./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/nec20.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_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/nec20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/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 9a2cd7cd32168bcfd44c5ed14b95671353415deb .................................................................................................................................................................................................................................................................................................................... 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 11:08:40,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:08:40,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:08:41,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:08:41,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:08:41,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:08:41,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:08:41,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:08:41,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:08:41,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:08:41,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:08:41,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:08:41,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:08:41,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:08:41,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:08:41,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:08:41,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:08:41,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:08:41,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:08:41,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:08:41,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:08:41,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:08:41,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:08:41,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:08:41,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:08:41,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:08:41,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:08:41,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:08:41,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:08:41,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:08:41,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:08:41,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:08:41,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:08:41,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:08:41,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:08:41,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:08:41,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:08:41,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:08:41,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:08:41,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:08:41,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:08:41,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 11:08:41,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:08:41,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:08:41,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:08:41,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:08:41,074 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:08:41,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:08:41,075 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:08:41,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:08:41,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:08:41,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:08:41,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:08:41,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:08:41,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:08:41,076 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:08:41,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:08:41,077 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:08:41,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:08:41,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:08:41,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:08:41,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:08:41,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:08:41,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:08:41,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:08:41,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:08:41,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:08:41,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:08:41,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 11:08:41,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:08:41,079 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_9fba0353-8c3f-493e-aded-bb49c01e32fc/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 -> 9a2cd7cd32168bcfd44c5ed14b95671353415deb [2019-11-20 11:08:41,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:08:41,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:08:41,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:08:41,325 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:08:41,325 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:08:41,327 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/../../sv-benchmarks/c/loops/nec20.c [2019-11-20 11:08:41,403 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/data/aea9a7b6c/ccb049731872493c93068babdc4c1803/FLAG6d5551cc6 [2019-11-20 11:08:41,855 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:08:41,856 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/sv-benchmarks/c/loops/nec20.c [2019-11-20 11:08:41,863 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/data/aea9a7b6c/ccb049731872493c93068babdc4c1803/FLAG6d5551cc6 [2019-11-20 11:08:42,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/data/aea9a7b6c/ccb049731872493c93068babdc4c1803 [2019-11-20 11:08:42,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:08:42,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:08:42,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:08:42,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:08:42,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:08:42,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b60573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42, skipping insertion in model container [2019-11-20 11:08:42,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:08:42,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:08:42,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:08:42,491 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:08:42,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:08:42,605 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:08:42,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42 WrapperNode [2019-11-20 11:08:42,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:08:42,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:08:42,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:08:42,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:08:42,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:08:42,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:08:42,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:08:42,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:08:42,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... [2019-11-20 11:08:42,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:08:42,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:08:42,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:08:42,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:08:42,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/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 [2019-11-20 11:08:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:08:42,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:08:42,920 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:08:42,921 INFO L285 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-20 11:08:42,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:08:42 BoogieIcfgContainer [2019-11-20 11:08:42,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:08:42,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:08:42,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:08:42,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:08:42,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:08:42" (1/3) ... [2019-11-20 11:08:42,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9ba147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:08:42, skipping insertion in model container [2019-11-20 11:08:42,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:42" (2/3) ... [2019-11-20 11:08:42,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9ba147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:08:42, skipping insertion in model container [2019-11-20 11:08:42,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:08:42" (3/3) ... [2019-11-20 11:08:42,941 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-11-20 11:08:42,968 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:08:42,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 11:08:43,002 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 11:08:43,040 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:08:43,040 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 11:08:43,040 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:08:43,040 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:08:43,041 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:08:43,041 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:08:43,041 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:08:43,041 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:08:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-20 11:08:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 11:08:43,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:08:43,082 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:08:43,082 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:08:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:08:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash -592064849, now seen corresponding path program 1 times [2019-11-20 11:08:43,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:08:43,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321581713] [2019-11-20 11:08:43,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:08:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:08:43,341 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 11:08:43,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321581713] [2019-11-20 11:08:43,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:08:43,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 11:08:43,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407355405] [2019-11-20 11:08:43,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 11:08:43,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:08:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 11:08:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:08:43,364 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-20 11:08:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:08:43,469 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-11-20 11:08:43,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 11:08:43,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 11:08:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:08:43,486 INFO L225 Difference]: With dead ends: 43 [2019-11-20 11:08:43,486 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 11:08:43,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:08:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 11:08:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-20 11:08:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 11:08:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-20 11:08:43,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-20 11:08:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:08:43,521 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-20 11:08:43,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 11:08:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-20 11:08:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 11:08:43,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:08:43,522 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:08:43,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:08:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:08:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1182942513, now seen corresponding path program 1 times [2019-11-20 11:08:43,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:08:43,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640114438] [2019-11-20 11:08:43,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:08:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:08:43,664 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 11:08:43,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640114438] [2019-11-20 11:08:43,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:08:43,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 11:08:43,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93513275] [2019-11-20 11:08:43,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 11:08:43,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:08:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 11:08:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:08:43,667 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-20 11:08:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:08:43,735 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-11-20 11:08:43,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 11:08:43,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 11:08:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:08:43,736 INFO L225 Difference]: With dead ends: 23 [2019-11-20 11:08:43,736 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 11:08:43,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:08:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 11:08:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 11. [2019-11-20 11:08:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 11:08:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-20 11:08:43,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-11-20 11:08:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:08:43,741 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-20 11:08:43,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 11:08:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-20 11:08:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 11:08:43,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:08:43,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:08:43,743 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:08:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:08:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1172475752, now seen corresponding path program 1 times [2019-11-20 11:08:43,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:08:43,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483203698] [2019-11-20 11:08:43,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:08:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:08:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:08:43,845 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:08:43,848 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 11:08:43,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:08:43 BoogieIcfgContainer [2019-11-20 11:08:43,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 11:08:43,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:08:43,885 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:08:43,886 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:08:43,886 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:08:42" (3/4) ... [2019-11-20 11:08:43,889 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 11:08:43,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9fba0353-8c3f-493e-aded-bb49c01e32fc/bin/uautomizer/witness.graphml [2019-11-20 11:08:43,961 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:08:43,963 INFO L168 Benchmark]: Toolchain (without parser) took 1750.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -83.1 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,964 INFO L168 Benchmark]: CDTParser took 0.39 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 11:08:43,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,966 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.85 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. [2019-11-20 11:08:43,968 INFO L168 Benchmark]: Boogie Preprocessor took 17.88 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,972 INFO L168 Benchmark]: RCFGBuilder took 266.49 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,973 INFO L168 Benchmark]: TraceAbstraction took 949.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,974 INFO L168 Benchmark]: Witness Printer took 76.67 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:08:43,977 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 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 393.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.85 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.88 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 266.49 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 949.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 11.5 GB. * Witness Printer took 76.67 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; VAL [b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; VAL [b=0] [L17] COND TRUE \read(k) [L18] n=0 VAL [b=0] [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) VAL [b=0] [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 VAL [b=0] [L28] COND FALSE !(i <= n) VAL [b=0] [L33] a[i]=0 [L5] COND TRUE !(cond) VAL [b=0] [L6] __VERIFIER_error() VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 27 SDslu, 47 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, 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, 2 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 736 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...