./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.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_4-1.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 0208408d43bfed3fb8998dae24b66601d82afc9c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:47:23,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:47:23,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:47:23,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:47:23,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:47:23,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:47:23,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:47:23,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:47:23,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:47:23,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:47:23,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:47:23,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:47:23,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:47:23,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:47:23,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:47:23,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:47:23,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:47:23,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:47:23,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:47:23,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:47:23,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:47:23,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:47:23,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:47:23,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:47:23,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:47:23,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:47:23,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:47:23,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:47:23,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:47:23,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:47:23,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:47:23,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:47:23,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:47:23,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:47:23,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:47:23,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:47:23,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:47:23,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:47:23,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:47:23,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:47:23,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:47:23,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:47:23,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:47:23,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:47:23,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:47:23,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:47:23,604 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:47:23,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:47:23,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:47:23,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:47:23,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:47:23,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:47:23,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:47:23,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:47:23,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:47:23,608 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:47:23,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:47:23,608 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:47:23,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:47:23,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:47:23,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:47:23,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:47:23,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:47:23,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:23,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:47:23,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:47:23,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:47:23,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:47:23,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:47:23,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:47:23,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:47:23,612 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 -> 0208408d43bfed3fb8998dae24b66601d82afc9c [2020-10-20 01:47:23,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:47:23,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:47:23,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:47:23,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:47:23,905 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:47:23,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-10-20 01:47:23,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58837cdc/969526942c284e9c84a8955ea47731ec/FLAG289e4c753 [2020-10-20 01:47:24,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:47:24,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-10-20 01:47:24,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58837cdc/969526942c284e9c84a8955ea47731ec/FLAG289e4c753 [2020-10-20 01:47:24,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58837cdc/969526942c284e9c84a8955ea47731ec [2020-10-20 01:47:24,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:47:24,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:47:24,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:24,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:47:24,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:47:24,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:24" (1/1) ... [2020-10-20 01:47:24,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710eb27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:24, skipping insertion in model container [2020-10-20 01:47:24,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:24" (1/1) ... [2020-10-20 01:47:24,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:47:24,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:47:25,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:25,137 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:47:25,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:25,183 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:47:25,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25 WrapperNode [2020-10-20 01:47:25,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:25,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:25,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:47:25,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:47:25,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:25,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:47:25,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:47:25,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:47:25,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (1/1) ... [2020-10-20 01:47:25,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:47:25,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:47:25,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:47:25,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:47:25,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (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 01:47:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:47:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 01:47:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 01:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 01:47:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 01:47:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:47:25,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:47:25,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:47:25,591 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:47:25,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:25 BoogieIcfgContainer [2020-10-20 01:47:25,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:47:25,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:47:25,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:47:25,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:47:25,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:47:24" (1/3) ... [2020-10-20 01:47:25,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:25, skipping insertion in model container [2020-10-20 01:47:25,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:25" (2/3) ... [2020-10-20 01:47:25,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:25, skipping insertion in model container [2020-10-20 01:47:25,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:25" (3/3) ... [2020-10-20 01:47:25,601 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-10-20 01:47:25,613 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:47:25,628 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:47:25,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:47:25,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:47:25,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:47:25,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:47:25,740 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:47:25,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:47:25,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:47:25,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:47:25,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:47:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-20 01:47:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:47:25,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:25,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:25,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-10-20 01:47:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601407939] [2020-10-20 01:47:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:25,986 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 01:47:25,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601407939] [2020-10-20 01:47:25,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:25,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555059514] [2020-10-20 01:47:25,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:26,013 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-20 01:47:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:26,117 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-20 01:47:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:26,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:47:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:26,131 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:47:26,131 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:47:26,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:47:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:47:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 01:47:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:26,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-10-20 01:47:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:26,189 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:26,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:47:26,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:26,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:26,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:47:26,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-10-20 01:47:26,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:26,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616578158] [2020-10-20 01:47:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,287 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 01:47:26,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616578158] [2020-10-20 01:47:26,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:26,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525075108] [2020-10-20 01:47:26,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:26,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:26,291 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-10-20 01:47:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:26,352 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-20 01:47:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:26,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 01:47:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:26,355 INFO L225 Difference]: With dead ends: 33 [2020-10-20 01:47:26,355 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 01:47:26,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:47:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 01:47:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-20 01:47:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:26,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-10-20 01:47:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:26,365 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:26,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:47:26,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:26,367 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 01:47:26,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:47:26,367 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-10-20 01:47:26,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:26,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874396549] [2020-10-20 01:47:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,501 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 01:47:26,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874396549] [2020-10-20 01:47:26,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504843407] [2020-10-20 01:47:26,502 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 01:47:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:26,681 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 01:47:26,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:26,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-10-20 01:47:26,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653454157] [2020-10-20 01:47:26,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:47:26,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:47:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:47:26,684 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-10-20 01:47:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:26,895 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-20 01:47:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:47:26,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-20 01:47:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:26,898 INFO L225 Difference]: With dead ends: 55 [2020-10-20 01:47:26,898 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 01:47:26,900 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 01:47:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 01:47:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-20 01:47:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 01:47:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-20 01:47:26,908 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-10-20 01:47:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:26,909 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 01:47:26,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:47:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-20 01:47:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:47:26,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:26,911 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 01:47:27,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:47:27,127 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-10-20 01:47:27,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:27,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242390485] [2020-10-20 01:47:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,306 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 01:47:27,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242390485] [2020-10-20 01:47:27,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731916822] [2020-10-20 01:47:27,307 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 01:47:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:27,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:27,443 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 01:47:27,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:27,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-20 01:47:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795054207] [2020-10-20 01:47:27,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:47:27,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:47:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:47:27,446 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-10-20 01:47:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:27,635 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-10-20 01:47:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:47:27,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-20 01:47:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:27,639 INFO L225 Difference]: With dead ends: 51 [2020-10-20 01:47:27,639 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 01:47:27,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 01:47:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-20 01:47:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 01:47:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-20 01:47:27,653 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-10-20 01:47:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:27,653 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-20 01:47:27,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:47:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-20 01:47:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 01:47:27,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:27,656 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 01:47:27,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:27,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-10-20 01:47:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:27,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765945925] [2020-10-20 01:47:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:27,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 01:47:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,022 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 01:47:28,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765945925] [2020-10-20 01:47:28,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276448110] [2020-10-20 01:47:28,023 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 01:47:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:28,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:28,157 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 01:47:28,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:28,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-20 01:47:28,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23889855] [2020-10-20 01:47:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:47:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:47:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:28,159 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-10-20 01:47:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:28,429 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-10-20 01:47:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:47:28,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-20 01:47:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:28,431 INFO L225 Difference]: With dead ends: 105 [2020-10-20 01:47:28,431 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 01:47:28,433 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 01:47:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 01:47:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-20 01:47:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-20 01:47:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-10-20 01:47:28,446 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-10-20 01:47:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:28,446 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-10-20 01:47:28,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:47:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-10-20 01:47:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 01:47:28,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:28,449 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 01:47:28,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:28,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-10-20 01:47:28,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:28,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062144851] [2020-10-20 01:47:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,781 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 01:47:28,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062144851] [2020-10-20 01:47:28,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914825493] [2020-10-20 01:47:28,781 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 01:47:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:28,919 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 01:47:28,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:28,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-20 01:47:28,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365769138] [2020-10-20 01:47:28,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:47:28,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:47:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:28,921 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-10-20 01:47:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:29,373 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-10-20 01:47:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:47:29,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-20 01:47:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:29,377 INFO L225 Difference]: With dead ends: 177 [2020-10-20 01:47:29,377 INFO L226 Difference]: Without dead ends: 117 [2020-10-20 01:47:29,380 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 01:47:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-20 01:47:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-10-20 01:47:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-20 01:47:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-10-20 01:47:29,403 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-10-20 01:47:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:29,404 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-10-20 01:47:29,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:47:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-10-20 01:47:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 01:47:29,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:29,409 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 01:47:29,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:29,624 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-10-20 01:47:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:29,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875361462] [2020-10-20 01:47:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 01:47:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,778 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 01:47:29,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875361462] [2020-10-20 01:47:29,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126466689] [2020-10-20 01:47:29,779 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 01:47:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 01:47:29,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:29,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-20 01:47:29,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078549288] [2020-10-20 01:47:29,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:47:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:47:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:47:29,905 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 12 states. [2020-10-20 01:47:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:30,270 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2020-10-20 01:47:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 01:47:30,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-20 01:47:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:30,273 INFO L225 Difference]: With dead ends: 262 [2020-10-20 01:47:30,274 INFO L226 Difference]: Without dead ends: 162 [2020-10-20 01:47:30,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:47:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-20 01:47:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2020-10-20 01:47:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-20 01:47:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-10-20 01:47:30,302 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2020-10-20 01:47:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:30,303 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-10-20 01:47:30,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:47:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-10-20 01:47:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-20 01:47:30,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:30,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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 01:47:30,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 01:47:30,513 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1235830355, now seen corresponding path program 1 times [2020-10-20 01:47:30,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:30,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777941112] [2020-10-20 01:47:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-20 01:47:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777941112] [2020-10-20 01:47:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136120729] [2020-10-20 01:47:30,745 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 01:47:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-20 01:47:30,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-10-20 01:47:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036861381] [2020-10-20 01:47:30,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:47:30,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:30,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:47:30,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:30,895 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 13 states. [2020-10-20 01:47:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:31,307 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2020-10-20 01:47:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:47:31,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-20 01:47:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:31,310 INFO L225 Difference]: With dead ends: 301 [2020-10-20 01:47:31,310 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 01:47:31,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-20 01:47:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 01:47:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2020-10-20 01:47:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-20 01:47:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-10-20 01:47:31,327 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2020-10-20 01:47:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:31,328 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-10-20 01:47:31,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:47:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-10-20 01:47:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-20 01:47:31,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:31,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:31,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:31,545 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1494883154, now seen corresponding path program 1 times [2020-10-20 01:47:31,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:31,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956775494] [2020-10-20 01:47:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-20 01:47:31,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956775494] [2020-10-20 01:47:31,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303992778] [2020-10-20 01:47:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:47:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:31,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-20 01:47:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-20 01:47:32,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:32,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-10-20 01:47:32,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605674216] [2020-10-20 01:47:32,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 01:47:32,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:32,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 01:47:32,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:47:32,247 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand 21 states. [2020-10-20 01:47:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:32,466 INFO L93 Difference]: Finished difference Result 127 states and 217 transitions. [2020-10-20 01:47:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 01:47:32,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-20 01:47:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:32,470 INFO L225 Difference]: With dead ends: 127 [2020-10-20 01:47:32,470 INFO L226 Difference]: Without dead ends: 123 [2020-10-20 01:47:32,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:47:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-20 01:47:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-10-20 01:47:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-20 01:47:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 148 transitions. [2020-10-20 01:47:32,485 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 148 transitions. Word has length 65 [2020-10-20 01:47:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:32,486 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 148 transitions. [2020-10-20 01:47:32,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 01:47:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 148 transitions. [2020-10-20 01:47:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-20 01:47:32,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:32,488 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:32,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:32,703 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash 166974902, now seen corresponding path program 2 times [2020-10-20 01:47:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:32,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403541161] [2020-10-20 01:47:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 01:47:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-20 01:47:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-20 01:47:32,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403541161] [2020-10-20 01:47:32,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282107847] [2020-10-20 01:47:32,894 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:32,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:47:32,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:47:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:47:32,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-20 01:47:33,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:33,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-10-20 01:47:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820053307] [2020-10-20 01:47:33,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 01:47:33,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 01:47:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:47:33,038 INFO L87 Difference]: Start difference. First operand 90 states and 148 transitions. Second operand 16 states. [2020-10-20 01:47:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:33,556 INFO L93 Difference]: Finished difference Result 191 states and 348 transitions. [2020-10-20 01:47:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 01:47:33,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-20 01:47:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:33,560 INFO L225 Difference]: With dead ends: 191 [2020-10-20 01:47:33,561 INFO L226 Difference]: Without dead ends: 96 [2020-10-20 01:47:33,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-10-20 01:47:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-20 01:47:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2020-10-20 01:47:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-20 01:47:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-10-20 01:47:33,585 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 66 [2020-10-20 01:47:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:33,585 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-10-20 01:47:33,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 01:47:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-10-20 01:47:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-20 01:47:33,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:33,590 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:33,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 01:47:33,805 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash -129129630, now seen corresponding path program 1 times [2020-10-20 01:47:33,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:33,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869901602] [2020-10-20 01:47:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-20 01:47:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-20 01:47:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-20 01:47:33,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869901602] [2020-10-20 01:47:33,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137917209] [2020-10-20 01:47:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:47:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-20 01:47:34,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:34,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2020-10-20 01:47:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052111164] [2020-10-20 01:47:34,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:47:34,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:47:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:47:34,170 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 12 states. [2020-10-20 01:47:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:34,398 INFO L93 Difference]: Finished difference Result 159 states and 234 transitions. [2020-10-20 01:47:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:47:34,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-20 01:47:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:34,400 INFO L225 Difference]: With dead ends: 159 [2020-10-20 01:47:34,400 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:47:34,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:47:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:47:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:47:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:47:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:47:34,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-10-20 01:47:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:34,407 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:47:34,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:47:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:47:34,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:47:34,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:34,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:47:35,301 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2020-10-20 01:47:35,330 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:47:35,330 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:47:35,330 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:47:35,330 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:47:35,330 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-20 01:47:35,330 INFO L270 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2020-10-20 01:47:35,331 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-10-20 01:47:35,331 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-20 01:47:35,331 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 4 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 4)) [2020-10-20 01:47:35,331 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-20 01:47:35,331 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-10-20 01:47:35,331 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-20 01:47:35,332 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-10-20 01:47:35,332 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= 2 |fibo2_#in~n|)) [2020-10-20 01:47:35,332 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-20 01:47:35,333 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#t~ret9| 1) (< 1 fibo2_~n) (<= 1 |fibo2_#t~ret9|) (<= |fibo2_#in~n| 2)) (not (<= |fibo2_#in~n| 3)))) [2020-10-20 01:47:35,333 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-10-20 01:47:35,333 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-10-20 01:47:35,333 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-10-20 01:47:35,333 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-10-20 01:47:35,333 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-10-20 01:47:35,334 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-10-20 01:47:35,335 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-10-20 01:47:35,335 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-20 01:47:35,335 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0 (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|)) (and (<= |fibo1_#in~n| 3) (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2))) [2020-10-20 01:47:35,335 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-10-20 01:47:35,335 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-10-20 01:47:35,335 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-10-20 01:47:35,336 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-10-20 01:47:35,336 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-10-20 01:47:35,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:47:35 BoogieIcfgContainer [2020-10-20 01:47:35,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:47:35,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:47:35,354 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:47:35,355 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:47:35,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:25" (3/4) ... [2020-10-20 01:47:35,358 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:47:35,366 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-10-20 01:47:35,366 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-10-20 01:47:35,372 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 01:47:35,372 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:47:35,372 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:47:35,372 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:47:35,425 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:47:35,426 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:47:35,430 INFO L168 Benchmark]: Toolchain (without parser) took 10641.94 ms. Allocated memory was 36.2 MB in the beginning and 84.9 MB in the end (delta: 48.8 MB). Free memory was 9.9 MB in the beginning and 44.8 MB in the end (delta: -34.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,436 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 35.7 MB. Free memory was 14.6 MB in the beginning and 14.6 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.47 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 9.1 MB in the beginning and 28.1 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 45.1 MB. Free memory was 28.1 MB in the beginning and 26.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,439 INFO L168 Benchmark]: Boogie Preprocessor took 48.00 ms. Allocated memory is still 45.1 MB. Free memory was 26.5 MB in the beginning and 25.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,439 INFO L168 Benchmark]: RCFGBuilder took 311.40 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 25.3 MB in the beginning and 24.5 MB in the end (delta: 874.4 kB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,440 INFO L168 Benchmark]: TraceAbstraction took 9760.22 ms. Allocated memory was 47.2 MB in the beginning and 84.9 MB in the end (delta: 37.7 MB). Free memory was 24.0 MB in the beginning and 48.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 50.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,441 INFO L168 Benchmark]: Witness Printer took 73.60 ms. Allocated memory is still 84.9 MB. Free memory was 48.3 MB in the beginning and 44.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:35,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 35.7 MB. Free memory was 14.6 MB in the beginning and 14.6 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 391.47 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 9.1 MB in the beginning and 28.1 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 45.1 MB. Free memory was 28.1 MB in the beginning and 26.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 48.00 ms. Allocated memory is still 45.1 MB. Free memory was 26.5 MB in the beginning and 25.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 311.40 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 25.3 MB in the beginning and 24.5 MB in the end (delta: 874.4 kB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 9760.22 ms. Allocated memory was 47.2 MB in the beginning and 84.9 MB in the end (delta: 37.7 MB). Free memory was 24.0 MB in the beginning and 48.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 50.1 MB. Max. memory is 14.3 GB. * Witness Printer took 73.60 ms. Allocated memory is still 84.9 MB. Free memory was 48.3 MB in the beginning and 44.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.8s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 304 SDtfs, 365 SDslu, 1997 SDs, 0 SdLazy, 2276 SolverSat, 306 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 705 GetRequests, 535 SyntacticMatches, 6 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 103 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 407 PreInvPairs, 497 NumberOfFragments, 88 HoareAnnotationTreeSize, 407 FomulaSimplifications, 1191 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1075 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 841 ConstructedInterpolants, 0 QuantifiedInterpolants, 95833 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1191 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 549/762 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 correct! Received shutdown request...