./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f ......................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-20 11:21:43,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:21:43,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:21:43,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:21:43,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:21:43,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:21:43,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:21:43,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:21:43,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:21:43,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:21:43,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:21:43,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:21:43,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:21:43,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:21:43,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:21:43,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:21:43,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:21:43,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:21:43,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:21:43,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:21:43,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:21:43,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:21:43,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:21:43,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:21:43,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:21:43,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:21:43,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:21:43,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:21:43,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:21:43,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:21:43,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:21:43,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:21:43,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:21:43,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:21:43,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:21:43,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:21:43,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:21:43,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:21:43,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:21:43,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:21:43,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:21:43,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2019-11-20 11:21:43,610 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:21:43,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:21:43,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-20 11:21:43,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2019-11-20 11:21:43,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:21:43,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:21:43,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:21:43,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:21:43,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:21:43,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:21:43,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:21:43,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:21:43,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:21:43,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:21:43,615 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:21:43,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:21:43,616 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:21:43,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:21:43,617 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-11-20 11:21:43,617 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-11-20 11:21:43,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:21:43,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:21:43,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-11-20 11:21:43,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:21:43,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:21:43,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:21:43,619 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-11-20 11:21:43,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 11:21:43,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:21:43,620 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/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak 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 -> Kojak 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 -> 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f [2019-11-20 11:21:43,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:21:43,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:21:43,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:21:43,792 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:21:43,792 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:21:43,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-20 11:21:43,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/data/53dbf8dec/6701be29b17d4a0f8efe6c93372cac3e/FLAGfdf42cfd8 [2019-11-20 11:21:44,293 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:21:44,294 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2019-11-20 11:21:44,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/data/53dbf8dec/6701be29b17d4a0f8efe6c93372cac3e/FLAGfdf42cfd8 [2019-11-20 11:21:44,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/data/53dbf8dec/6701be29b17d4a0f8efe6c93372cac3e [2019-11-20 11:21:44,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:21:44,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:21:44,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:21:44,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:21:44,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:21:44,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:21:44" (1/1) ... [2019-11-20 11:21:44,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3340a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:44, skipping insertion in model container [2019-11-20 11:21:44,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:21:44" (1/1) ... [2019-11-20 11:21:44,714 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:21:44,731 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:21:44,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:21:44,970 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:21:45,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:21:45,082 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:21:45,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45 WrapperNode [2019-11-20 11:21:45,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:21:45,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:21:45,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:21:45,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:21:45,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:21:45,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:21:45,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:21:45,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:21:45,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:21:45,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:21:45,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:21:45,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:21:45,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:21:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2019-11-20 11:21:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:21:45,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:21:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-20 11:21:45,194 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-20 11:21:45,410 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:21:45,410 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 11:21:45,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:45 BoogieIcfgContainer [2019-11-20 11:21:45,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:21:45,412 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-11-20 11:21:45,413 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-11-20 11:21:45,436 INFO L275 PluginConnector]: CodeCheck initialized [2019-11-20 11:21:45,437 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:45" (1/1) ... [2019-11-20 11:21:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:21:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-11-20 11:21:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 14 states and 16 transitions. [2019-11-20 11:21:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 11:21:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 11:21:45,523 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-11-20 11:21:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:21:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:21:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-11-20 11:21:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 18 states and 22 transitions. [2019-11-20 11:21:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-20 11:21:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 11:21:45,997 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-11-20 11:21:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:21:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:21:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-11-20 11:21:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 23 states and 32 transitions. [2019-11-20 11:21:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2019-11-20 11:21:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:21:46,780 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-11-20 11:21:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:21:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:21:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:21:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:21:46,932 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 3 iterations. [2019-11-20 11:21:46,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 20.11 11:21:46 ImpRootNode [2019-11-20 11:21:46,977 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-11-20 11:21:46,978 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:21:46,978 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:21:46,979 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:21:46,979 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:21:45" (3/4) ... [2019-11-20 11:21:46,982 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 11:21:47,065 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_aa5a0fee-1be3-4d85-aa04-be6391c68894/bin/ukojak/witness.graphml [2019-11-20 11:21:47,065 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:21:47,068 INFO L168 Benchmark]: Toolchain (without parser) took 2371.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -63.7 MB). Peak memory consumption was 73.7 MB. Max. memory is 11.5 GB. [2019-11-20 11:21:47,068 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:21:47,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:21:47,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:21:47,070 INFO L168 Benchmark]: Boogie Preprocessor took 13.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:21:47,071 INFO L168 Benchmark]: RCFGBuilder took 281.11 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:21:47,071 INFO L168 Benchmark]: CodeCheck took 1565.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.5 MB). Peak memory consumption was 95.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:21:47,072 INFO L168 Benchmark]: Witness Printer took 87.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 11:21:47,074 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 12 SDslu, 12 SDs, 0 SdLazy, 150 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 194 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 387.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 281.11 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * CodeCheck took 1565.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.5 MB). Peak memory consumption was 95.5 MB. Max. memory is 11.5 GB. * Witness Printer took 87.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...