./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs4f.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/brs4f.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 7ac7e9ad2bcd8f9b205fc7710f870fc639029596 ............................................................................................................................................................................................................................................................................................................................................. 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 22:10:44,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:10:44,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:10:44,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:10:44,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:10:44,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:10:44,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:10:44,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:10:44,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:10:44,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:10:44,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:10:44,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:10:44,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:10:44,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:10:44,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:10:44,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:10:44,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:10:44,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:10:44,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:10:44,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:10:44,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:10:44,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:10:44,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:10:44,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:10:44,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:10:44,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:10:44,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:10:44,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:10:44,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:10:44,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:10:44,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:10:44,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:10:44,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:10:44,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:10:44,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:10:44,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:10:44,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:10:44,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:10:44,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:10:44,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:10:44,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:10:44,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:10:44,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:10:44,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:10:44,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:10:44,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:10:44,735 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:10:44,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:10:44,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:10:44,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:10:44,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:10:44,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:10:44,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:10:44,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:10:44,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:10:44,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:10:44,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:10:44,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:10:44,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:10:44,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:10:44,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:10:44,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:10:44,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:10:44,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:10:44,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:10:44,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:10:44,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:10:44,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:10:44,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:10:44,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:10:44,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:10:44,742 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 -> 7ac7e9ad2bcd8f9b205fc7710f870fc639029596 [2020-10-19 22:10:44,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:10:44,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:10:44,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:10:44,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:10:44,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:10:44,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs4f.c [2020-10-19 22:10:45,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44b10b6b6/f9e39fc76ef34c6089a6b956b4ec3456/FLAG19c147f12 [2020-10-19 22:10:45,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:10:45,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs4f.c [2020-10-19 22:10:45,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44b10b6b6/f9e39fc76ef34c6089a6b956b4ec3456/FLAG19c147f12 [2020-10-19 22:10:45,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44b10b6b6/f9e39fc76ef34c6089a6b956b4ec3456 [2020-10-19 22:10:45,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:10:45,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:10:45,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:10:45,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:10:45,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:10:45,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:10:45" (1/1) ... [2020-10-19 22:10:45,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fadeb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:45, skipping insertion in model container [2020-10-19 22:10:45,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:10:45" (1/1) ... [2020-10-19 22:10:45,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:10:45,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:10:46,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:10:46,159 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:10:46,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:10:46,200 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:10:46,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46 WrapperNode [2020-10-19 22:10:46,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:10:46,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:10:46,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:10:46,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:10:46,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:10:46,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:10:46,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:10:46,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:10:46,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (1/1) ... [2020-10-19 22:10:46,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:10:46,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:10:46,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:10:46,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:10:46,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (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 22:10:46,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:10:46,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:10:46,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:10:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:10:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:10:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:10:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:10:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:10:46,662 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:10:46,663 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:10:46,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:46 BoogieIcfgContainer [2020-10-19 22:10:46,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:10:46,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:10:46,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:10:46,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:10:46,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:10:45" (1/3) ... [2020-10-19 22:10:46,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23760a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:10:46, skipping insertion in model container [2020-10-19 22:10:46,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:46" (2/3) ... [2020-10-19 22:10:46,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23760a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:10:46, skipping insertion in model container [2020-10-19 22:10:46,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:46" (3/3) ... [2020-10-19 22:10:46,674 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-10-19 22:10:46,685 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:10:46,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:10:46,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:10:46,730 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:10:46,730 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:10:46,731 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:10:46,731 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:10:46,731 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:10:46,731 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:10:46,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:10:46,732 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:10:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-19 22:10:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:10:46,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:46,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:46,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2020-10-19 22:10:46,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:46,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641729222] [2020-10-19 22:10:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:46,913 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 22:10:46,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641729222] [2020-10-19 22:10:46,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:10:46,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:10:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878340498] [2020-10-19 22:10:46,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:10:46,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:10:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:10:46,936 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-10-19 22:10:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:46,955 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-10-19 22:10:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:10:46,956 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:10:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:46,964 INFO L225 Difference]: With dead ends: 37 [2020-10-19 22:10:46,965 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 22:10:46,968 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 22:10:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 22:10:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 22:10:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 22:10:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-19 22:10:46,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-10-19 22:10:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:46,998 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-19 22:10:46,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:10:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-19 22:10:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:10:46,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:46,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:46,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:10:47,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2020-10-19 22:10:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:47,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748911739] [2020-10-19 22:10:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:47,081 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 22:10:47,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748911739] [2020-10-19 22:10:47,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:10:47,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:10:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855113553] [2020-10-19 22:10:47,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:10:47,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:47,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:10:47,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:10:47,086 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2020-10-19 22:10:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:47,173 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-10-19 22:10:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:10:47,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:10:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:47,175 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:10:47,175 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 22:10:47,176 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 22:10:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 22:10:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-19 22:10:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 22:10:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-19 22:10:47,183 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2020-10-19 22:10:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:47,183 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-19 22:10:47,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:10:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-19 22:10:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:10:47,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:47,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:47,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:10:47,185 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2020-10-19 22:10:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:47,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547284809] [2020-10-19 22:10:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:10:47,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:10:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:10:47,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:10:47,343 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:10:47,343 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:10:47,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:10:47,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:10:47 BoogieIcfgContainer [2020-10-19 22:10:47,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:10:47,381 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:10:47,381 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:10:47,381 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:10:47,382 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:46" (3/4) ... [2020-10-19 22:10:47,384 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:10:47,449 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:10:47,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:10:47,452 INFO L168 Benchmark]: Toolchain (without parser) took 1607.65 ms. Allocated memory was 35.7 MB in the beginning and 49.3 MB in the end (delta: 13.6 MB). Free memory was 7.8 MB in the beginning and 14.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,453 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 35.7 MB. Free memory was 13.8 MB in the beginning and 13.8 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.86 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 7.0 MB in the beginning and 26.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.15 ms. Allocated memory is still 45.1 MB. Free memory was 26.6 MB in the beginning and 24.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,455 INFO L168 Benchmark]: Boogie Preprocessor took 27.44 ms. Allocated memory is still 45.1 MB. Free memory was 24.8 MB in the beginning and 23.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,456 INFO L168 Benchmark]: RCFGBuilder took 392.58 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 23.3 MB in the beginning and 19.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,456 INFO L168 Benchmark]: TraceAbstraction took 714.65 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 19.2 MB in the beginning and 17.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,457 INFO L168 Benchmark]: Witness Printer took 68.35 ms. Allocated memory is still 49.3 MB. Free memory was 17.5 MB in the beginning and 14.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:47,462 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 35.7 MB. Free memory was 13.8 MB in the beginning and 13.8 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 351.86 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 7.0 MB in the beginning and 26.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 42.15 ms. Allocated memory is still 45.1 MB. Free memory was 26.6 MB in the beginning and 24.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 27.44 ms. Allocated memory is still 45.1 MB. Free memory was 24.8 MB in the beginning and 23.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 392.58 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 23.3 MB in the beginning and 19.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 714.65 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 19.2 MB in the beginning and 17.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. * Witness Printer took 68.35 ms. Allocated memory is still 49.3 MB. Free memory was 17.5 MB in the beginning and 14.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 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] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i