./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifncompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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/ifncompf.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 19b2937af05cedee0ee8c037c66accd504b6c96d ...................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-25 19:27:16,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:27:16,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:27:16,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:27:16,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:27:16,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:27:16,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:27:16,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:27:16,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:27:16,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:27:16,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:27:16,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:27:16,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:27:16,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:27:16,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:27:16,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:27:16,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:27:16,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:27:16,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:27:16,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:27:16,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:27:16,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:27:16,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:27:16,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:27:16,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:27:16,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:27:16,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:27:16,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:27:16,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:27:16,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:27:16,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:27:16,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:27:16,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:27:16,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:27:16,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:27:16,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:27:16,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:27:16,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:27:16,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:27:16,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:27:16,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:27:16,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:27:16,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:27:16,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:27:16,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:27:16,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:27:16,563 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:27:16,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:27:16,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:27:16,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:27:16,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:27:16,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:27:16,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:27:16,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:27:16,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:27:16,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:27:16,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:27:16,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:27:16,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:27:16,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:27:16,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:27:16,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:27:16,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:27:16,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:27:16,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:27:16,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:27:16,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:27:16,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:27:16,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:27:16,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:27:16,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:27:16,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19b2937af05cedee0ee8c037c66accd504b6c96d [2020-10-25 19:27:17,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:27:17,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:27:17,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:27:17,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:27:17,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:27:17,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifncompf.c [2020-10-25 19:27:17,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518d30896/dd0b8b4f4d874c7d961cf376fe16ea2a/FLAGcb1a63af2 [2020-10-25 19:27:17,855 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:27:17,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifncompf.c [2020-10-25 19:27:17,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518d30896/dd0b8b4f4d874c7d961cf376fe16ea2a/FLAGcb1a63af2 [2020-10-25 19:27:18,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518d30896/dd0b8b4f4d874c7d961cf376fe16ea2a [2020-10-25 19:27:18,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:27:18,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:27:18,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:27:18,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:27:18,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:27:18,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff53ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18, skipping insertion in model container [2020-10-25 19:27:18,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:27:18,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:27:18,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:27:18,476 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:27:18,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:27:18,565 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:27:18,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18 WrapperNode [2020-10-25 19:27:18,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:27:18,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:27:18,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:27:18,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:27:18,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:27:18,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:27:18,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:27:18,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:27:18,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (1/1) ... [2020-10-25 19:27:18,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:27:18,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:27:18,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:27:18,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:27:18,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (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 [2020-10-25 19:27:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:27:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:27:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:27:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:27:18,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:27:18,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:27:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:27:19,137 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:27:19,138 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-10-25 19:27:19,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:27:19 BoogieIcfgContainer [2020-10-25 19:27:19,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:27:19,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:27:19,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:27:19,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:27:19,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:27:18" (1/3) ... [2020-10-25 19:27:19,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb69c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:27:19, skipping insertion in model container [2020-10-25 19:27:19,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:27:18" (2/3) ... [2020-10-25 19:27:19,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb69c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:27:19, skipping insertion in model container [2020-10-25 19:27:19,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:27:19" (3/3) ... [2020-10-25 19:27:19,170 INFO L111 eAbstractionObserver]: Analyzing ICFG ifncompf.c [2020-10-25 19:27:19,203 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:27:19,215 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:27:19,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:27:19,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:27:19,307 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:27:19,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:27:19,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:27:19,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:27:19,308 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:27:19,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:27:19,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:27:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-25 19:27:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 19:27:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:27:19,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:27:19,335 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:27:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:27:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2020-10-25 19:27:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:27:19,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600556969] [2020-10-25 19:27:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:27:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:27:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:27:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600556969] [2020-10-25 19:27:19,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:27:19,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:27:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774694851] [2020-10-25 19:27:19,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:27:19,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:27:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:27:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:27:19,556 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-10-25 19:27:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:27:19,579 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2020-10-25 19:27:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:27:19,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-25 19:27:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:27:19,591 INFO L225 Difference]: With dead ends: 51 [2020-10-25 19:27:19,592 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 19:27:19,596 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 [2020-10-25 19:27:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 19:27:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-25 19:27:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-25 19:27:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-10-25 19:27:19,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2020-10-25 19:27:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:27:19,643 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-10-25 19:27:19,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:27:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-10-25 19:27:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 19:27:19,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:27:19,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:27:19,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:27:19,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:27:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:27:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2020-10-25 19:27:19,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:27:19,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179664482] [2020-10-25 19:27:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:27:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:27:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:27:19,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179664482] [2020-10-25 19:27:19,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:27:19,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:27:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993385114] [2020-10-25 19:27:19,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:27:19,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:27:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:27:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:27:19,751 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-10-25 19:27:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:27:19,866 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-25 19:27:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:27:19,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-25 19:27:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:27:19,868 INFO L225 Difference]: With dead ends: 56 [2020-10-25 19:27:19,869 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 19:27:19,870 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 [2020-10-25 19:27:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 19:27:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-25 19:27:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 19:27:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-25 19:27:19,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2020-10-25 19:27:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:27:19,879 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-25 19:27:19,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:27:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-25 19:27:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 19:27:19,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:27:19,881 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] [2020-10-25 19:27:19,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:27:19,881 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:27:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:27:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2020-10-25 19:27:19,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:27:19,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126733601] [2020-10-25 19:27:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:27:19,933 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:27:19,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130661690] [2020-10-25 19:27:19,938 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 [2020-10-25 19:27:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:27:20,066 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:27:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:27:20,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:27:20,131 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:27:20,131 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:27:20,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 19:27:20,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:27:20 BoogieIcfgContainer [2020-10-25 19:27:20,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:27:20,414 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:27:20,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:27:20,415 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:27:20,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:27:19" (3/4) ... [2020-10-25 19:27:20,418 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:27:20,489 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:27:20,490 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:27:20,493 INFO L168 Benchmark]: Toolchain (without parser) took 2287.04 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 35.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,493 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 46.1 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:27:20,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.38 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 24.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,495 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.03 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,496 INFO L168 Benchmark]: Boogie Preprocessor took 69.85 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 21.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,497 INFO L168 Benchmark]: RCFGBuilder took 430.37 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.7 MB in the beginning and 40.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,498 INFO L168 Benchmark]: TraceAbstraction took 1265.17 ms. Allocated memory is still 56.6 MB. Free memory was 40.4 MB in the beginning and 39.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,499 INFO L168 Benchmark]: Witness Printer took 75.30 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 35.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:27:20,504 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 46.1 MB. Free memory is still 26.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.38 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 24.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.03 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.85 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 21.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 430.37 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.7 MB in the beginning and 40.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1265.17 ms. Allocated memory is still 56.6 MB. Free memory was 40.4 MB in the beginning and 39.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. * Witness Printer took 75.30 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 35.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 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 *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=1] [L32] COND TRUE i