./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/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 a1a7cbd6e991197932302f7777b8b708f1820cc0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.25-f470102 [2019-12-07 17:40:49,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:40:49,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:40:49,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:40:49,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:40:49,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:40:49,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:40:49,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:40:49,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:40:49,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:40:49,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:40:49,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:40:49,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:40:49,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:40:49,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:40:49,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:40:49,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:40:49,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:40:49,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:40:49,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:40:49,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:40:49,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:40:49,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:40:49,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:40:49,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:40:49,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:40:49,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:40:49,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:40:49,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:40:49,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:40:49,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:40:49,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:40:49,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:40:49,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:40:49,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:40:49,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:40:49,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:40:49,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:40:49,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:40:49,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:40:49,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:40:49,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:40:49,923 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:40:49,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:40:49,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:40:49,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:40:49,924 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:40:49,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:40:49,925 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:40:49,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:40:49,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:40:49,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:40:49,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:40:49,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:40:49,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:40:49,926 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:40:49,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:40:49,927 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:40:49,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:40:49,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:40:49,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:40:49,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:40:49,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:40:49,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:40:49,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:40:49,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:40:49,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:40:49,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:40:49,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:40:49,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:40:49,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:40:49,929 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_2095a04d-9dcc-452b-bdc3-e8606075c3be/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 -> a1a7cbd6e991197932302f7777b8b708f1820cc0 [2019-12-07 17:40:50,037 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:40:50,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:40:50,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:40:50,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:40:50,049 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:40:50,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/../../sv-benchmarks/c/array-fpi/brs3f.c [2019-12-07 17:40:50,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/data/6e14fdb68/c0775ddf26124867bbaa990ba3d4e98c/FLAGb3dcd65e7 [2019-12-07 17:40:50,401 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:40:50,402 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/sv-benchmarks/c/array-fpi/brs3f.c [2019-12-07 17:40:50,405 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/data/6e14fdb68/c0775ddf26124867bbaa990ba3d4e98c/FLAGb3dcd65e7 [2019-12-07 17:40:50,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/data/6e14fdb68/c0775ddf26124867bbaa990ba3d4e98c [2019-12-07 17:40:50,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:40:50,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:40:50,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:40:50,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:40:50,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:40:50,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4051bc3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50, skipping insertion in model container [2019-12-07 17:40:50,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:40:50,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:40:50,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:40:50,587 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:40:50,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:40:50,609 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:40:50,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50 WrapperNode [2019-12-07 17:40:50,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:40:50,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:40:50,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:40:50,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:40:50,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:40:50,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:40:50,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:40:50,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:40:50,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... [2019-12-07 17:40:50,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:40:50,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:40:50,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:40:50,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:40:50,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/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 [2019-12-07 17:40:50,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:40:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:40:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 17:40:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:40:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:40:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:40:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:40:50,821 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:40:50,821 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 17:40:50,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:40:50 BoogieIcfgContainer [2019-12-07 17:40:50,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:40:50,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:40:50,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:40:50,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:40:50,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:40:50" (1/3) ... [2019-12-07 17:40:50,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e848640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:40:50, skipping insertion in model container [2019-12-07 17:40:50,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:40:50" (2/3) ... [2019-12-07 17:40:50,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e848640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:40:50, skipping insertion in model container [2019-12-07 17:40:50,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:40:50" (3/3) ... [2019-12-07 17:40:50,827 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2019-12-07 17:40:50,833 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:40:50,837 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:40:50,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:40:50,859 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:40:50,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:40:50,859 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:40:50,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:40:50,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:40:50,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:40:50,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:40:50,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:40:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 17:40:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:40:50,873 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:50,874 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:50,874 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1623807605, now seen corresponding path program 1 times [2019-12-07 17:40:50,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:50,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093227091] [2019-12-07 17:40:50,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:40:50,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093227091] [2019-12-07 17:40:50,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:40:50,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:40:50,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469505722] [2019-12-07 17:40:50,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:40:50,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:40:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:40:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:40:50,985 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-12-07 17:40:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:40:50,995 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-12-07 17:40:50,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:40:50,996 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 17:40:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:40:51,002 INFO L225 Difference]: With dead ends: 30 [2019-12-07 17:40:51,002 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 17:40:51,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:40:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 17:40:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 17:40:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 17:40:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-12-07 17:40:51,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2019-12-07 17:40:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:40:51,025 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-12-07 17:40:51,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:40:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-12-07 17:40:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 17:40:51,026 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:51,026 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:51,026 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1308886944, now seen corresponding path program 1 times [2019-12-07 17:40:51,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:51,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066119907] [2019-12-07 17:40:51,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:40:51,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066119907] [2019-12-07 17:40:51,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:40:51,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:40:51,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786691537] [2019-12-07 17:40:51,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:40:51,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:40:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:40:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:40:51,072 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-12-07 17:40:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:40:51,104 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-12-07 17:40:51,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:40:51,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 17:40:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:40:51,105 INFO L225 Difference]: With dead ends: 28 [2019-12-07 17:40:51,105 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 17:40:51,106 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:40:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 17:40:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-12-07 17:40:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 17:40:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-12-07 17:40:51,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-12-07 17:40:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:40:51,109 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-12-07 17:40:51,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:40:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-12-07 17:40:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 17:40:51,109 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:51,109 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:51,109 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1738269227, now seen corresponding path program 1 times [2019-12-07 17:40:51,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:51,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244650427] [2019-12-07 17:40:51,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:40:51,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244650427] [2019-12-07 17:40:51,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:40:51,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:40:51,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121279348] [2019-12-07 17:40:51,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:40:51,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:40:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:40:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:40:51,149 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2019-12-07 17:40:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:40:51,180 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-12-07 17:40:51,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:40:51,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-12-07 17:40:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:40:51,181 INFO L225 Difference]: With dead ends: 27 [2019-12-07 17:40:51,181 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 17:40:51,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:40:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 17:40:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-12-07 17:40:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 17:40:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-12-07 17:40:51,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-12-07 17:40:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:40:51,184 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-12-07 17:40:51,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:40:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-12-07 17:40:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:40:51,185 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:51,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:51,185 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1896871737, now seen corresponding path program 1 times [2019-12-07 17:40:51,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:51,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235278709] [2019-12-07 17:40:51,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:40:51,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235278709] [2019-12-07 17:40:51,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:40:51,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 17:40:51,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265905249] [2019-12-07 17:40:51,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 17:40:51,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:40:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 17:40:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:40:51,232 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2019-12-07 17:40:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:40:51,268 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-12-07 17:40:51,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:40:51,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 17:40:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:40:51,269 INFO L225 Difference]: With dead ends: 25 [2019-12-07 17:40:51,269 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 17:40:51,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:40:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 17:40:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 17:40:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 17:40:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 17:40:51,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2019-12-07 17:40:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:40:51,272 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 17:40:51,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 17:40:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 17:40:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 17:40:51,273 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:51,273 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:51,273 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1877487447, now seen corresponding path program 1 times [2019-12-07 17:40:51,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:51,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320784945] [2019-12-07 17:40:51,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:40:51,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320784945] [2019-12-07 17:40:51,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041206488] [2019-12-07 17:40:51,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:40:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:40:51,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 17:40:51,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:40:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:40:51,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:40:51,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-07 17:40:51,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991668372] [2019-12-07 17:40:51,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 17:40:51,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:40:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 17:40:51,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:40:51,395 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-12-07 17:40:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:40:51,477 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-12-07 17:40:51,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:40:51,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-12-07 17:40:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:40:51,478 INFO L225 Difference]: With dead ends: 41 [2019-12-07 17:40:51,478 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:40:51,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-07 17:40:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:40:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-12-07 17:40:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 17:40:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 17:40:51,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2019-12-07 17:40:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:40:51,484 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 17:40:51,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 17:40:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 17:40:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 17:40:51,485 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:40:51,485 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:40:51,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:40:51,685 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:40:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:40:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1112618428, now seen corresponding path program 1 times [2019-12-07 17:40:51,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:40:51,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572228530] [2019-12-07 17:40:51,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:40:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:40:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:40:51,746 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:40:51,746 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:40:51,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:40:51 BoogieIcfgContainer [2019-12-07 17:40:51,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:40:51,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:40:51,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:40:51,769 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:40:51,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:40:50" (3/4) ... [2019-12-07 17:40:51,771 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:40:51,805 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2095a04d-9dcc-452b-bdc3-e8606075c3be/bin/uautomizer/witness.graphml [2019-12-07 17:40:51,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:40:51,807 INFO L168 Benchmark]: Toolchain (without parser) took 1389.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 936.6 MB in the beginning and 946.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 71.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,807 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:40:51,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -140.3 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,808 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.48 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,808 INFO L168 Benchmark]: Boogie Preprocessor took 16.24 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,808 INFO L168 Benchmark]: RCFGBuilder took 171.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,808 INFO L168 Benchmark]: TraceAbstraction took 946.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.7 MB in the end (delta: 104.9 MB). Peak memory consumption was 104.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,809 INFO L168 Benchmark]: Witness Printer took 36.01 ms. Allocated memory is still 1.1 GB. Free memory was 948.7 MB in the beginning and 946.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:40:51,811 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 954.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 192.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -140.3 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.48 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.24 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 171.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 946.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 948.7 MB in the end (delta: 104.9 MB). Peak memory consumption was 104.9 MB. Max. memory is 11.5 GB. * Witness Printer took 36.01 ms. Allocated memory is still 1.1 GB. Free memory was 948.7 MB in the beginning and 946.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=2] [L26] COND TRUE i