./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c11.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/loops/n.c11.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 ba63c30fcd23f432b857b2315ba9dece8a321b75 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:54:55,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:54:55,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:54:55,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:54:55,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:54:55,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:54:55,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:54:55,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:54:55,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:54:55,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:54:55,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:54:55,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:54:55,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:54:55,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:54:55,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:54:55,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:54:55,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:54:55,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:54:55,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:54:55,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:54:55,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:54:55,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:54:55,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:54:55,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:54:55,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:54:55,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:54:55,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:54:55,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:54:55,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:54:55,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:54:55,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:54:55,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:54:55,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:54:55,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:54:55,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:54:55,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:54:55,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:54:55,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:54:55,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:54:55,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:54:55,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:54:55,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:54:55,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:54:55,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:54:55,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:54:55,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:54:55,911 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:54:55,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:54:55,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:54:55,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:54:55,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:54:55,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:54:55,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:54:55,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:54:55,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:54:55,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:54:55,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:54:55,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:54:55,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:54:55,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:54:55,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:54:55,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:54:55,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:54:55,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:54:55,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:54:55,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:54:55,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:54:55,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:54:55,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:54:55,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:54:55,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:54:55,921 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 -> ba63c30fcd23f432b857b2315ba9dece8a321b75 [2020-10-20 00:54:56,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:54:56,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:54:56,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:54:56,170 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:54:56,171 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:54:56,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c11.c [2020-10-20 00:54:56,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420386278/cd2e7db5ba8445ff99d0edde9aad7466/FLAG6c01f6da6 [2020-10-20 00:54:56,820 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:54:56,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c11.c [2020-10-20 00:54:56,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420386278/cd2e7db5ba8445ff99d0edde9aad7466/FLAG6c01f6da6 [2020-10-20 00:54:57,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/420386278/cd2e7db5ba8445ff99d0edde9aad7466 [2020-10-20 00:54:57,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:54:57,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:54:57,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:54:57,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:54:57,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:54:57,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3957bebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57, skipping insertion in model container [2020-10-20 00:54:57,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:54:57,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:54:57,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:54:57,483 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:54:57,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:54:57,521 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:54:57,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57 WrapperNode [2020-10-20 00:54:57,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:54:57,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:54:57,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:54:57,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:54:57,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:54:57,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:54:57,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:54:57,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:54:57,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:54:57,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:54:57,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:54:57,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:54:57,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (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 00:54:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:54:57,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:54:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:54:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:54:57,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:54:57,873 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:54:57,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57 BoogieIcfgContainer [2020-10-20 00:54:57,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:54:57,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:54:57,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:54:57,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:54:57,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:54:57" (1/3) ... [2020-10-20 00:54:57,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2254530c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:54:57, skipping insertion in model container [2020-10-20 00:54:57,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (2/3) ... [2020-10-20 00:54:57,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2254530c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:54:57, skipping insertion in model container [2020-10-20 00:54:57,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57" (3/3) ... [2020-10-20 00:54:57,884 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-10-20 00:54:57,896 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:54:57,904 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:54:57,915 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:54:57,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:54:57,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:54:57,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:54:57,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:54:57,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:54:57,945 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:54:57,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:54:57,946 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:54:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-20 00:54:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:54:57,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:57,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:54:57,966 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-10-20 00:54:57,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:57,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665418873] [2020-10-20 00:54:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:58,115 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 00:54:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665418873] [2020-10-20 00:54:58,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:54:58,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:54:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977124609] [2020-10-20 00:54:58,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:54:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:54:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:54:58,143 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-10-20 00:54:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:58,162 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-20 00:54:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:54:58,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:54:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:58,172 INFO L225 Difference]: With dead ends: 22 [2020-10-20 00:54:58,173 INFO L226 Difference]: Without dead ends: 9 [2020-10-20 00:54:58,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:54:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-20 00:54:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-20 00:54:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 00:54:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-10-20 00:54:58,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-10-20 00:54:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:58,210 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-20 00:54:58,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:54:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-10-20 00:54:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:54:58,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:58,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:54:58,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:54:58,212 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-10-20 00:54:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:58,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730678469] [2020-10-20 00:54:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:58,316 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 00:54:58,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730678469] [2020-10-20 00:54:58,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:54:58,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:54:58,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363927240] [2020-10-20 00:54:58,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:54:58,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:54:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:54:58,320 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2020-10-20 00:54:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:58,373 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-20 00:54:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:54:58,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 00:54:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:58,374 INFO L225 Difference]: With dead ends: 21 [2020-10-20 00:54:58,375 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:54:58,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:54:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:54:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-20 00:54:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 00:54:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-20 00:54:58,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2020-10-20 00:54:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:58,381 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-20 00:54:58,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:54:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-20 00:54:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:54:58,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:58,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:58,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:54:58,383 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2020-10-20 00:54:58,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:58,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476181522] [2020-10-20 00:54:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476181522] [2020-10-20 00:54:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915489592] [2020-10-20 00:54:58,508 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 00:54:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:54:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:54:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:58,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:54:58,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-20 00:54:58,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134853378] [2020-10-20 00:54:58,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:54:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:54:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:54:58,660 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-10-20 00:54:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:58,713 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-20 00:54:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:54:58,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-10-20 00:54:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:58,715 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:54:58,715 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:54:58,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:54:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:54:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:54:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:54:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:54:58,720 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-10-20 00:54:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:58,720 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:54:58,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:54:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:54:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:54:58,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:58,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:58,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:54:58,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:58,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2020-10-20 00:54:58,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:58,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795824931] [2020-10-20 00:54:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:59,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795824931] [2020-10-20 00:54:59,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752296173] [2020-10-20 00:54:59,104 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 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 00:54:59,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:54:59,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:54:59,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:54:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:54:59,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:54:59,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:54:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:59,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:54:59,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-10-20 00:54:59,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604283011] [2020-10-20 00:54:59,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:54:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:54:59,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:54:59,255 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-10-20 00:54:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:59,351 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-20 00:54:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:54:59,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-20 00:54:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:59,353 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:54:59,353 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 00:54:59,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:54:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 00:54:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-20 00:54:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 00:54:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-20 00:54:59,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-20 00:54:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:59,360 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-20 00:54:59,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:54:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-20 00:54:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:54:59,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:59,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:59,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:54:59,573 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2020-10-20 00:54:59,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:59,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497597549] [2020-10-20 00:54:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:59,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497597549] [2020-10-20 00:54:59,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439550165] [2020-10-20 00:54:59,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:54:59,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 00:54:59,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:54:59,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:54:59,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:54:59,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:54:59,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:54:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:59,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:54:59,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-20 00:54:59,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512656025] [2020-10-20 00:54:59,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:54:59,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:54:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:54:59,919 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-10-20 00:54:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:59,993 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-20 00:54:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:54:59,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-20 00:54:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:59,995 INFO L225 Difference]: With dead ends: 36 [2020-10-20 00:54:59,995 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:54:59,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:54:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:54:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-20 00:54:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 00:55:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-20 00:55:00,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-20 00:55:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:00,001 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-20 00:55:00,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:55:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-20 00:55:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:55:00,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:00,003 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:00,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:00,216 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:00,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2020-10-20 00:55:00,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:00,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301497528] [2020-10-20 00:55:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:00,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301497528] [2020-10-20 00:55:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029778522] [2020-10-20 00:55:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:00,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:55:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 00:55:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:00,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:00,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:00,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:00,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-20 00:55:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306865406] [2020-10-20 00:55:00,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:55:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:55:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:55:00,448 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-10-20 00:55:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:00,531 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-20 00:55:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:00,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-20 00:55:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:00,532 INFO L225 Difference]: With dead ends: 34 [2020-10-20 00:55:00,532 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:55:00,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:55:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:55:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:55:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:55:00,534 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-10-20 00:55:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:00,534 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:55:00,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:55:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:55:00,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:55:00,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:00,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:55:00,789 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:55:00,789 INFO L277 CegarLoopResult]: At program point L31(lines 14 34) the Hoare annotation is: true [2020-10-20 00:55:00,789 INFO L274 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-10-20 00:55:00,789 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2020-10-20 00:55:00,789 INFO L270 CegarLoopResult]: At program point L21-2(lines 21 29) the Hoare annotation is: (or (= ULTIMATE.start_main_~len~0 0) (and (<= ULTIMATE.start_main_~len~0 4) (<= 4 ULTIMATE.start_main_~len~0)) (and (<= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 2)) (= ULTIMATE.start_main_~len~0 1) (and (<= ULTIMATE.start_main_~len~0 3) (<= 3 ULTIMATE.start_main_~len~0))) [2020-10-20 00:55:00,790 INFO L274 CegarLoopResult]: For program point L21-3(lines 21 29) no Hoare annotation was computed. [2020-10-20 00:55:00,790 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 00:55:00,790 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:55:00,790 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:55:00,790 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:55:00,791 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:55:00,791 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:55:00,791 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-20 00:55:00,791 INFO L277 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-10-20 00:55:00,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:00 BoogieIcfgContainer [2020-10-20 00:55:00,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:00,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:00,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:00,809 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:00,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57" (3/4) ... [2020-10-20 00:55:00,813 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:55:00,824 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:55:00,824 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:55:00,825 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:00,825 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:55:00,870 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:00,870 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:00,873 INFO L168 Benchmark]: Toolchain (without parser) took 3628.38 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 24.8 MB in the beginning and 21.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,874 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.7 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.65 ms. Allocated memory is still 44.0 MB. Free memory was 24.0 MB in the beginning and 13.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,875 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.61 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 13.5 MB in the beginning and 26.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,876 INFO L168 Benchmark]: Boogie Preprocessor took 23.33 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,877 INFO L168 Benchmark]: RCFGBuilder took 283.03 ms. Allocated memory is still 44.6 MB. Free memory was 25.3 MB in the beginning and 13.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,878 INFO L168 Benchmark]: TraceAbstraction took 2932.01 ms. Allocated memory was 44.6 MB in the beginning and 54.5 MB in the end (delta: 10.0 MB). Free memory was 13.1 MB in the beginning and 24.6 MB in the end (delta: -11.5 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:55:00,878 INFO L168 Benchmark]: Witness Printer took 62.23 ms. Allocated memory is still 54.5 MB. Free memory was 24.6 MB in the beginning and 21.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:00,883 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.7 MB in the end (delta: 73.7 kB). Peak memory consumption was 73.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 272.65 ms. Allocated memory is still 44.0 MB. Free memory was 24.0 MB in the beginning and 13.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.61 ms. Allocated memory was 44.0 MB in the beginning and 44.6 MB in the end (delta: 524.3 kB). Free memory was 13.5 MB in the beginning and 26.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.33 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 283.03 ms. Allocated memory is still 44.6 MB. Free memory was 25.3 MB in the beginning and 13.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2932.01 ms. Allocated memory was 44.6 MB in the beginning and 54.5 MB in the end (delta: 10.0 MB). Free memory was 13.1 MB in the beginning and 24.6 MB in the end (delta: -11.5 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 62.23 ms. Allocated memory is still 54.5 MB. Free memory was 24.6 MB in the beginning and 21.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((len == 0 || (len <= 4 && 4 <= len)) || (2 <= len && len <= 2)) || len == 1) || (len <= 3 && 3 <= len) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 43 SDslu, 141 SDs, 0 SdLazy, 195 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 30 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 7051 SizeOfPredicates, 12 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 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...