./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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-invgen/nested9.i -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 b0874b2316aff3266709463f0d72702527bf3a82 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:22:23,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:22:23,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:22:23,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:22:23,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:22:23,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:22:23,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:22:23,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:22:23,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:22:23,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:22:23,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:22:23,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:22:23,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:22:23,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:22:23,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:22:23,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:22:23,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:22:23,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:22:23,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:22:23,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:22:23,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:22:23,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:22:23,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:22:23,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:22:23,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:22:23,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:22:23,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:22:23,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:22:23,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:22:23,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:22:23,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:22:23,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:22:23,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:22:23,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:22:23,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:22:23,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:22:23,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:22:23,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:22:23,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:22:23,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:22:23,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:22:23,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:22:23,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:22:23,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:22:23,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:22:23,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:22:23,893 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:22:23,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:22:23,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:22:23,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:22:23,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:22:23,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:22:23,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:22:23,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:22:23,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:22:23,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:22:23,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:22:23,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:22:23,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:22:23,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:22:23,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:22:23,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:22:23,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:22:23,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:22:23,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:22:23,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:22:23,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:22:23,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:22:23,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:22:23,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:22:23,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:22:23,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0874b2316aff3266709463f0d72702527bf3a82 [2020-10-25 22:22:24,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:22:24,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:22:24,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:22:24,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:22:24,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:22:24,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested9.i [2020-10-25 22:22:24,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9400e470/4784c7a876db4b61ad25e64ebeba94f5/FLAGb0902d04c [2020-10-25 22:22:25,151 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:22:25,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i [2020-10-25 22:22:25,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9400e470/4784c7a876db4b61ad25e64ebeba94f5/FLAGb0902d04c [2020-10-25 22:22:25,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9400e470/4784c7a876db4b61ad25e64ebeba94f5 [2020-10-25 22:22:25,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:22:25,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:22:25,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:22:25,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:22:25,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:22:25,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:25,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7439f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25, skipping insertion in model container [2020-10-25 22:22:25,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:25,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:22:25,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:22:25,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:22:25,944 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:22:25,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:22:25,994 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:22:25,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25 WrapperNode [2020-10-25 22:22:25,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:22:25,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:22:25,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:22:25,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:22:26,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:22:26,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:22:26,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:22:26,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:22:26,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... [2020-10-25 22:22:26,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:22:26,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:22:26,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:22:26,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:22:26,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:22:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:22:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:22:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:22:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:22:26,611 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:22:26,612 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-25 22:22:26,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:26 BoogieIcfgContainer [2020-10-25 22:22:26,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:22:26,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:22:26,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:22:26,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:22:26,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:22:25" (1/3) ... [2020-10-25 22:22:26,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba42e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:22:26, skipping insertion in model container [2020-10-25 22:22:26,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:25" (2/3) ... [2020-10-25 22:22:26,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba42e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:22:26, skipping insertion in model container [2020-10-25 22:22:26,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:26" (3/3) ... [2020-10-25 22:22:26,632 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-25 22:22:26,648 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:22:26,654 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:22:26,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:22:26,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:22:26,720 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:22:26,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:22:26,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:22:26,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:22:26,721 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:22:26,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:22:26,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:22:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-25 22:22:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:22:26,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:26,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:26,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash -695179202, now seen corresponding path program 1 times [2020-10-25 22:22:26,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:26,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151718900] [2020-10-25 22:22:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:27,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151718900] [2020-10-25 22:22:27,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:22:27,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 22:22:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098049314] [2020-10-25 22:22:27,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:22:27,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:27,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:22:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:22:27,184 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-25 22:22:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:27,380 INFO L93 Difference]: Finished difference Result 74 states and 115 transitions. [2020-10-25 22:22:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:22:27,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-25 22:22:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:27,394 INFO L225 Difference]: With dead ends: 74 [2020-10-25 22:22:27,394 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:22:27,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:22:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:22:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2020-10-25 22:22:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:22:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-25 22:22:27,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-25 22:22:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:27,451 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-25 22:22:27,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:22:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-25 22:22:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:22:27,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:27,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:27,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:22:27,454 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1058384818, now seen corresponding path program 1 times [2020-10-25 22:22:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:27,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492144648] [2020-10-25 22:22:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:27,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492144648] [2020-10-25 22:22:27,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503169078] [2020-10-25 22:22:27,549 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 [2020-10-25 22:22:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:22:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:27,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:27,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:27,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:27,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:28,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:22:28,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2020-10-25 22:22:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531110619] [2020-10-25 22:22:28,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:22:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:22:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:22:28,110 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-10-25 22:22:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:28,263 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-25 22:22:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:22:28,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-25 22:22:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:28,265 INFO L225 Difference]: With dead ends: 50 [2020-10-25 22:22:28,265 INFO L226 Difference]: Without dead ends: 46 [2020-10-25 22:22:28,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-25 22:22:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-25 22:22:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2020-10-25 22:22:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-25 22:22:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-25 22:22:28,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-25 22:22:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:28,274 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-25 22:22:28,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:22:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-25 22:22:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:22:28,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:28,276 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:28,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 22:22:28,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash -678642988, now seen corresponding path program 1 times [2020-10-25 22:22:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:28,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423989616] [2020-10-25 22:22:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:28,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423989616] [2020-10-25 22:22:28,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038295308] [2020-10-25 22:22:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:22:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:22:28,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:22:28,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-10-25 22:22:28,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536225022] [2020-10-25 22:22:28,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:22:28,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:22:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:22:28,655 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-10-25 22:22:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:28,675 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-25 22:22:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:22:28,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-25 22:22:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:28,676 INFO L225 Difference]: With dead ends: 36 [2020-10-25 22:22:28,676 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 22:22:28,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:22:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 22:22:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-25 22:22:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 22:22:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-25 22:22:28,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-25 22:22:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:28,683 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-25 22:22:28,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:22:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-25 22:22:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:22:28,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:28,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:28,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:28,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 59855584, now seen corresponding path program 1 times [2020-10-25 22:22:28,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:28,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066889365] [2020-10-25 22:22:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:28,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066889365] [2020-10-25 22:22:28,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767058682] [2020-10-25 22:22:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:29,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:22:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:29,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:22:29,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-25 22:22:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18461719] [2020-10-25 22:22:29,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 22:22:29,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 22:22:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:22:29,181 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 11 states. [2020-10-25 22:22:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:29,421 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-25 22:22:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:22:29,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-25 22:22:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:29,424 INFO L225 Difference]: With dead ends: 50 [2020-10-25 22:22:29,424 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 22:22:29,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-25 22:22:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 22:22:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-10-25 22:22:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:22:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-25 22:22:29,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-10-25 22:22:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-25 22:22:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 22:22:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-25 22:22:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 22:22:29,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:29,436 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:29,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:29,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash 895141480, now seen corresponding path program 1 times [2020-10-25 22:22:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:29,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612437897] [2020-10-25 22:22:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 22:22:29,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612437897] [2020-10-25 22:22:29,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195238679] [2020-10-25 22:22:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:22:29,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 22:22:29,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:22:29,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-10-25 22:22:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872320637] [2020-10-25 22:22:29,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:22:29,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:22:29,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:22:29,959 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-10-25 22:22:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:30,037 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-25 22:22:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:22:30,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-25 22:22:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:30,038 INFO L225 Difference]: With dead ends: 52 [2020-10-25 22:22:30,038 INFO L226 Difference]: Without dead ends: 33 [2020-10-25 22:22:30,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:22:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-25 22:22:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-25 22:22:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-25 22:22:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-25 22:22:30,048 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-10-25 22:22:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:30,049 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-25 22:22:30,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:22:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-25 22:22:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 22:22:30,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:30,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:30,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:30,264 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash 423449338, now seen corresponding path program 2 times [2020-10-25 22:22:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:30,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552678965] [2020-10-25 22:22:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 22:22:30,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552678965] [2020-10-25 22:22:30,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947081695] [2020-10-25 22:22:30,408 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:30,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-25 22:22:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:22:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:22:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:30,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:30,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-25 22:22:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:22:30,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-10-25 22:22:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909290324] [2020-10-25 22:22:30,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:22:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:22:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:22:30,558 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-25 22:22:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:30,742 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-25 22:22:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:22:30,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-25 22:22:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:30,743 INFO L225 Difference]: With dead ends: 51 [2020-10-25 22:22:30,743 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:22:30,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-25 22:22:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:22:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:22:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:22:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:22:30,745 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-25 22:22:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:30,745 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:22:30,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:22:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:22:30,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:22:30,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:22:30,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:22:31,284 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-10-25 22:22:31,418 INFO L274 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-10-25 22:22:31,419 INFO L270 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse0 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 .cse2))))) [2020-10-25 22:22:31,419 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-25 22:22:31,419 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-25 22:22:31,419 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse2 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)))) (or (and .cse0 (<= (+ (div (+ ULTIMATE.start_main_~j~0 (- 1)) 2) 1) ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) (<= ULTIMATE.start_main_~i~0 1) .cse2) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2))) [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-25 22:22:31,420 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:22:31,421 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-25 22:22:31,421 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-10-25 22:22:31,421 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-10-25 22:22:31,422 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~i~0))) (or (= ULTIMATE.start_main_~i~0 0) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= ULTIMATE.start_main_~j~0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2020-10-25 22:22:31,422 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-25 22:22:31,422 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-25 22:22:31,422 INFO L270 CegarLoopResult]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) [2020-10-25 22:22:31,423 INFO L277 CegarLoopResult]: At program point L39(lines 25 40) the Hoare annotation is: true [2020-10-25 22:22:31,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:22:31 BoogieIcfgContainer [2020-10-25 22:22:31,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:22:31,445 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:22:31,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:22:31,445 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:22:31,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:26" (3/4) ... [2020-10-25 22:22:31,449 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:22:31,461 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 22:22:31,461 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:22:31,462 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:22:31,462 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:22:31,515 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:22:31,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:22:31,517 INFO L168 Benchmark]: Toolchain (without parser) took 6012.57 ms. Allocated memory was 48.2 MB in the beginning and 75.5 MB in the end (delta: 27.3 MB). Free memory was 25.0 MB in the beginning and 33.0 MB in the end (delta: -8.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,518 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 48.2 MB. Free memory was 28.1 MB in the beginning and 28.1 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:22:31,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 476.17 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.4 MB in the beginning and 40.6 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,520 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 62.9 MB. Free memory was 40.6 MB in the beginning and 39.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,520 INFO L168 Benchmark]: Boogie Preprocessor took 29.50 ms. Allocated memory is still 62.9 MB. Free memory was 39.1 MB in the beginning and 38.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:22:31,521 INFO L168 Benchmark]: RCFGBuilder took 544.73 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 42.1 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,522 INFO L168 Benchmark]: TraceAbstraction took 4824.76 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 41.6 MB in the beginning and 36.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,523 INFO L168 Benchmark]: Witness Printer took 71.38 ms. Allocated memory is still 75.5 MB. Free memory was 36.4 MB in the beginning and 33.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:31,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 48.2 MB. Free memory was 28.1 MB in the beginning and 28.1 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 476.17 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.4 MB in the beginning and 40.6 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 62.9 MB. Free memory was 40.6 MB in the beginning and 39.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.50 ms. Allocated memory is still 62.9 MB. Free memory was 39.1 MB in the beginning and 38.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 544.73 ms. Allocated memory is still 62.9 MB. Free memory was 38.1 MB in the beginning and 42.1 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4824.76 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 41.6 MB in the beginning and 36.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * Witness Printer took 71.38 ms. Allocated memory is still 75.5 MB. Free memory was 36.4 MB in the beginning and 33.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 34]: Loop Invariant Derived loop invariant: (i == 0 || ((i <= 1 && 1 <= i) && j <= 2 * i)) || ((2 <= n && 1 <= cond) && 1 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && 1 <= i)) || (((2 * i <= j && i == 0) && i + 1 <= n) && j <= 2 * i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((2 * i <= j && (j + -1) / 2 + 1 <= k) && i < n) && k <= j / 2) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 190 SDslu, 215 SDs, 0 SdLazy, 307 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, 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, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 146 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1331 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 232 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 13685 SizeOfPredicates, 19 NumberOfNonLiveVariables, 374 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 56/84 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...