./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ms2f.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/ms2f.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 ab1941c3f1e3ccfc453cc61b57def578295cf9b5 ........................................................................................................................................................................................................................................................................................................................................... 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 22:14:26,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:14:26,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:14:26,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:14:26,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:14:26,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:14:26,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:14:26,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:14:26,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:14:26,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:14:26,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:14:26,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:14:26,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:14:26,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:14:26,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:14:26,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:14:26,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:14:26,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:14:26,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:14:26,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:14:26,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:14:26,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:14:26,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:14:26,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:14:26,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:14:26,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:14:26,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:14:26,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:14:26,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:14:26,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:14:26,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:14:26,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:14:26,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:14:26,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:14:26,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:14:26,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:14:26,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:14:26,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:14:26,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:14:26,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:14:26,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:14:26,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:14:26,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:14:26,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:14:26,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:14:26,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:14:26,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:14:26,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:14:26,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:14:26,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:14:26,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:14:26,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:14:26,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:14:26,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:14:26,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:14:26,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:14:26,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:14:26,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:14:26,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:14:26,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:14:26,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:14:26,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:14:26,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:14:26,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:14:26,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:14:26,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:14:26,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:14:26,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:14:26,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:14:26,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:14:26,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:14:26,396 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 -> ab1941c3f1e3ccfc453cc61b57def578295cf9b5 [2020-10-19 22:14:26,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:14:26,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:14:26,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:14:26,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:14:26,620 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:14:26,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms2f.c [2020-10-19 22:14:26,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b95d27f2/70d50a008b7f41f4946ca62bab7e001b/FLAGfff817c01 [2020-10-19 22:14:27,163 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:14:27,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2f.c [2020-10-19 22:14:27,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b95d27f2/70d50a008b7f41f4946ca62bab7e001b/FLAGfff817c01 [2020-10-19 22:14:27,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b95d27f2/70d50a008b7f41f4946ca62bab7e001b [2020-10-19 22:14:27,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:14:27,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:14:27,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:14:27,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:14:27,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:14:27,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a2c466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27, skipping insertion in model container [2020-10-19 22:14:27,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:14:27,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:14:27,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:14:27,857 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:14:27,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:14:27,895 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:14:27,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27 WrapperNode [2020-10-19 22:14:27,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:14:27,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:14:27,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:14:27,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:14:27,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:14:27,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:14:27,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:14:27,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:14:27,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (1/1) ... [2020-10-19 22:14:27,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:14:27,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:14:27,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:14:27,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:14:27,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (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 22:14:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:14:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:14:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:14:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:14:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:14:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:14:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:14:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:14:28,281 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:14:28,282 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:14:28,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:28 BoogieIcfgContainer [2020-10-19 22:14:28,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:14:28,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:14:28,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:14:28,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:14:28,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:14:27" (1/3) ... [2020-10-19 22:14:28,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f1700b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:14:28, skipping insertion in model container [2020-10-19 22:14:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:14:27" (2/3) ... [2020-10-19 22:14:28,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f1700b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:14:28, skipping insertion in model container [2020-10-19 22:14:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:28" (3/3) ... [2020-10-19 22:14:28,293 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-10-19 22:14:28,308 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:14:28,316 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:14:28,347 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:14:28,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:14:28,383 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:14:28,383 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:14:28,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:14:28,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:14:28,384 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:14:28,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:14:28,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:14:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 22:14:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:14:28,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:28,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:28,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-10-19 22:14:28,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:28,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565562492] [2020-10-19 22:14:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:14:28,587 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 22:14:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565562492] [2020-10-19 22:14:28,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:14:28,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:14:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533285174] [2020-10-19 22:14:28,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:14:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:14:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:14:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:14:28,613 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-19 22:14:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:14:28,631 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-19 22:14:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:14:28,633 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:14:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:14:28,643 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:14:28,643 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 22:14:28,647 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 22:14:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 22:14:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 22:14:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 22:14:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-19 22:14:28,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-10-19 22:14:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:14:28,684 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 22:14:28,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:14:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-19 22:14:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:14:28,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:28,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:28,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:14:28,686 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-10-19 22:14:28,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:28,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553531428] [2020-10-19 22:14:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:14:28,772 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 22:14:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553531428] [2020-10-19 22:14:28,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:14:28,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:14:28,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886053291] [2020-10-19 22:14:28,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:14:28,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:14:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:14:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:14:28,777 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-19 22:14:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:14:28,867 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-19 22:14:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:14:28,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:14:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:14:28,869 INFO L225 Difference]: With dead ends: 28 [2020-10-19 22:14:28,869 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 22:14:28,870 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 22:14:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 22:14:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-19 22:14:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 22:14:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-19 22:14:28,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-10-19 22:14:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:14:28,877 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-19 22:14:28,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:14:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-19 22:14:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:14:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:14:28,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:14:28,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:14:28,879 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:14:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:14:28,879 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-10-19 22:14:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:14:28,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837431368] [2020-10-19 22:14:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:14:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:14:28,932 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:14:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:14:28,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:14:29,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:14:29,003 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:14:29,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:14:29,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:14:29 BoogieIcfgContainer [2020-10-19 22:14:29,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:14:29,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:14:29,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:14:29,070 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:14:29,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:14:28" (3/4) ... [2020-10-19 22:14:29,084 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:14:29,171 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:14:29,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:14:29,174 INFO L168 Benchmark]: Toolchain (without parser) took 1603.67 ms. Allocated memory was 34.1 MB in the beginning and 45.6 MB in the end (delta: 11.5 MB). Free memory was 11.4 MB in the beginning and 11.0 MB in the end (delta: 375.0 kB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,175 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 33.0 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 28.0 kB). Peak memory consumption was 28.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.81 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 10.5 MB in the beginning and 25.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,184 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 42.5 MB. Free memory was 25.0 MB in the beginning and 23.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,186 INFO L168 Benchmark]: Boogie Preprocessor took 25.57 ms. Allocated memory is still 42.5 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,190 INFO L168 Benchmark]: RCFGBuilder took 321.56 ms. Allocated memory was 42.5 MB in the beginning and 41.9 MB in the end (delta: -524.3 kB). Free memory was 21.7 MB in the beginning and 16.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,192 INFO L168 Benchmark]: TraceAbstraction took 784.68 ms. Allocated memory was 41.9 MB in the beginning and 45.6 MB in the end (delta: 3.7 MB). Free memory was 16.3 MB in the beginning and 14.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 6.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,193 INFO L168 Benchmark]: Witness Printer took 101.57 ms. Allocated memory is still 45.6 MB. Free memory was 14.0 MB in the beginning and 11.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:14:29,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 33.0 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 28.0 kB). Peak memory consumption was 28.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 320.81 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 10.5 MB in the beginning and 25.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 42.5 MB. Free memory was 25.0 MB in the beginning and 23.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 25.57 ms. Allocated memory is still 42.5 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 321.56 ms. Allocated memory was 42.5 MB in the beginning and 41.9 MB in the end (delta: -524.3 kB). Free memory was 21.7 MB in the beginning and 16.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 784.68 ms. Allocated memory was 41.9 MB in the beginning and 45.6 MB in the end (delta: 3.7 MB). Free memory was 16.3 MB in the beginning and 14.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 6.0 MB. Max. memory is 14.3 GB. * Witness Printer took 101.57 ms. Allocated memory is still 45.6 MB. Free memory was 14.0 MB in the beginning and 11.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 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] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i