./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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/recursive-simple/id_i5_o5-2.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 e05793781d8e05fe8376a30b6751438f3b1a9d08 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:25:48,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:48,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:48,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:48,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:48,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:48,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:48,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:48,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:48,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:48,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:48,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:48,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:48,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:48,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:48,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:48,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:48,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:48,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:48,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:48,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:48,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:48,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:48,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:48,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:48,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:48,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:48,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:48,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:48,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:48,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:48,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:48,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:48,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:48,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:48,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:48,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:48,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:48,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:48,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:48,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:48,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:48,248 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:48,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:48,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:48,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:48,251 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:48,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:48,251 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:48,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:48,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:48,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:48,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:48,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:48,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:48,253 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:48,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:48,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:48,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:48,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:48,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:48,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:48,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:48,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:48,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:48,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:48,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:48,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:48,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:48,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:48,257 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 -> e05793781d8e05fe8376a30b6751438f3b1a9d08 [2019-11-28 00:25:48,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:48,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:48,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:48,569 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:48,570 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:48,571 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2019-11-28 00:25:48,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a1d1df7/310b63b2074a435682db7a99059689ae/FLAGf501533e4 [2019-11-28 00:25:49,155 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:49,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2019-11-28 00:25:49,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a1d1df7/310b63b2074a435682db7a99059689ae/FLAGf501533e4 [2019-11-28 00:25:49,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a1d1df7/310b63b2074a435682db7a99059689ae [2019-11-28 00:25:49,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:49,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:49,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:49,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:49,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:49,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca6a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49, skipping insertion in model container [2019-11-28 00:25:49,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:49,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:49,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:49,759 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:49,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:49,787 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:49,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49 WrapperNode [2019-11-28 00:25:49,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:49,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:49,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:49,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:49,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:49,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:49,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:49,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:49,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:49,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:49,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:49,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:49,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (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 00:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:50,101 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:50,101 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:50,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:50 BoogieIcfgContainer [2019-11-28 00:25:50,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:50,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:50,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:50,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:50,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:49" (1/3) ... [2019-11-28 00:25:50,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5160b9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:50, skipping insertion in model container [2019-11-28 00:25:50,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (2/3) ... [2019-11-28 00:25:50,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5160b9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:50, skipping insertion in model container [2019-11-28 00:25:50,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:50" (3/3) ... [2019-11-28 00:25:50,109 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2019-11-28 00:25:50,120 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:50,127 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:50,140 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:50,164 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:50,164 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:50,164 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:50,164 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:50,165 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:50,165 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:50,165 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:50,165 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:50,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,190 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,191 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:50,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243426761] [2019-11-28 00:25:50,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,380 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 00:25:50,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243426761] [2019-11-28 00:25:50,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:50,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:25:50,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972970689] [2019-11-28 00:25:50,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:25:50,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:25:50,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:25:50,424 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 00:25:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,519 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 00:25:50,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:50,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 00:25:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,532 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:50,532 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:25:50,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:25:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:25:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:25:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:25:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:25:50,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:25:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,578 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:25:50,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:25:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:25:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:25:50,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,580 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,580 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:25:50,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433791262] [2019-11-28 00:25:50,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:50,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433791262] [2019-11-28 00:25:50,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940495233] [2019-11-28 00:25:50,716 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 00:25:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:50,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 00:25:50,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017806552] [2019-11-28 00:25:50,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:25:50,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:25:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:50,841 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 00:25:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,912 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:25:50,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:25:50,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 00:25:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,914 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:25:50,914 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:50,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:25:50,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:25:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,923 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:25:50,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:25:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:25:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:25:50,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,925 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,132 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:25:51,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271806783] [2019-11-28 00:25:51,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:51,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271806783] [2019-11-28 00:25:51,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345280481] [2019-11-28 00:25:51,294 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 00:25:51,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:51,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:51,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:51,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 00:25:51,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898266905] [2019-11-28 00:25:51,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 00:25:51,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 00:25:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:25:51,377 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-28 00:25:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:51,480 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:25:51,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:51,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 00:25:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:51,482 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:51,483 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:25:51,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:25:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:25:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:25:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:25:51,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:25:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:51,497 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:25:51,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 00:25:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:25:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:25:51,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:51,502 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,706 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:25:51,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267428241] [2019-11-28 00:25:51,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:51,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267428241] [2019-11-28 00:25:51,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150757204] [2019-11-28 00:25:51,932 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 00:25:51,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 00:25:51,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:51,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:52,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-28 00:25:52,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459088882] [2019-11-28 00:25:52,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:52,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:52,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:52,045 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-28 00:25:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,155 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 00:25:52,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:52,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-28 00:25:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,157 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:25:52,158 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 00:25:52,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 00:25:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 00:25:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 00:25:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 00:25:52,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 00:25:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,172 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 00:25:52,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 00:25:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 00:25:52,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,177 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 00:25:52,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594305029] [2019-11-28 00:25:52,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:52,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594305029] [2019-11-28 00:25:52,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082193382] [2019-11-28 00:25:52,618 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,647 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:52,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:52,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:25:52,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:52,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-28 00:25:52,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954842223] [2019-11-28 00:25:52,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:52,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:52,706 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-28 00:25:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,797 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 00:25:52,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:25:52,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-28 00:25:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,799 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:25:52,799 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:52,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 00:25:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 00:25:52,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 00:25:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,807 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 00:25:52,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 00:25:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 00:25:52,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,809 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:53,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:53,013 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 00:25:53,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:53,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327069148] [2019-11-28 00:25:53,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:53,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327069148] [2019-11-28 00:25:53,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020088708] [2019-11-28 00:25:53,449 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:53,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 00:25:53,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:53,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-28 00:25:53,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:53,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:53,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-11-28 00:25:53,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572407621] [2019-11-28 00:25:53,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 00:25:53,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:53,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 00:25:53,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:53,538 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 15 states. [2019-11-28 00:25:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:53,658 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 00:25:53,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 00:25:53,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-11-28 00:25:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:53,661 INFO L225 Difference]: With dead ends: 33 [2019-11-28 00:25:53,661 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:25:53,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:25:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 00:25:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 00:25:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 00:25:53,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 00:25:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:53,675 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 00:25:53,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 00:25:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 00:25:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 00:25:53,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:53,677 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:53,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:53,879 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 00:25:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:53,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608313826] [2019-11-28 00:25:53,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:54,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608313826] [2019-11-28 00:25:54,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735941019] [2019-11-28 00:25:54,128 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,180 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 00:25:54,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:54,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 00:25:54,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:54,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:25:54,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2019-11-28 00:25:54,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785341875] [2019-11-28 00:25:54,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:54,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:25:54,242 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2019-11-28 00:25:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:54,423 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-28 00:25:54,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 00:25:54,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-11-28 00:25:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:54,425 INFO L225 Difference]: With dead ends: 29 [2019-11-28 00:25:54,425 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:25:54,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:25:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:25:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:25:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:25:54,427 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-11-28 00:25:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:54,428 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:25:54,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:25:54,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:25:54,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:25:54,661 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-28 00:25:54,662 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2019-11-28 00:25:54,663 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 00:25:54,663 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-28 00:25:54,663 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:25:54,663 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:25:54,663 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-28 00:25:54,663 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-28 00:25:54,663 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 00:25:54,664 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-28 00:25:54,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:54 BoogieIcfgContainer [2019-11-28 00:25:54,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:25:54,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:25:54,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:25:54,670 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:25:54,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:50" (3/4) ... [2019-11-28 00:25:54,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:25:54,681 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 00:25:54,685 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:25:54,685 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:25:54,725 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:25:54,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:25:54,728 INFO L168 Benchmark]: Toolchain (without parser) took 5200.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Free memory was 951.0 MB in the beginning and 1.2 GB in the end (delta: -221.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:54,729 INFO L168 Benchmark]: CDTParser took 0.28 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 00:25:54,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.37 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:54,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.52 ms. Allocated memory is still 1.0 GB. Free memory is still 940.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:54,731 INFO L168 Benchmark]: Boogie Preprocessor took 72.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:54,732 INFO L168 Benchmark]: RCFGBuilder took 211.13 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:54,732 INFO L168 Benchmark]: TraceAbstraction took 4566.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -64.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:54,733 INFO L168 Benchmark]: Witness Printer took 55.77 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:54,737 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 260.37 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 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 29.52 ms. Allocated memory is still 1.0 GB. Free memory is still 940.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 72.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 211.13 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4566.44 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -64.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 55.77 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: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 4.4s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 93 SDslu, 386 SDs, 0 SdLazy, 269 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 301 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 369 NumberOfCodeBlocks, 364 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 31888 SizeOfPredicates, 27 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 396/588 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...