./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2f.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/array-fpi/res2f.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 d4908701bc858db819ac584f6da9ed504c4033b1 ................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:15:49,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:15:49,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:15:49,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:15:49,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:15:49,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:15:49,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:15:49,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:15:49,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:15:49,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:15:49,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:15:49,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:15:49,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:15:49,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:15:49,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:15:49,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:15:49,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:15:49,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:15:49,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:15:49,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:15:49,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:15:49,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:15:49,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:15:49,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:15:49,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:15:49,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:15:49,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:15:49,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:15:49,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:15:49,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:15:49,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:15:49,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:15:49,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:15:49,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:15:49,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:15:49,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:15:49,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:15:49,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:15:49,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:15:49,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:15:49,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:15:49,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:15:49,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:15:49,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:15:49,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:15:49,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:15:49,396 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:15:49,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:15:49,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:15:49,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:15:49,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:15:49,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:15:49,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:15:49,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:15:49,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:15:49,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:15:49,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:15:49,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:15:49,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:15:49,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:15:49,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:15:49,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:15:49,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:15:49,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:15:49,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:15:49,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:15:49,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:15:49,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:15:49,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:15:49,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:15:49,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:15:49,402 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 -> d4908701bc858db819ac584f6da9ed504c4033b1 [2020-10-19 22:15:49,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:15:49,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:15:49,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:15:49,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:15:49,660 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:15:49,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2f.c [2020-10-19 22:15:49,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cc04c24/ac3ab13a7ce142a8a55660cbd2fc83aa/FLAG580f2914e [2020-10-19 22:15:50,310 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:15:50,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2f.c [2020-10-19 22:15:50,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cc04c24/ac3ab13a7ce142a8a55660cbd2fc83aa/FLAG580f2914e [2020-10-19 22:15:50,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cc04c24/ac3ab13a7ce142a8a55660cbd2fc83aa [2020-10-19 22:15:50,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:15:50,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:15:50,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:50,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:15:50,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:15:50,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:50" (1/1) ... [2020-10-19 22:15:50,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a2b722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:50, skipping insertion in model container [2020-10-19 22:15:50,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:50" (1/1) ... [2020-10-19 22:15:50,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:15:50,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:15:50,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:50,973 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:15:51,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:51,030 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:15:51,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51 WrapperNode [2020-10-19 22:15:51,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:51,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:51,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:15:51,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:15:51,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:51,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:15:51,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:15:51,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:15:51,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (1/1) ... [2020-10-19 22:15:51,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:15:51,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:15:51,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:15:51,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:15:51,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (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 [2020-10-19 22:15:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:15:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:15:51,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:15:51,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:15:51,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:15:51,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:15:51,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:15:51,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:15:51,563 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:15:51,564 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-19 22:15:51,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:51 BoogieIcfgContainer [2020-10-19 22:15:51,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:15:51,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:15:51,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:15:51,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:15:51,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:15:50" (1/3) ... [2020-10-19 22:15:51,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1866bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:51, skipping insertion in model container [2020-10-19 22:15:51,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:51" (2/3) ... [2020-10-19 22:15:51,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1866bb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:51, skipping insertion in model container [2020-10-19 22:15:51,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:51" (3/3) ... [2020-10-19 22:15:51,576 INFO L111 eAbstractionObserver]: Analyzing ICFG res2f.c [2020-10-19 22:15:51,589 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:15:51,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:15:51,613 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:15:51,658 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:15:51,659 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:15:51,659 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:15:51,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:15:51,660 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:15:51,660 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:15:51,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:15:51,661 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:15:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-19 22:15:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:15:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:51,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:51,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2020-10-19 22:15:51,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:51,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790045710] [2020-10-19 22:15:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:15:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:15:51,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790045710] [2020-10-19 22:15:51,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:15:51,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:15:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326673280] [2020-10-19 22:15:51,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:15:51,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:15:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:15:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:15:51,943 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-19 22:15:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:15:51,963 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-19 22:15:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:15:51,964 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-19 22:15:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:15:51,976 INFO L225 Difference]: With dead ends: 57 [2020-10-19 22:15:51,976 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 22:15:51,980 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 [2020-10-19 22:15:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 22:15:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-19 22:15:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 22:15:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-19 22:15:52,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2020-10-19 22:15:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:15:52,020 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-19 22:15:52,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:15:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-19 22:15:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:15:52,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:52,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:52,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:15:52,022 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2020-10-19 22:15:52,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:52,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097652843] [2020-10-19 22:15:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:15:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:15:52,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097652843] [2020-10-19 22:15:52,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:15:52,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:15:52,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523587578] [2020-10-19 22:15:52,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:15:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:15:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:15:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:15:52,206 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-19 22:15:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:15:52,340 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-19 22:15:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:15:52,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 22:15:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:15:52,341 INFO L225 Difference]: With dead ends: 57 [2020-10-19 22:15:52,342 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 22:15:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:15:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 22:15:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-19 22:15:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 22:15:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-19 22:15:52,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2020-10-19 22:15:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:15:52,358 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-19 22:15:52,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:15:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-19 22:15:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 22:15:52,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:52,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:52,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:15:52,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2020-10-19 22:15:52,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:52,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52096413] [2020-10-19 22:15:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:52,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:52,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:52,621 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:15:52,622 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:15:52,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:15:52,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:15:52 BoogieIcfgContainer [2020-10-19 22:15:52,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:15:52,682 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:15:52,682 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:15:52,682 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:15:52,683 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:51" (3/4) ... [2020-10-19 22:15:52,685 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:15:52,765 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:15:52,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:15:52,768 INFO L168 Benchmark]: Toolchain (without parser) took 2082.75 ms. Allocated memory was 39.8 MB in the beginning and 45.6 MB in the end (delta: 5.8 MB). Free memory was 18.1 MB in the beginning and 17.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,769 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 30.9 MB. Free memory was 6.3 MB in the beginning and 6.3 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.63 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 17.2 MB in the beginning and 16.3 MB in the end (delta: 849.5 kB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.03 ms. Allocated memory is still 40.9 MB. Free memory was 16.2 MB in the beginning and 14.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,772 INFO L168 Benchmark]: Boogie Preprocessor took 53.58 ms. Allocated memory is still 40.9 MB. Free memory was 14.3 MB in the beginning and 12.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,772 INFO L168 Benchmark]: RCFGBuilder took 426.01 ms. Allocated memory was 40.9 MB in the beginning and 42.5 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 23.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,773 INFO L168 Benchmark]: TraceAbstraction took 1113.83 ms. Allocated memory was 42.5 MB in the beginning and 45.6 MB in the end (delta: 3.1 MB). Free memory was 22.7 MB in the beginning and 21.9 MB in the end (delta: 759.2 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,774 INFO L168 Benchmark]: Witness Printer took 84.07 ms. Allocated memory is still 45.6 MB. Free memory was 21.6 MB in the beginning and 17.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:52,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 30.9 MB. Free memory was 6.3 MB in the beginning and 6.3 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 339.63 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 17.2 MB in the beginning and 16.3 MB in the end (delta: 849.5 kB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 54.03 ms. Allocated memory is still 40.9 MB. Free memory was 16.2 MB in the beginning and 14.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 53.58 ms. Allocated memory is still 40.9 MB. Free memory was 14.3 MB in the beginning and 12.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 426.01 ms. Allocated memory was 40.9 MB in the beginning and 42.5 MB in the end (delta: 1.6 MB). Free memory was 12.7 MB in the beginning and 23.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1113.83 ms. Allocated memory was 42.5 MB in the beginning and 45.6 MB in the end (delta: 3.1 MB). Free memory was 22.7 MB in the beginning and 21.9 MB in the end (delta: 759.2 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. * Witness Printer took 84.07 ms. Allocated memory is still 45.6 MB. Free memory was 21.6 MB in the beginning and 17.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 1 [L34] i=0 VAL [N=1] [L34] COND TRUE i