./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2iff.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/s2iff.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 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 14:12:11,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 14:12:11,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 14:12:11,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 14:12:11,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 14:12:11,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 14:12:11,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 14:12:11,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 14:12:11,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 14:12:11,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 14:12:11,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 14:12:11,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 14:12:11,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 14:12:11,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 14:12:11,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 14:12:11,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 14:12:11,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 14:12:11,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 14:12:11,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 14:12:11,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 14:12:11,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 14:12:11,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 14:12:11,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 14:12:11,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 14:12:11,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 14:12:11,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 14:12:11,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 14:12:11,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 14:12:11,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 14:12:11,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 14:12:11,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 14:12:11,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 14:12:11,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 14:12:11,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 14:12:11,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 14:12:11,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 14:12:11,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 14:12:11,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 14:12:11,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 14:12:11,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 14:12:11,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 14:12:11,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 14:12:11,728 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 14:12:11,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 14:12:11,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 14:12:11,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 14:12:11,730 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 14:12:11,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 14:12:11,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 14:12:11,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 14:12:11,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 14:12:11,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 14:12:11,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 14:12:11,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 14:12:11,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 14:12:11,733 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 14:12:11,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 14:12:11,733 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 14:12:11,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 14:12:11,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 14:12:11,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 14:12:11,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 14:12:11,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 14:12:11,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 14:12:11,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 14:12:11,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 14:12:11,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 14:12:11,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 14:12:11,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 14:12:11,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 14:12:11,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 14:12:11,737 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 -> 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b [2019-11-28 14:12:12,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 14:12:12,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 14:12:12,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 14:12:12,055 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 14:12:12,055 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 14:12:12,056 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2iff.c [2019-11-28 14:12:12,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c79dd4bc/13dda041d4844c1693d8af16d64d2475/FLAG8a58dc9e8 [2019-11-28 14:12:12,543 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 14:12:12,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2iff.c [2019-11-28 14:12:12,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c79dd4bc/13dda041d4844c1693d8af16d64d2475/FLAG8a58dc9e8 [2019-11-28 14:12:12,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c79dd4bc/13dda041d4844c1693d8af16d64d2475 [2019-11-28 14:12:12,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 14:12:12,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 14:12:12,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 14:12:12,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 14:12:12,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 14:12:12,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:12:12" (1/1) ... [2019-11-28 14:12:12,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca64627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:12, skipping insertion in model container [2019-11-28 14:12:12,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:12:12" (1/1) ... [2019-11-28 14:12:12,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 14:12:12,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 14:12:13,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 14:12:13,099 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 14:12:13,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 14:12:13,136 INFO L208 MainTranslator]: Completed translation [2019-11-28 14:12:13,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13 WrapperNode [2019-11-28 14:12:13,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 14:12:13,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 14:12:13,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 14:12:13,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 14:12:13,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 14:12:13,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 14:12:13,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 14:12:13,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 14:12:13,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (1/1) ... [2019-11-28 14:12:13,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 14:12:13,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 14:12:13,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 14:12:13,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 14:12:13,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (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 14:12:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 14:12:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 14:12:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 14:12:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 14:12:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 14:12:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 14:12:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 14:12:13,673 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 14:12:13,673 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 14:12:13,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:12:13 BoogieIcfgContainer [2019-11-28 14:12:13,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 14:12:13,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 14:12:13,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 14:12:13,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 14:12:13,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:12:12" (1/3) ... [2019-11-28 14:12:13,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29849b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:12:13, skipping insertion in model container [2019-11-28 14:12:13,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:12:13" (2/3) ... [2019-11-28 14:12:13,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29849b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:12:13, skipping insertion in model container [2019-11-28 14:12:13,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:12:13" (3/3) ... [2019-11-28 14:12:13,699 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2019-11-28 14:12:13,732 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 14:12:13,748 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 14:12:13,774 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 14:12:13,801 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 14:12:13,801 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 14:12:13,801 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 14:12:13,802 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 14:12:13,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 14:12:13,802 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 14:12:13,802 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 14:12:13,803 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 14:12:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-28 14:12:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 14:12:13,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:13,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:13,828 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-28 14:12:13,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:13,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345733630] [2019-11-28 14:12:13,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:14,037 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 14:12:14,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345733630] [2019-11-28 14:12:14,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 14:12:14,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 14:12:14,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198705320] [2019-11-28 14:12:14,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 14:12:14,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:14,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 14:12:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 14:12:14,069 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-28 14:12:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:14,088 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-28 14:12:14,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 14:12:14,090 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-28 14:12:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:14,101 INFO L225 Difference]: With dead ends: 29 [2019-11-28 14:12:14,101 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 14:12:14,104 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 14:12:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 14:12:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 14:12:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 14:12:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-28 14:12:14,137 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-28 14:12:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:14,138 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-28 14:12:14,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 14:12:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-28 14:12:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 14:12:14,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:14,139 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:14,139 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:14,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-28 14:12:14,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:14,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998453980] [2019-11-28 14:12:14,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:14,232 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 14:12:14,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998453980] [2019-11-28 14:12:14,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 14:12:14,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 14:12:14,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316605928] [2019-11-28 14:12:14,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 14:12:14,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 14:12:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 14:12:14,237 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-28 14:12:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:14,303 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-28 14:12:14,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 14:12:14,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-28 14:12:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:14,305 INFO L225 Difference]: With dead ends: 23 [2019-11-28 14:12:14,305 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 14:12:14,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 14:12:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 14:12:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 14:12:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 14:12:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-28 14:12:14,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-28 14:12:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:14,313 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-28 14:12:14,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 14:12:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-28 14:12:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 14:12:14,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:14,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:14,316 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-28 14:12:14,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:14,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965672619] [2019-11-28 14:12:14,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 14:12:14,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965672619] [2019-11-28 14:12:14,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 14:12:14,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 14:12:14,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493723768] [2019-11-28 14:12:14,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 14:12:14,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 14:12:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 14:12:14,413 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-28 14:12:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:14,478 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-28 14:12:14,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 14:12:14,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-28 14:12:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:14,480 INFO L225 Difference]: With dead ends: 22 [2019-11-28 14:12:14,480 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 14:12:14,480 INFO L630 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 [2019-11-28 14:12:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 14:12:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-28 14:12:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 14:12:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-28 14:12:14,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-28 14:12:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:14,489 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-28 14:12:14,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 14:12:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-28 14:12:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 14:12:14,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:14,492 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:14,493 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-28 14:12:14,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:14,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276838071] [2019-11-28 14:12:14,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:14,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276838071] [2019-11-28 14:12:14,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319518522] [2019-11-28 14:12:14,982 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 14:12:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:15,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 14:12:15,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 14:12:15,137 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-28 14:12:15,138 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,155 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 14:12:15,165 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 14:12:15,166 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,179 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 14:12:15,180 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,180 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-28 14:12:15,222 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-28 14:12:15,223 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,243 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 14:12:15,244 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,244 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-28 14:12:15,469 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 14:12:15,470 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-28 14:12:15,472 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 14:12:15,515 INFO L614 ElimStorePlain]: treesize reduction 32, result has 63.2 percent of original size [2019-11-28 14:12:15,517 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-28 14:12:15,518 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-28 14:12:15,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 14:12:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:15,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 14:12:15,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-28 14:12:15,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558491300] [2019-11-28 14:12:15,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 14:12:15,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 14:12:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-28 14:12:15,623 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-11-28 14:12:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:16,290 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-28 14:12:16,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 14:12:16,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-28 14:12:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:16,297 INFO L225 Difference]: With dead ends: 33 [2019-11-28 14:12:16,298 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 14:12:16,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-11-28 14:12:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 14:12:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-28 14:12:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 14:12:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-28 14:12:16,311 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-28 14:12:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:16,311 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-28 14:12:16,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 14:12:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-28 14:12:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 14:12:16,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:16,314 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:16,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 14:12:16,528 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-28 14:12:16,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:16,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853075100] [2019-11-28 14:12:16,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853075100] [2019-11-28 14:12:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995199189] [2019-11-28 14:12:16,648 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 14:12:16,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 14:12:16,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 14:12:16,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 14:12:16,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 14:12:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:16,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 14:12:16,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 14:12:16,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912454778] [2019-11-28 14:12:16,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 14:12:16,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:16,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 14:12:16,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 14:12:16,748 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-28 14:12:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:16,922 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-28 14:12:16,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 14:12:16,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-28 14:12:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:16,924 INFO L225 Difference]: With dead ends: 31 [2019-11-28 14:12:16,924 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 14:12:16,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-28 14:12:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 14:12:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-28 14:12:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 14:12:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-28 14:12:16,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-28 14:12:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:16,937 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-28 14:12:16,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 14:12:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-28 14:12:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 14:12:16,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:16,942 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:17,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 14:12:17,143 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:17,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-28 14:12:17,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:17,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759660078] [2019-11-28 14:12:17,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 14:12:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:17,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759660078] [2019-11-28 14:12:17,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007942157] [2019-11-28 14:12:17,238 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 14:12:17,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 14:12:17,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 14:12:17,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 14:12:17,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 14:12:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 14:12:17,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 14:12:17,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 14:12:17,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43374404] [2019-11-28 14:12:17,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 14:12:17,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 14:12:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 14:12:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 14:12:17,331 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-28 14:12:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 14:12:17,431 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-28 14:12:17,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 14:12:17,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-28 14:12:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 14:12:17,433 INFO L225 Difference]: With dead ends: 35 [2019-11-28 14:12:17,433 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 14:12:17,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-28 14:12:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 14:12:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-28 14:12:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 14:12:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-28 14:12:17,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-28 14:12:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 14:12:17,440 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-28 14:12:17,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 14:12:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-28 14:12:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 14:12:17,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 14:12:17,442 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 14:12:17,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 14:12:17,647 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 14:12:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 14:12:17,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-28 14:12:17,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 14:12:17,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644468810] [2019-11-28 14:12:17,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 14:12:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 14:12:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 14:12:17,763 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 14:12:17,764 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 14:12:17,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:12:17 BoogieIcfgContainer [2019-11-28 14:12:17,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 14:12:17,799 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 14:12:17,799 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 14:12:17,799 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 14:12:17,800 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:12:13" (3/4) ... [2019-11-28 14:12:17,802 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 14:12:17,862 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 14:12:17,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 14:12:17,864 INFO L168 Benchmark]: Toolchain (without parser) took 4988.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 952.3 MB in the beginning and 1.2 GB in the end (delta: -233.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 14:12:17,865 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 14:12:17,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.90 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 14:12:17,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -192.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 14:12:17,867 INFO L168 Benchmark]: Boogie Preprocessor took 62.82 ms. Allocated memory is still 1.2 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 14:12:17,868 INFO L168 Benchmark]: RCFGBuilder took 366.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-28 14:12:17,868 INFO L168 Benchmark]: TraceAbstraction took 4122.35 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -84.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 14:12:17,869 INFO L168 Benchmark]: Witness Printer took 63.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2019-11-28 14:12:17,873 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 260.90 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 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 108.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -192.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.82 ms. Allocated memory is still 1.2 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 366.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4122.35 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -84.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 63.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 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 sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i