./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bbff91fb2bcbd238fb97db06c7d4983c05a850 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:47:26,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:47:26,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:47:26,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:47:26,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:47:26,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:47:26,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:47:26,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:47:26,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:47:26,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:47:26,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:47:26,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:47:26,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:47:26,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:47:26,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:47:26,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:47:26,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:47:26,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:47:26,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:47:26,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:47:26,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:47:26,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:47:26,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:47:26,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:47:26,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:47:26,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:47:26,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:47:26,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:47:26,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:47:26,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:47:26,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:47:26,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:47:26,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:47:26,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:47:26,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:47:26,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:47:26,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:47:26,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:47:26,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:47:26,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:47:26,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:47:26,306 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:47:26,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:47:26,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:47:26,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:47:26,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:47:26,359 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:47:26,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:47:26,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:47:26,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:47:26,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:47:26,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:47:26,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:47:26,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:47:26,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:47:26,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:47:26,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:47:26,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:47:26,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:47:26,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:47:26,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:47:26,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:47:26,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:47:26,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:26,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:47:26,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:47:26,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:47:26,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:47:26,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:47:26,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:47:26,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:47:26,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2020-10-20 01:47:26,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:47:26,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:47:26,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:47:26,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:47:26,649 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:47:26,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-10-20 01:47:26,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b225d72f1/04ab6b520d834ef8b997b6dbd8f18964/FLAG50d1b50a4 [2020-10-20 01:47:27,378 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:47:27,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-10-20 01:47:27,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b225d72f1/04ab6b520d834ef8b997b6dbd8f18964/FLAG50d1b50a4 [2020-10-20 01:47:27,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b225d72f1/04ab6b520d834ef8b997b6dbd8f18964 [2020-10-20 01:47:27,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:47:27,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:47:27,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:27,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:47:27,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:47:27,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:27" (1/1) ... [2020-10-20 01:47:27,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336fde30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:27, skipping insertion in model container [2020-10-20 01:47:27,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:27" (1/1) ... [2020-10-20 01:47:27,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:47:27,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:47:28,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:28,066 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:47:28,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:28,105 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:47:28,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28 WrapperNode [2020-10-20 01:47:28,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:28,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:28,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:47:28,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:47:28,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:28,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:47:28,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:47:28,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:47:28,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... [2020-10-20 01:47:28,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:47:28,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:47:28,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:47:28,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:47:28,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:47:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 01:47:28,230 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 01:47:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:47:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 01:47:28,230 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 01:47:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:47:28,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:47:28,600 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:47:28,600 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:47:28,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:28 BoogieIcfgContainer [2020-10-20 01:47:28,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:47:28,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:47:28,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:47:28,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:47:28,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:47:27" (1/3) ... [2020-10-20 01:47:28,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb8ce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:28, skipping insertion in model container [2020-10-20 01:47:28,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:28" (2/3) ... [2020-10-20 01:47:28,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb8ce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:28, skipping insertion in model container [2020-10-20 01:47:28,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:28" (3/3) ... [2020-10-20 01:47:28,612 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-10-20 01:47:28,625 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:47:28,633 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:47:28,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:47:28,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:47:28,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:47:28,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:47:28,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:47:28,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:47:28,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:47:28,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:47:28,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:47:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-20 01:47:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:47:28,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:28,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:28,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-10-20 01:47:28,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:28,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444092958] [2020-10-20 01:47:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:47:28,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444092958] [2020-10-20 01:47:28,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:28,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457967153] [2020-10-20 01:47:28,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:28,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:28,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:28,978 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-20 01:47:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:29,050 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-20 01:47:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:29,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:47:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:29,074 INFO L225 Difference]: With dead ends: 44 [2020-10-20 01:47:29,075 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:47:29,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:47:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 01:47:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:29,176 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-10-20 01:47:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:29,177 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:29,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:47:29,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:29,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:29,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:47:29,181 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-10-20 01:47:29,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:29,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071558698] [2020-10-20 01:47:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:47:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071558698] [2020-10-20 01:47:29,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:29,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:29,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821871425] [2020-10-20 01:47:29,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:29,260 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-10-20 01:47:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:29,307 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-20 01:47:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:29,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 01:47:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:29,310 INFO L225 Difference]: With dead ends: 33 [2020-10-20 01:47:29,310 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 01:47:29,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 01:47:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-20 01:47:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:29,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-10-20 01:47:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:29,332 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:29,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:47:29,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:29,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:29,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:47:29,340 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-10-20 01:47:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:29,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177074458] [2020-10-20 01:47:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:29,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177074458] [2020-10-20 01:47:29,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137622215] [2020-10-20 01:47:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:29,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:29,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-10-20 01:47:29,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792324332] [2020-10-20 01:47:29,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:47:29,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:29,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:47:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:47:29,780 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-10-20 01:47:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:30,005 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-20 01:47:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:47:30,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-20 01:47:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:30,007 INFO L225 Difference]: With dead ends: 55 [2020-10-20 01:47:30,008 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 01:47:30,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:47:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 01:47:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-20 01:47:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 01:47:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-20 01:47:30,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-10-20 01:47:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:30,019 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 01:47:30,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:47:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-20 01:47:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:47:30,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:30,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:30,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:47:30,237 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-10-20 01:47:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:30,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124058386] [2020-10-20 01:47:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:30,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124058386] [2020-10-20 01:47:30,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144244758] [2020-10-20 01:47:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:30,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:30,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-20 01:47:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080910425] [2020-10-20 01:47:30,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:47:30,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:30,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:47:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:47:30,497 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-10-20 01:47:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:30,682 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-10-20 01:47:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:47:30,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-20 01:47:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:30,686 INFO L225 Difference]: With dead ends: 51 [2020-10-20 01:47:30,687 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 01:47:30,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 01:47:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-20 01:47:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 01:47:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-20 01:47:30,700 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-10-20 01:47:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:30,700 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-20 01:47:30,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:47:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-20 01:47:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 01:47:30,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:30,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:30,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:30,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-10-20 01:47:30,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:30,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030327491] [2020-10-20 01:47:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 01:47:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 01:47:31,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030327491] [2020-10-20 01:47:31,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279085745] [2020-10-20 01:47:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 01:47:31,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:31,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-20 01:47:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560205027] [2020-10-20 01:47:31,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:47:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:47:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:31,188 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-10-20 01:47:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:31,464 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-10-20 01:47:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:47:31,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-20 01:47:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:31,467 INFO L225 Difference]: With dead ends: 105 [2020-10-20 01:47:31,467 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 01:47:31,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:47:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 01:47:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-20 01:47:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-20 01:47:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-10-20 01:47:31,494 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-10-20 01:47:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:31,495 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-10-20 01:47:31,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:47:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-10-20 01:47:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 01:47:31,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:31,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:31,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:31,707 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-10-20 01:47:31,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:31,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408241477] [2020-10-20 01:47:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 01:47:31,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408241477] [2020-10-20 01:47:31,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176454701] [2020-10-20 01:47:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 01:47:32,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:32,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-20 01:47:32,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083289284] [2020-10-20 01:47:32,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:47:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:47:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:32,016 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-10-20 01:47:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:32,531 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-10-20 01:47:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:47:32,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-20 01:47:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:32,539 INFO L225 Difference]: With dead ends: 177 [2020-10-20 01:47:32,540 INFO L226 Difference]: Without dead ends: 117 [2020-10-20 01:47:32,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:47:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-20 01:47:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-10-20 01:47:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-20 01:47:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-10-20 01:47:32,575 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-10-20 01:47:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:32,576 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-10-20 01:47:32,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:47:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-10-20 01:47:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 01:47:32,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:32,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:32,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:32,793 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-10-20 01:47:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:32,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295588200] [2020-10-20 01:47:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 01:47:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-20 01:47:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295588200] [2020-10-20 01:47:32,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249678886] [2020-10-20 01:47:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:47:32,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-20 01:47:33,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:33,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-10-20 01:47:33,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75134379] [2020-10-20 01:47:33,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:47:33,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:33,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:47:33,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:47:33,113 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 14 states. [2020-10-20 01:47:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:33,671 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-10-20 01:47:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 01:47:33,671 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-20 01:47:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:33,675 INFO L225 Difference]: With dead ends: 255 [2020-10-20 01:47:33,675 INFO L226 Difference]: Without dead ends: 155 [2020-10-20 01:47:33,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-20 01:47:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-20 01:47:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-10-20 01:47:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-20 01:47:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-10-20 01:47:33,712 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-10-20 01:47:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:33,713 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-10-20 01:47:33,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:47:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-10-20 01:47:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-20 01:47:33,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:33,718 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:33,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 01:47:33,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:33,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1732889556, now seen corresponding path program 1 times [2020-10-20 01:47:33,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:33,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809273967] [2020-10-20 01:47:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-20 01:47:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-20 01:47:34,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809273967] [2020-10-20 01:47:34,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961520951] [2020-10-20 01:47:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:34,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-20 01:47:34,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:34,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-10-20 01:47:34,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876998471] [2020-10-20 01:47:34,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:47:34,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:47:34,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:47:34,346 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 14 states. [2020-10-20 01:47:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:34,823 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-10-20 01:47:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 01:47:34,824 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-10-20 01:47:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:34,827 INFO L225 Difference]: With dead ends: 241 [2020-10-20 01:47:34,827 INFO L226 Difference]: Without dead ends: 120 [2020-10-20 01:47:34,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:47:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-20 01:47:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-10-20 01:47:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-20 01:47:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-10-20 01:47:34,848 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 93 [2020-10-20 01:47:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:34,849 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-10-20 01:47:34,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:47:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-10-20 01:47:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-20 01:47:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:34,852 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:35,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:35,068 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1676450270, now seen corresponding path program 2 times [2020-10-20 01:47:35,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:35,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472634909] [2020-10-20 01:47:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-20 01:47:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-20 01:47:35,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472634909] [2020-10-20 01:47:35,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500665461] [2020-10-20 01:47:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:35,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:47:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:47:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-20 01:47:35,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:35,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2020-10-20 01:47:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327821221] [2020-10-20 01:47:35,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:47:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:47:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:47:35,542 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 14 states. [2020-10-20 01:47:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:35,917 INFO L93 Difference]: Finished difference Result 212 states and 383 transitions. [2020-10-20 01:47:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:47:35,921 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-10-20 01:47:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:35,927 INFO L225 Difference]: With dead ends: 212 [2020-10-20 01:47:35,927 INFO L226 Difference]: Without dead ends: 123 [2020-10-20 01:47:35,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:47:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-20 01:47:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-10-20 01:47:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-20 01:47:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 183 transitions. [2020-10-20 01:47:35,951 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 183 transitions. Word has length 92 [2020-10-20 01:47:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:35,951 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 183 transitions. [2020-10-20 01:47:35,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:47:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 183 transitions. [2020-10-20 01:47:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-20 01:47:35,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:35,954 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:36,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:36,168 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1836149343, now seen corresponding path program 3 times [2020-10-20 01:47:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:36,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164522087] [2020-10-20 01:47:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:47:36,190 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:47:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:47:36,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:47:36,244 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:47:36,244 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:47:36,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 01:47:36,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:47:36 BoogieIcfgContainer [2020-10-20 01:47:36,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:47:36,326 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:47:36,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:47:36,327 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:47:36,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:28" (3/4) ... [2020-10-20 01:47:36,334 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:47:36,481 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:47:36,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:47:36,484 INFO L168 Benchmark]: Toolchain (without parser) took 8707.78 ms. Allocated memory was 41.9 MB in the beginning and 76.0 MB in the end (delta: 34.1 MB). Free memory was 20.3 MB in the beginning and 35.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,484 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 32.0 MB. Free memory was 9.3 MB in the beginning and 9.2 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.89 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.4 MB in the beginning and 21.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,485 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 42.5 MB. Free memory was 21.3 MB in the beginning and 19.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,486 INFO L168 Benchmark]: Boogie Preprocessor took 22.45 ms. Allocated memory is still 42.5 MB. Free memory was 19.7 MB in the beginning and 18.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,486 INFO L168 Benchmark]: RCFGBuilder took 437.47 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 18.5 MB in the beginning and 22.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,486 INFO L168 Benchmark]: TraceAbstraction took 7720.94 ms. Allocated memory was 44.6 MB in the beginning and 76.0 MB in the end (delta: 31.5 MB). Free memory was 22.1 MB in the beginning and 42.1 MB in the end (delta: -20.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,487 INFO L168 Benchmark]: Witness Printer took 155.23 ms. Allocated memory is still 76.0 MB. Free memory was 42.1 MB in the beginning and 35.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:36,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 32.0 MB. Free memory was 9.3 MB in the beginning and 9.2 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 323.89 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.4 MB in the beginning and 21.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.60 ms. Allocated memory is still 42.5 MB. Free memory was 21.3 MB in the beginning and 19.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.45 ms. Allocated memory is still 42.5 MB. Free memory was 19.7 MB in the beginning and 18.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 437.47 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 18.5 MB in the beginning and 22.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 7720.94 ms. Allocated memory was 44.6 MB in the beginning and 76.0 MB in the end (delta: 31.5 MB). Free memory was 22.1 MB in the beginning and 42.1 MB in the end (delta: -20.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. * Witness Printer took 155.23 ms. Allocated memory is still 76.0 MB. Free memory was 42.1 MB in the beginning and 35.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_2calls_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 246 SDtfs, 330 SDslu, 1293 SDs, 0 SdLazy, 1951 SolverSat, 327 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 586 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 839 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 717 ConstructedInterpolants, 0 QuantifiedInterpolants, 75121 SizeOfPredicates, 27 NumberOfNonLiveVariables, 999 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 729/932 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...