./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ss2f.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/ss2f.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 140b2ee674786865605f3bb0db5e22e6fcce8eed ........................................................................................................................................................................................................................................................................................................................................................................................... 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 22:19:13,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:19:13,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:19:13,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:19:13,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:19:13,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:19:13,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:19:13,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:19:13,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:19:13,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:19:13,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:19:13,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:19:13,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:19:13,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:19:13,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:19:13,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:19:13,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:19:13,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:19:13,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:19:13,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:19:13,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:19:13,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:19:13,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:19:13,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:19:13,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:19:13,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:19:13,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:19:13,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:19:13,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:19:13,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:19:13,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:19:13,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:19:13,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:19:13,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:19:13,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:19:13,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:19:13,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:19:13,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:19:13,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:19:13,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:19:13,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:19:13,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:19:13,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:19:13,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:19:13,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:19:13,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:19:13,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:19:13,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:19:13,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:19:13,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:19:13,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:19:13,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:19:13,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:19:13,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:19:13,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:19:13,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:19:13,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:19:13,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:19:13,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:19:13,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:19:13,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:19:13,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:19:13,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:19:13,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:19:13,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:19:13,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:19:13,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:19:13,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:19:13,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:19:13,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:19:13,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:19:13,494 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 -> 140b2ee674786865605f3bb0db5e22e6fcce8eed [2020-10-19 22:19:13,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:19:13,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:19:13,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:19:13,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:19:13,728 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:19:13,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ss2f.c [2020-10-19 22:19:13,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4850efeac/994dc5c4c50d45e19be55ab32e3a4b2a/FLAG3b4c9c907 [2020-10-19 22:19:14,264 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:19:14,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss2f.c [2020-10-19 22:19:14,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4850efeac/994dc5c4c50d45e19be55ab32e3a4b2a/FLAG3b4c9c907 [2020-10-19 22:19:14,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4850efeac/994dc5c4c50d45e19be55ab32e3a4b2a [2020-10-19 22:19:14,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:19:14,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:19:14,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:14,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:19:14,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:19:14,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:14" (1/1) ... [2020-10-19 22:19:14,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368729ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:14, skipping insertion in model container [2020-10-19 22:19:14,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:14" (1/1) ... [2020-10-19 22:19:14,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:19:14,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:19:15,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:15,134 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:19:15,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:15,216 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:19:15,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15 WrapperNode [2020-10-19 22:19:15,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:15,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:15,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:19:15,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:19:15,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:15,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:19:15,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:19:15,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:19:15,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (1/1) ... [2020-10-19 22:19:15,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:19:15,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:19:15,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:19:15,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:19:15,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (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 22:19:15,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:19:15,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:19:15,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:19:15,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:19:15,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:19:15,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:19:15,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:19:15,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:19:15,689 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:19:15,689 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-19 22:19:15,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:15 BoogieIcfgContainer [2020-10-19 22:19:15,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:19:15,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:19:15,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:19:15,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:19:15,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:19:14" (1/3) ... [2020-10-19 22:19:15,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5eef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:15, skipping insertion in model container [2020-10-19 22:19:15,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:15" (2/3) ... [2020-10-19 22:19:15,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5eef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:15, skipping insertion in model container [2020-10-19 22:19:15,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:15" (3/3) ... [2020-10-19 22:19:15,707 INFO L111 eAbstractionObserver]: Analyzing ICFG ss2f.c [2020-10-19 22:19:15,720 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:19:15,727 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:19:15,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:19:15,777 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:19:15,778 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:19:15,778 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:19:15,778 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:19:15,779 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:19:15,779 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:19:15,779 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:19:15,779 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:19:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-19 22:19:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:19:15,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:15,811 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] [2020-10-19 22:19:15,812 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:15,819 INFO L82 PathProgramCache]: Analyzing trace with hash -642180410, now seen corresponding path program 1 times [2020-10-19 22:19:15,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:15,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795618344] [2020-10-19 22:19:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:16,007 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 22:19:16,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795618344] [2020-10-19 22:19:16,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:16,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:19:16,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146317926] [2020-10-19 22:19:16,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:19:16,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:19:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:19:16,029 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-10-19 22:19:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:16,062 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2020-10-19 22:19:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:19:16,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2020-10-19 22:19:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:16,074 INFO L225 Difference]: With dead ends: 63 [2020-10-19 22:19:16,075 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:19:16,078 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 22:19:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:19:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-19 22:19:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 22:19:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-19 22:19:16,110 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2020-10-19 22:19:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:16,110 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-19 22:19:16,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:19:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-19 22:19:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:19:16,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:16,112 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] [2020-10-19 22:19:16,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:19:16,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1011332042, now seen corresponding path program 1 times [2020-10-19 22:19:16,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:16,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618285037] [2020-10-19 22:19:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:16,198 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 22:19:16,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618285037] [2020-10-19 22:19:16,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:16,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:19:16,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697221313] [2020-10-19 22:19:16,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:16,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:19:16,203 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-19 22:19:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:16,334 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-10-19 22:19:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:16,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 22:19:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:16,336 INFO L225 Difference]: With dead ends: 69 [2020-10-19 22:19:16,336 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 22:19:16,338 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 22:19:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 22:19:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-10-19 22:19:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-19 22:19:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-19 22:19:16,347 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-10-19 22:19:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:16,348 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-19 22:19:16,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-19 22:19:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:19:16,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:16,350 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, 1] [2020-10-19 22:19:16,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:19:16,350 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1890076394, now seen corresponding path program 1 times [2020-10-19 22:19:16,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:16,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178128244] [2020-10-19 22:19:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:16,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:19:16,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659370451] [2020-10-19 22:19:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:19:16,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:19:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:19:16,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:19:16,561 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:19:16,562 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:19:16,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:19:16,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:19:16 BoogieIcfgContainer [2020-10-19 22:19:16,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:19:16,858 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:19:16,858 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:19:16,858 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:19:16,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:15" (3/4) ... [2020-10-19 22:19:16,865 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:19:16,948 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:19:16,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:19:16,952 INFO L168 Benchmark]: Toolchain (without parser) took 2188.39 ms. Allocated memory was 34.1 MB in the beginning and 47.7 MB in the end (delta: 13.6 MB). Free memory was 14.8 MB in the beginning and 12.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,952 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 32.5 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 449.11 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 13.9 MB in the beginning and 22.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.76 ms. Allocated memory is still 42.5 MB. Free memory was 22.5 MB in the beginning and 20.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,955 INFO L168 Benchmark]: Boogie Preprocessor took 29.35 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 18.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,955 INFO L168 Benchmark]: RCFGBuilder took 385.85 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 18.7 MB in the beginning and 10.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,956 INFO L168 Benchmark]: TraceAbstraction took 1164.85 ms. Allocated memory was 44.0 MB in the beginning and 47.7 MB in the end (delta: 3.7 MB). Free memory was 10.3 MB in the beginning and 16.9 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:19:16,957 INFO L168 Benchmark]: Witness Printer took 91.09 ms. Allocated memory is still 47.7 MB. Free memory was 16.9 MB in the beginning and 13.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:16,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 32.5 MB. Free memory was 9.8 MB in the beginning and 9.8 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 449.11 ms. Allocated memory was 34.1 MB in the beginning and 42.5 MB in the end (delta: 8.4 MB). Free memory was 13.9 MB in the beginning and 22.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 56.76 ms. Allocated memory is still 42.5 MB. Free memory was 22.5 MB in the beginning and 20.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 29.35 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 18.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 385.85 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 18.7 MB in the beginning and 10.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1164.85 ms. Allocated memory was 44.0 MB in the beginning and 47.7 MB in the end (delta: 3.7 MB). Free memory was 10.3 MB in the beginning and 16.9 MB in the end (delta: -6.6 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 91.09 ms. Allocated memory is still 47.7 MB. Free memory was 16.9 MB in the beginning and 13.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 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] long long *a = malloc(sizeof(long long)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i