./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/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 9eff01e8b41fd58fd007a4a54a96fca4ce69974c .................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-1dbac8b [2018-11-10 12:54:26,499 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:54:26,500 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:54:26,508 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:54:26,508 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:54:26,509 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:54:26,510 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:54:26,511 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:54:26,512 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:54:26,513 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:54:26,513 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:54:26,513 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:54:26,514 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:54:26,515 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:54:26,515 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:54:26,516 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:54:26,516 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:54:26,517 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:54:26,519 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:54:26,520 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:54:26,520 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:54:26,521 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:54:26,523 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:54:26,523 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:54:26,523 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:54:26,524 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:54:26,524 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:54:26,525 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:54:26,525 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:54:26,526 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:54:26,526 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:54:26,527 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:54:26,527 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:54:26,527 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:54:26,528 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:54:26,528 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:54:26,528 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2018-11-10 12:54:26,537 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:54:26,538 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:54:26,538 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 12:54:26,538 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 12:54:26,539 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:54:26,539 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:54:26,539 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:54:26,539 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 12:54:26,539 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:54:26,540 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 12:54:26,541 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-11-10 12:54:26,541 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-11-10 12:54:26,541 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:54:26,541 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 12:54:26,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-11-10 12:54:26,541 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:54:26,541 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 12:54:26,541 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 12:54:26,542 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-11-10 12:54:26,542 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 12:54:26,542 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 12:54:26,542 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/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 -> 9eff01e8b41fd58fd007a4a54a96fca4ce69974c [2018-11-10 12:54:26,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:54:26,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:54:26,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:54:26,577 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:54:26,577 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:54:26,578 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i [2018-11-10 12:54:26,614 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/data/5f7d04527/8d5694b2c9204018985f99cc6224fbb2/FLAGc9530b6c5 [2018-11-10 12:54:27,007 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:54:27,008 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i [2018-11-10 12:54:27,011 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/data/5f7d04527/8d5694b2c9204018985f99cc6224fbb2/FLAGc9530b6c5 [2018-11-10 12:54:27,020 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/data/5f7d04527/8d5694b2c9204018985f99cc6224fbb2 [2018-11-10 12:54:27,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:54:27,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 12:54:27,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:54:27,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:54:27,027 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:54:27,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34beab61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27, skipping insertion in model container [2018-11-10 12:54:27,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:54:27,046 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:54:27,146 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:54:27,148 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:54:27,161 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:54:27,173 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:54:27,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27 WrapperNode [2018-11-10 12:54:27,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:54:27,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 12:54:27,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 12:54:27,174 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 12:54:27,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 12:54:27,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:54:27,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:54:27,198 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:54:27,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:54:27,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:54:27,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:54:27,216 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:54:27,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:54:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/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 [2018-11-10 12:54:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 12:54:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 12:54:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:54:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:54:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 12:54:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 12:54:27,617 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:54:27,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:54:27 BoogieIcfgContainer [2018-11-10 12:54:27,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:54:27,618 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2018-11-10 12:54:27,618 INFO L271 PluginConnector]: Initializing CodeCheck... [2018-11-10 12:54:27,625 INFO L276 PluginConnector]: CodeCheck initialized [2018-11-10 12:54:27,625 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:54:27" (1/1) ... [2018-11-10 12:54:27,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:54:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 15 states and 21 transitions. [2018-11-10 12:54:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2018-11-10 12:54:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-10 12:54:27,656 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 15 states and 17 transitions. [2018-11-10 12:54:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-11-10 12:54:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 12:54:27,749 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 20 states and 26 transitions. [2018-11-10 12:54:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2018-11-10 12:54:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 12:54:27,890 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 25 states and 34 transitions. [2018-11-10 12:54:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2018-11-10 12:54:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 12:54:28,081 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 38 states and 56 transitions. [2018-11-10 12:54:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 56 transitions. [2018-11-10 12:54:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 12:54:29,194 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 45 states and 65 transitions. [2018-11-10 12:54:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2018-11-10 12:54:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:54:29,807 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 55 states and 80 transitions. [2018-11-10 12:54:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2018-11-10 12:54:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:54:31,257 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 57 states and 82 transitions. [2018-11-10 12:54:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2018-11-10 12:54:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 12:54:31,492 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:54:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 63 states and 91 transitions. [2018-11-10 12:54:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 91 transitions. [2018-11-10 12:54:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 12:54:32,497 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 68 states and 100 transitions. [2018-11-10 12:54:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2018-11-10 12:54:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 12:54:33,144 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 70 states and 102 transitions. [2018-11-10 12:54:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 102 transitions. [2018-11-10 12:54:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 12:54:33,397 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:54:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 62 states and 83 transitions. [2018-11-10 12:54:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2018-11-10 12:54:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 12:54:33,864 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 76 states and 106 transitions. [2018-11-10 12:54:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2018-11-10 12:54:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 12:54:36,980 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:54:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:54:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-10 12:54:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 78 states and 108 transitions. [2018-11-10 12:54:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2018-11-10 12:54:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 12:54:37,398 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2018-11-10 12:54:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:54:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:54:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:54:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:54:37,502 WARN L496 CodeCheckObserver]: This program is UNSAFE, Check terminated with 14 iterations. [2018-11-10 12:54:37,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 10.11 12:54:37 ImpRootNode [2018-11-10 12:54:37,528 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2018-11-10 12:54:37,528 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:54:37,528 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:54:37,528 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:54:37,529 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:54:27" (3/4) ... [2018-11-10 12:54:37,531 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 12:54:37,579 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e74c87d2-b94c-4b35-9f14-1bbe00b86a3a/bin-2019/ukojak/witness.graphml [2018-11-10 12:54:37,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:54:37,580 INFO L168 Benchmark]: Toolchain (without parser) took 10557.42 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 346.0 MB). Free memory was 954.8 MB in the beginning and 1.0 GB in the end (delta: -87.5 MB). Peak memory consumption was 258.5 MB. Max. memory is 11.5 GB. [2018-11-10 12:54:37,581 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:54:37,581 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.03 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:54:37,581 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.38 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 941.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:54:37,582 INFO L168 Benchmark]: Boogie Preprocessor took 17.30 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:54:37,582 INFO L168 Benchmark]: RCFGBuilder took 402.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -146.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:54:37,583 INFO L168 Benchmark]: CodeCheck took 9909.85 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 222.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.8 MB). Peak memory consumption was 268.1 MB. Max. memory is 11.5 GB. [2018-11-10 12:54:37,584 INFO L168 Benchmark]: Witness Printer took 51.11 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:54:37,587 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 36 locations, 1 error locations. UNSAFE Result, 9.8s OverallTime, 14 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86016 SDtfs, 56716 SDslu, 63208 SDs, 0 SdLazy, 221728 SolverSat, 73308 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2045 GetRequests, 1734 SyntacticMatches, 91 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24838 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 220 ConstructedInterpolants, 0 QuantifiedInterpolants, 44438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 21/161 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int MAX = __VERIFIER_nondet_uint(); [L14] FCALL char str1[MAX], str2[MAX]; [L15] int cont, i, j; [L16] cont = 0 [L18] i=0 [L18] COND TRUE i= 0 [L26] EXPR, FCALL str1[0] [L26] FCALL str2[j] = str1[0] [L27] j++ [L25] i-- [L25] COND TRUE i >= 0 [L26] EXPR, FCALL str1[0] [L26] FCALL str2[j] = str1[0] [L27] j++ [L25] i-- [L25] COND FALSE !(i >= 0) [L30] j = MAX-1 [L31] i=0 [L31] COND TRUE i