-10-22 08:59:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:01,113 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-22 08:59:01,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:59:01,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-10-22 08:59:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:01,115 INFO L225 Difference]: With dead ends: 31 [2019-10-22 08:59:01,115 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 08:59:01,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:59:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 08:59:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-10-22 08:59:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-22 08:59:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-22 08:59:01,122 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 23 [2019-10-22 08:59:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:01,123 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-22 08:59:01,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:59:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-22 08:59:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:59:01,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:01,124 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:01,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:01,327 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -719196619, now seen corresponding path program 2 times [2019-10-22 08:59:01,328 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:01,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972514370] [2019-10-22 08:59:01,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:01,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:01,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:01,387 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:59:01,387 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:59:01,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:01 BoogieIcfgContainer [2019-10-22 08:59:01,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:01,417 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:01,417 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:01,417 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:01,418 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:59" (3/4) ... [2019-10-22 08:59:01,420 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:59:01,460 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_bc6967e0-4e7e-4583-b71a-3a17509a2f8c/bin/uautomizer/witness.graphml [2019-10-22 08:59:01,460 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:01,462 INFO L168 Benchmark]: Toolchain (without parser) took 2137.65 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 949.9 MB in the beginning and 973.4 MB in the end (delta: -23.5 MB). Peak memory consumption was 84.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:01,465 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:01,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -152.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:01,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.81 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:01,466 INFO L168 Benchmark]: Boogie Preprocessor took 12.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:01,466 INFO L168 Benchmark]: RCFGBuilder took 192.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:01,467 INFO L168 Benchmark]: TraceAbstraction took 1606.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 973.4 MB in the end (delta: 110.2 MB). Peak memory consumption was 110.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:01,467 INFO L168 Benchmark]: Witness Printer took 43.61 ms. Allocated memory is still 1.1 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:01,470 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 248.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -152.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.81 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 12.39 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 192.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1606.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 973.4 MB in the end (delta: 110.2 MB). Peak memory consumption was 110.2 MB. Max. memory is 11.5 GB. * Witness Printer took 43.61 ms. Allocated memory is still 1.1 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 11 SDslu, 269 SDs, 0 SdLazy, 86 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 3223 SizeOfPredicates, 4 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 30/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...