./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/eqn4f.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bda1393a6cae8c0593c13e5d45241d07ffdf29fb ............................................................................................................................................................................................................................................................................................ 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-f470102 [2019-11-28 15:33:46,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:33:46,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:33:46,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:33:46,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:33:46,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:33:46,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:33:46,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:33:46,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:33:46,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:33:46,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:33:46,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:33:46,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:33:46,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:33:46,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:33:46,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:33:46,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:33:46,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:33:46,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:33:46,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:33:46,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:33:46,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:33:46,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:33:46,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:33:46,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:33:46,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:33:46,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:33:46,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:33:46,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:33:46,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:33:46,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:33:46,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:33:46,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:33:46,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:33:46,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:33:46,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:33:46,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:33:46,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:33:46,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:33:46,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:33:46,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:33:46,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:33:46,650 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:33:46,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:33:46,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:33:46,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:33:46,653 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:33:46,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:33:46,654 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:33:46,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:33:46,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:33:46,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:33:46,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:33:46,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:33:46,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:33:46,657 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:33:46,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:33:46,658 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:33:46,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:33:46,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:33:46,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:33:46,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:33:46,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:33:46,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:33:46,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:33:46,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:33:46,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:33:46,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:33:46,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:33:46,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:33:46,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:33:46,662 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(__VERIFIER_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 -> bda1393a6cae8c0593c13e5d45241d07ffdf29fb [2019-11-28 15:33:46,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:33:46,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:33:46,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:33:46,987 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:33:46,988 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:33:46,989 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4f.c [2019-11-28 15:33:47,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ac0e083/c8afdbf2cdfd41669ce3401f0352a656/FLAGc36a5e621 [2019-11-28 15:33:47,496 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:33:47,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4f.c [2019-11-28 15:33:47,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ac0e083/c8afdbf2cdfd41669ce3401f0352a656/FLAGc36a5e621 [2019-11-28 15:33:47,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ac0e083/c8afdbf2cdfd41669ce3401f0352a656 [2019-11-28 15:33:47,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:33:47,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:33:47,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:47,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:33:47,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:33:47,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:47" (1/1) ... [2019-11-28 15:33:47,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e137d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:47, skipping insertion in model container [2019-11-28 15:33:47,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:47" (1/1) ... [2019-11-28 15:33:47,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:33:47,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:33:48,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:48,125 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:33:48,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:48,158 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:33:48,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48 WrapperNode [2019-11-28 15:33:48,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:48,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:48,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:33:48,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:33:48,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:48,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:33:48,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:33:48,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:33:48,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (1/1) ... [2019-11-28 15:33:48,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:33:48,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:33:48,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:33:48,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:33:48,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (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 [2019-11-28 15:33:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:33:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:33:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:33:48,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:33:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:33:48,576 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:33:48,577 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 15:33:48,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:48 BoogieIcfgContainer [2019-11-28 15:33:48,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:33:48,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:33:48,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:33:48,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:33:48,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:47" (1/3) ... [2019-11-28 15:33:48,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1502bb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:48, skipping insertion in model container [2019-11-28 15:33:48,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:48" (2/3) ... [2019-11-28 15:33:48,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1502bb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:48, skipping insertion in model container [2019-11-28 15:33:48,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:48" (3/3) ... [2019-11-28 15:33:48,595 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn4f.c [2019-11-28 15:33:48,607 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:33:48,617 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:33:48,652 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:33:48,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:33:48,679 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:33:48,679 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:33:48,679 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:33:48,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:33:48,680 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:33:48,680 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:33:48,680 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:33:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 15:33:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:33:48,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:48,708 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:48,708 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-28 15:33:48,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:48,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948977387] [2019-11-28 15:33:48,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:48,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948977387] [2019-11-28 15:33:48,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:48,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:33:48,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135057969] [2019-11-28 15:33:48,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:33:48,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:33:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:48,869 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-28 15:33:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:48,896 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-28 15:33:48,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:33:48,898 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 15:33:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:48,911 INFO L225 Difference]: With dead ends: 33 [2019-11-28 15:33:48,912 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 15:33:48,921 INFO L630 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 [2019-11-28 15:33:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 15:33:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 15:33:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 15:33:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-28 15:33:48,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-28 15:33:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:48,966 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-28 15:33:48,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:33:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-28 15:33:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:33:48,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:48,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:48,969 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-28 15:33:48,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:48,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373432409] [2019-11-28 15:33:48,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:49,031 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:49,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932525959] [2019-11-28 15:33:49,035 INFO L94 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 [2019-11-28 15:33:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:49,182 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:33:49,183 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:33:49,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:49,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:33:49 BoogieIcfgContainer [2019-11-28 15:33:49,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:33:49,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:33:49,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:33:49,414 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:33:49,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:48" (3/4) ... [2019-11-28 15:33:49,416 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:33:49,461 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:33:49,462 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:33:49,464 INFO L168 Benchmark]: Toolchain (without parser) took 1577.58 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 957.7 MB in the beginning and 1.0 GB in the end (delta: -86.6 MB). Peak memory consumption was 31.4 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,465 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:33:49,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.18 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,467 INFO L168 Benchmark]: Boogie Procedure Inliner took 95.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,468 INFO L168 Benchmark]: Boogie Preprocessor took 27.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,469 INFO L168 Benchmark]: RCFGBuilder took 295.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,470 INFO L168 Benchmark]: TraceAbstraction took 833.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,471 INFO L168 Benchmark]: Witness Printer took 48.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:49,477 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 272.18 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 95.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 295.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 833.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 11.5 GB. * Witness Printer took 48.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 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: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 8 [L27] b[0] = 0 [L28] i=1 VAL [N=1] [L28] COND FALSE !(i