./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/nec40.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 ................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/nec40.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 .................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:55:24,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:24,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:24,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:24,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:24,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:24,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:24,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:24,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:24,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:24,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:24,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:24,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:24,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:24,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:24,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:24,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:24,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:24,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:24,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:24,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:24,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:24,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:24,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:24,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:24,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:24,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:24,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:24,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:24,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:24,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:24,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:24,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:24,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:24,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:24,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:24,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:24,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:24,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:24,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:24,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:24,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:24,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:24,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:24,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:24,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:24,295 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:24,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:24,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:24,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:24,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:24,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:24,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:24,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:24,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:24,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:24,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:24,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:24,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:24,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:24,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:24,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:24,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:24,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:24,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:24,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:24,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:24,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:24,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:24,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:24,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:24,301 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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(reach_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 -> e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 [2020-10-20 00:55:24,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:24,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:24,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:24,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:24,524 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:24,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec40.c [2020-10-20 00:55:24,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab771f27/f1a0df2e62a34d159b48e3b1807eded3/FLAG49d57aff8 [2020-10-20 00:55:25,137 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:25,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec40.c [2020-10-20 00:55:25,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab771f27/f1a0df2e62a34d159b48e3b1807eded3/FLAG49d57aff8 [2020-10-20 00:55:25,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab771f27/f1a0df2e62a34d159b48e3b1807eded3 [2020-10-20 00:55:25,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:25,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:25,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:25,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:25,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:25,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cc5e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25, skipping insertion in model container [2020-10-20 00:55:25,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:25,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:25,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:25,774 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:25,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:25,814 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:25,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25 WrapperNode [2020-10-20 00:55:25,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:25,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:25,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:25,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:25,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:25,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:25,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:25,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:25,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... [2020-10-20 00:55:25,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:25,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:25,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:25,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:25,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:55:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:55:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:25,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:55:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:26,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:26,207 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:26,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:26 BoogieIcfgContainer [2020-10-20 00:55:26,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:26,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:26,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:26,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:26,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:25" (1/3) ... [2020-10-20 00:55:26,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f01585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:26, skipping insertion in model container [2020-10-20 00:55:26,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:25" (2/3) ... [2020-10-20 00:55:26,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f01585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:26, skipping insertion in model container [2020-10-20 00:55:26,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:26" (3/3) ... [2020-10-20 00:55:26,218 INFO L111 eAbstractionObserver]: Analyzing ICFG nec40.c [2020-10-20 00:55:26,232 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:26,239 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:26,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:26,295 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:26,296 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:26,296 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:26,296 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:26,297 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:26,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:26,297 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:26,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:55:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:26,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:26,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:26,325 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 383725322, now seen corresponding path program 1 times [2020-10-20 00:55:26,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:26,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957633442] [2020-10-20 00:55:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:26,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957633442] [2020-10-20 00:55:26,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:26,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:26,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235496171] [2020-10-20 00:55:26,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:26,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:26,536 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:55:26,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:26,553 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-20 00:55:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:26,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:26,565 INFO L225 Difference]: With dead ends: 25 [2020-10-20 00:55:26,565 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 00:55:26,569 INFO L677 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 [2020-10-20 00:55:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 00:55:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 00:55:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:55:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:55:26,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-10-20 00:55:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:26,601 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:55:26,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:55:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:55:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:26,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:26,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:26,603 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1213354159, now seen corresponding path program 1 times [2020-10-20 00:55:26,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:26,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958181820] [2020-10-20 00:55:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:26,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958181820] [2020-10-20 00:55:26,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:26,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:55:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042568168] [2020-10-20 00:55:26,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:55:26,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:26,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:55:26,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:26,695 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2020-10-20 00:55:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:26,724 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-20 00:55:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:55:26,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 00:55:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:26,725 INFO L225 Difference]: With dead ends: 18 [2020-10-20 00:55:26,726 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:55:26,727 INFO L677 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 [2020-10-20 00:55:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:55:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:55:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:55:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-20 00:55:26,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-10-20 00:55:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:26,732 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-20 00:55:26,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:55:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-20 00:55:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:26,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:26,733 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:26,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:26,734 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1626878186, now seen corresponding path program 1 times [2020-10-20 00:55:26,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:26,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991981817] [2020-10-20 00:55:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991981817] [2020-10-20 00:55:26,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:26,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:55:26,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718566153] [2020-10-20 00:55:26,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:26,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:26,833 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-20 00:55:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:26,851 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-10-20 00:55:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:26,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:55:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:26,852 INFO L225 Difference]: With dead ends: 12 [2020-10-20 00:55:26,852 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:55:26,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:55:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:55:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:55:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:55:26,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-10-20 00:55:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:26,855 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:55:26,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:55:26,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:55:26,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:55:26,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:55:26,884 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:55:26,885 INFO L274 CegarLoopResult]: For program point L27(lines 27 28) no Hoare annotation was computed. [2020-10-20 00:55:26,885 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 00:55:26,885 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:55:26,885 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:55:26,885 INFO L277 CegarLoopResult]: At program point L30(lines 16 31) the Hoare annotation is: true [2020-10-20 00:55:26,886 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:55:26,886 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:55:26,886 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-10-20 00:55:26,886 INFO L277 CegarLoopResult]: At program point L26-1(lines 26 28) the Hoare annotation is: true [2020-10-20 00:55:26,887 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:55:26,887 INFO L274 CegarLoopResult]: For program point L20-1(lines 20 23) no Hoare annotation was computed. [2020-10-20 00:55:26,887 INFO L270 CegarLoopResult]: At program point L20-3(lines 20 23) the Hoare annotation is: (and (= (select |#memory_int| |~#x~0.base|) ((as const (Array Int Int)) 0)) (= ~i~0 0)) [2020-10-20 00:55:26,887 INFO L274 CegarLoopResult]: For program point L20-4(lines 20 23) no Hoare annotation was computed. [2020-10-20 00:55:26,887 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-20 00:55:26,896 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:707) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:267) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-20 00:55:26,902 INFO L168 Benchmark]: Toolchain (without parser) took 1388.56 ms. Allocated memory was 40.4 MB in the beginning and 45.6 MB in the end (delta: 5.2 MB). Free memory was 20.8 MB in the beginning and 18.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,903 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 30.9 MB. Free memory was 6.1 MB in the beginning and 6.1 MB in the end (delta: 40.6 kB). Peak memory consumption was 40.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.91 ms. Allocated memory was 40.4 MB in the beginning and 42.5 MB in the end (delta: 2.1 MB). Free memory was 20.0 MB in the beginning and 20.7 MB in the end (delta: -652.2 kB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 42.5 MB. Free memory was 20.7 MB in the beginning and 18.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,906 INFO L168 Benchmark]: Boogie Preprocessor took 29.10 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,907 INFO L168 Benchmark]: RCFGBuilder took 321.61 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 17.4 MB in the beginning and 19.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,909 INFO L168 Benchmark]: TraceAbstraction took 689.10 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 18.8 MB in the beginning and 18.8 MB in the end (delta: -16.6 kB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:26,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 30.9 MB. Free memory was 6.1 MB in the beginning and 6.1 MB in the end (delta: 40.6 kB). Peak memory consumption was 40.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 295.91 ms. Allocated memory was 40.4 MB in the beginning and 42.5 MB in the end (delta: 2.1 MB). Free memory was 20.0 MB in the beginning and 20.7 MB in the end (delta: -652.2 kB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 42.5 MB. Free memory was 20.7 MB in the beginning and 18.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 29.10 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 321.61 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 17.4 MB in the beginning and 19.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 689.10 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 18.8 MB in the beginning and 18.8 MB in the end (delta: -16.6 kB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:55:29,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:29,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:29,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:29,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:29,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:29,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:29,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:29,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:29,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:29,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:29,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:29,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:29,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:29,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:29,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:29,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:29,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:29,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:29,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:29,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:29,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:29,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:29,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:29,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:29,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:29,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:29,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:29,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:29,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:29,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:29,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:29,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:29,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:29,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:29,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:29,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:29,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:29,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:29,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:29,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:29,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:55:29,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:29,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:29,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:29,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:29,259 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:29,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:29,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:29,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:29,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:29,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:29,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:29,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:29,263 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:55:29,263 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:55:29,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:29,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:29,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:29,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:29,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:29,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:29,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:29,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:29,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:29,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:29,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:29,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:29,267 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:55:29,267 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:55:29,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:29,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:29,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:55:29,268 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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(reach_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 -> e439a9fedaaf98dc56cb80d5d88e0a0508b93b38 [2020-10-20 00:55:29,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:29,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:29,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:29,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:29,539 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:29,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec40.c [2020-10-20 00:55:29,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3b5b691/8ee6dbffe30641098fad601e7c28eac1/FLAG1a85dfd11 [2020-10-20 00:55:30,171 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:30,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec40.c [2020-10-20 00:55:30,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3b5b691/8ee6dbffe30641098fad601e7c28eac1/FLAG1a85dfd11 [2020-10-20 00:55:30,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3b5b691/8ee6dbffe30641098fad601e7c28eac1 [2020-10-20 00:55:30,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:30,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:30,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:30,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:30,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:30,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180485ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30, skipping insertion in model container [2020-10-20 00:55:30,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:30,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:30,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:30,805 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:30,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:30,845 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:30,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30 WrapperNode [2020-10-20 00:55:30,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:30,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:30,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:30,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:30,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:30,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:30,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:30,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:30,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... [2020-10-20 00:55:30,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:30,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:30,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:30,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:30,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 00:55:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-20 00:55:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:30,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:55:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-20 00:55:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:31,362 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:31,363 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:31,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:31 BoogieIcfgContainer [2020-10-20 00:55:31,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:31,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:31,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:31,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:31,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:30" (1/3) ... [2020-10-20 00:55:31,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1f16c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:31, skipping insertion in model container [2020-10-20 00:55:31,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:30" (2/3) ... [2020-10-20 00:55:31,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1f16c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:31, skipping insertion in model container [2020-10-20 00:55:31,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:31" (3/3) ... [2020-10-20 00:55:31,375 INFO L111 eAbstractionObserver]: Analyzing ICFG nec40.c [2020-10-20 00:55:31,387 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:31,393 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:31,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:31,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:31,433 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:31,434 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:31,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:31,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:31,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:31,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:31,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:55:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:31,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:31,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:31,457 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 383725322, now seen corresponding path program 1 times [2020-10-20 00:55:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:55:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820651461] [2020-10-20 00:55:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:55:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:55:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:31,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:55:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:31,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820651461] [2020-10-20 00:55:31,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:31,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:55:31,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044414557] [2020-10-20 00:55:31,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:55:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:31,626 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:55:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:31,643 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-20 00:55:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:31,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:31,653 INFO L225 Difference]: With dead ends: 25 [2020-10-20 00:55:31,653 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 00:55:31,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 00:55:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 00:55:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:55:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:55:31,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-10-20 00:55:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:31,692 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:55:31,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:55:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:55:31,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:31,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:31,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:55:31,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1213354159, now seen corresponding path program 1 times [2020-10-20 00:55:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:55:31,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962256486] [2020-10-20 00:55:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:55:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:55:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:31,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:55:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:32,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962256486] [2020-10-20 00:55:32,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:32,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:55:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405556418] [2020-10-20 00:55:32,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:32,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:55:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:32,050 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-10-20 00:55:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:32,094 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-20 00:55:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:55:32,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-20 00:55:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:32,096 INFO L225 Difference]: With dead ends: 18 [2020-10-20 00:55:32,096 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:55:32,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:55:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:55:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:55:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-20 00:55:32,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-10-20 00:55:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:32,110 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-20 00:55:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-20 00:55:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:32,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:32,111 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:32,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:55:32,329 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1626878186, now seen corresponding path program 1 times [2020-10-20 00:55:32,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:55:32,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328875276] [2020-10-20 00:55:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:55:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:32,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:55:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:32,492 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2020-10-20 00:55:32,494 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 00:55:32,561 INFO L625 ElimStorePlain]: treesize reduction 26, result has 51.9 percent of original size [2020-10-20 00:55:32,581 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-10-20 00:55:32,581 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:55:32,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:55:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328875276] [2020-10-20 00:55:32,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:55:32,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386429761] [2020-10-20 00:55:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:55:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:55:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:32,788 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 318 [2020-10-20 00:55:32,795 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 00:55:32,933 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2020-10-20 00:55:32,934 INFO L625 ElimStorePlain]: treesize reduction 268, result has 9.5 percent of original size [2020-10-20 00:55:32,942 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-10-20 00:55:32,943 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:55:32,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:55:32,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:55:32,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076820682] [2020-10-20 00:55:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:55:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:33,052 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 145 [2020-10-20 00:55:33,057 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 00:55:33,152 INFO L625 ElimStorePlain]: treesize reduction 117, result has 19.3 percent of original size [2020-10-20 00:55:33,161 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-10-20 00:55:33,161 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:55:33,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:55:33,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:55:33,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:55:33,189 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:55:33,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:55:33,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:33,824 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:55:33,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:33 BoogieIcfgContainer [2020-10-20 00:55:33,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:33,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:33,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:33,827 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:33,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:31" (3/4) ... [2020-10-20 00:55:33,830 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:55:33,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:33,832 INFO L168 Benchmark]: Toolchain (without parser) took 3293.72 ms. Allocated memory was 40.4 MB in the beginning and 48.8 MB in the end (delta: 8.4 MB). Free memory was 18.7 MB in the beginning and 14.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,833 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 31.5 MB. Free memory was 7.5 MB in the beginning and 7.4 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.49 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.8 MB in the beginning and 16.8 MB in the end (delta: 992.0 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 41.4 MB. Free memory was 16.7 MB in the beginning and 15.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,836 INFO L168 Benchmark]: Boogie Preprocessor took 30.47 ms. Allocated memory is still 41.4 MB. Free memory was 15.0 MB in the beginning and 13.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,836 INFO L168 Benchmark]: RCFGBuilder took 442.30 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 13.5 MB in the beginning and 14.4 MB in the end (delta: -893.1 kB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,837 INFO L168 Benchmark]: TraceAbstraction took 2458.27 ms. Allocated memory was 43.5 MB in the beginning and 48.8 MB in the end (delta: 5.2 MB). Free memory was 14.0 MB in the beginning and 15.0 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,838 INFO L168 Benchmark]: Witness Printer took 3.94 ms. Allocated memory is still 48.8 MB. Free memory was 15.0 MB in the beginning and 14.6 MB in the end (delta: 394.7 kB). Peak memory consumption was 394.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:33,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 31.5 MB. Free memory was 7.5 MB in the beginning and 7.4 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 301.49 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 17.8 MB in the beginning and 16.8 MB in the end (delta: 992.0 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 41.4 MB. Free memory was 16.7 MB in the beginning and 15.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.47 ms. Allocated memory is still 41.4 MB. Free memory was 15.0 MB in the beginning and 13.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 442.30 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 13.5 MB in the beginning and 14.4 MB in the end (delta: -893.1 kB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2458.27 ms. Allocated memory was 43.5 MB in the beginning and 48.8 MB in the end (delta: 5.2 MB). Free memory was 14.0 MB in the beginning and 15.0 MB in the end (delta: -1.1 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. * Witness Printer took 3.94 ms. Allocated memory is still 48.8 MB. Free memory was 15.0 MB in the beginning and 14.6 MB in the end (delta: 394.7 kB). Peak memory consumption was 394.7 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L13] char x[100], y[100]; [L14] int i,j,k; [L17] k = __VERIFIER_nondet_int() [L19] i = 0 [L20] EXPR x[i] [L20] COND TRUE x[i] != 0 [L21] EXPR x[i] [L21] y[i] = x[i] [L22] i++ [L20] EXPR x[i] [L20] COND FALSE !(x[i] != 0) [L24] y[i] = 0 [L26] COND TRUE k >= 0 && k < i [L27] EXPR y[k] [L27] COND TRUE y[k] != 0 [L6] COND TRUE !(cond) [L3] __assert_fail("0", "nec40.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 0 SDslu, 4 SDs, 0 SdLazy, 7 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 4 QuantifiedInterpolants, 578 SizeOfPredicates, 3 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...