./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 ..................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:58:39,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:58:39,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:58:39,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:58:39,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:58:39,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:58:39,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:58:39,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:58:39,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:58:39,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:58:39,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:58:39,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:58:39,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:58:39,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:58:39,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:58:39,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:58:39,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:58:39,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:58:39,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:58:39,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:58:39,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:58:39,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:58:39,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:58:39,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:58:39,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:58:39,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:58:39,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:58:39,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:58:39,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:58:39,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:58:39,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:58:39,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:58:39,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:58:39,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:58:39,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:58:39,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:58:39,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:58:39,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:58:39,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:58:39,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:58:39,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:58:39,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:58:39,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:58:39,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:58:39,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:58:39,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:58:39,867 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:58:39,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:58:39,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:58:39,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:58:39,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:58:39,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:58:39,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:58:39,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:58:39,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:58:39,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:58:39,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:58:39,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:58:39,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:58:39,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:58:39,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:58:39,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:58:39,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:58:39,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:58:39,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:58:39,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:58:39,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:58:39,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:58:39,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:58:39,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:58:39,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:58:39,873 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 -> cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 [2020-10-20 00:58:40,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:58:40,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:58:40,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:58:40,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:58:40,087 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:58:40,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-10-20 00:58:40,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839bd050d/d1f0114c3ec8449bb31d467f13f41461/FLAG2f6573d78 [2020-10-20 00:58:40,604 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:58:40,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-10-20 00:58:40,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839bd050d/d1f0114c3ec8449bb31d467f13f41461/FLAG2f6573d78 [2020-10-20 00:58:41,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839bd050d/d1f0114c3ec8449bb31d467f13f41461 [2020-10-20 00:58:41,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:58:41,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:58:41,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:58:41,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:58:41,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:58:41,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff30fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41, skipping insertion in model container [2020-10-20 00:58:41,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:58:41,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:58:41,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:58:41,311 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:58:41,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:58:41,345 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:58:41,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41 WrapperNode [2020-10-20 00:58:41,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:58:41,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:58:41,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:58:41,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:58:41,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:58:41,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:58:41,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:58:41,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:58:41,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (1/1) ... [2020-10-20 00:58:41,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:58:41,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:58:41,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:58:41,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:58:41,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (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 00:58:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:58:41,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:58:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:58:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:58:41,665 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:58:41,665 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:58:41,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:41 BoogieIcfgContainer [2020-10-20 00:58:41,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:58:41,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:58:41,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:58:41,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:58:41,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:58:41" (1/3) ... [2020-10-20 00:58:41,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1424806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:58:41, skipping insertion in model container [2020-10-20 00:58:41,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:41" (2/3) ... [2020-10-20 00:58:41,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1424806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:58:41, skipping insertion in model container [2020-10-20 00:58:41,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:41" (3/3) ... [2020-10-20 00:58:41,677 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-10-20 00:58:41,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:58:41,697 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:58:41,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:58:41,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:58:41,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:58:41,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:58:41,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:58:41,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:58:41,751 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:58:41,751 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:58:41,751 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:58:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-20 00:58:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:58:41,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:41,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:58:41,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-10-20 00:58:41,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:41,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566318701] [2020-10-20 00:58:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:42,060 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 00:58:42,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566318701] [2020-10-20 00:58:42,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:58:42,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:58:42,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614631207] [2020-10-20 00:58:42,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:58:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:58:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:58:42,089 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-10-20 00:58:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:42,123 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-10-20 00:58:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:58:42,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-10-20 00:58:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:42,137 INFO L225 Difference]: With dead ends: 19 [2020-10-20 00:58:42,137 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:58:42,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:58:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:58:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:58:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:58:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-20 00:58:42,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-20 00:58:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:42,185 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-20 00:58:42,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:58:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-20 00:58:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:58:42,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:42,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:58:42,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:58:42,188 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-10-20 00:58:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:42,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006653701] [2020-10-20 00:58:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:42,342 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 00:58:42,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006653701] [2020-10-20 00:58:42,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205075442] [2020-10-20 00:58:42,344 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 00:58:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:58:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:58:42,451 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 00:58:42,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:58:42,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:58:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347265289] [2020-10-20 00:58:42,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:58:42,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:58:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:58:42,455 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-10-20 00:58:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:42,484 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-20 00:58:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:58:42,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-10-20 00:58:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:42,485 INFO L225 Difference]: With dead ends: 13 [2020-10-20 00:58:42,485 INFO L226 Difference]: Without dead ends: 9 [2020-10-20 00:58:42,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:58:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-20 00:58:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-20 00:58:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 00:58:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-10-20 00:58:42,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-10-20 00:58:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:42,491 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-10-20 00:58:42,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:58:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-10-20 00:58:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:58:42,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:42,492 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-20 00:58:42,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 00:58:42,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-10-20 00:58:42,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:42,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772324343] [2020-10-20 00:58:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772324343] [2020-10-20 00:58:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901550545] [2020-10-20 00:58:42,779 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 00:58:42,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:58:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:58:42,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:58:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:58:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:42,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:58:42,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:58:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323476248] [2020-10-20 00:58:42,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:58:42,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:58:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:58:42,904 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-10-20 00:58:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:42,936 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-10-20 00:58:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:58:42,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-10-20 00:58:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:42,938 INFO L225 Difference]: With dead ends: 14 [2020-10-20 00:58:42,938 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 00:58:42,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:58:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 00:58:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 00:58:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:58:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:58:42,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-10-20 00:58:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:42,943 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:58:42,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:58:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:58:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:58:42,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:42,945 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-10-20 00:58:43,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:58:43,156 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-10-20 00:58:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:43,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534937561] [2020-10-20 00:58:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534937561] [2020-10-20 00:58:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582051469] [2020-10-20 00:58:43,267 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 00:58:43,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 00:58:43,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:58:43,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:58:43,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:58:43,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:58:43,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-20 00:58:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 00:58:43,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 00:58:43,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-20 00:58:43,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574726537] [2020-10-20 00:58:43,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:58:43,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:43,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:58:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:58:43,493 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2020-10-20 00:58:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:43,528 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-10-20 00:58:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:58:43,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-10-20 00:58:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:43,529 INFO L225 Difference]: With dead ends: 10 [2020-10-20 00:58:43,529 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:58:43,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:58:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:58:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:58:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:58:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:58:43,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-10-20 00:58:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:43,532 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:58:43,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:58:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:58:43,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:58:43,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:58:43,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:58:43,764 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:58:43,765 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:58:43,765 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 6) (= ULTIMATE.start_main_~x~0 0)) [2020-10-20 00:58:43,765 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2020-10-20 00:58:43,765 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-20 00:58:43,765 INFO L277 CegarLoopResult]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2020-10-20 00:58:43,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:58:43 BoogieIcfgContainer [2020-10-20 00:58:43,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:58:43,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:58:43,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:58:43,787 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:58:43,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:41" (3/4) ... [2020-10-20 00:58:43,791 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:58:43,800 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:58:43,800 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:58:43,801 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:58:43,801 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:58:43,844 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:58:43,844 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:58:43,847 INFO L168 Benchmark]: Toolchain (without parser) took 2831.18 ms. Allocated memory was 34.6 MB in the beginning and 49.3 MB in the end (delta: 14.7 MB). Free memory was 11.4 MB in the beginning and 31.3 MB in the end (delta: -19.9 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:58:43,848 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.55 ms. Allocated memory was 34.6 MB in the beginning and 41.9 MB in the end (delta: 7.3 MB). Free memory was 10.6 MB in the beginning and 25.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.29 ms. Allocated memory is still 41.9 MB. Free memory was 25.5 MB in the beginning and 24.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,850 INFO L168 Benchmark]: Boogie Preprocessor took 19.45 ms. Allocated memory is still 41.9 MB. Free memory was 24.0 MB in the beginning and 22.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,851 INFO L168 Benchmark]: RCFGBuilder took 262.65 ms. Allocated memory is still 41.9 MB. Free memory was 22.6 MB in the beginning and 21.8 MB in the end (delta: 800.0 kB). Peak memory consumption was 12.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,852 INFO L168 Benchmark]: TraceAbstraction took 2117.94 ms. Allocated memory was 41.9 MB in the beginning and 49.3 MB in the end (delta: 7.3 MB). Free memory was 21.3 MB in the beginning and 33.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,852 INFO L168 Benchmark]: Witness Printer took 57.24 ms. Allocated memory is still 49.3 MB. Free memory was 33.9 MB in the beginning and 31.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:43,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 324.55 ms. Allocated memory was 34.6 MB in the beginning and 41.9 MB in the end (delta: 7.3 MB). Free memory was 10.6 MB in the beginning and 25.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.29 ms. Allocated memory is still 41.9 MB. Free memory was 25.5 MB in the beginning and 24.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.45 ms. Allocated memory is still 41.9 MB. Free memory was 24.0 MB in the beginning and 22.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 262.65 ms. Allocated memory is still 41.9 MB. Free memory was 22.6 MB in the beginning and 21.8 MB in the end (delta: 800.0 kB). Peak memory consumption was 12.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2117.94 ms. Allocated memory was 41.9 MB in the beginning and 49.3 MB in the end (delta: 7.3 MB). Free memory was 21.3 MB in the beginning and 33.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.3 GB. * Witness Printer took 57.24 ms. Allocated memory is still 49.3 MB. Free memory was 33.9 MB in the beginning and 31.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 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: 16]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 6 || x == 0 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 3 SDslu, 28 SDs, 0 SdLazy, 43 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 31 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 54 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 1005 SizeOfPredicates, 5 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 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...