./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/half.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-new/half.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 41a31ab8e42c0ba8256484457a81b8567cde71c6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:23:58,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:23:58,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:23:58,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:23:58,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:23:58,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:23:58,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:23:58,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:23:58,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:23:58,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:23:58,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:23:58,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:23:58,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:23:58,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:23:58,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:23:58,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:23:58,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:23:58,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:23:58,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:23:58,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:23:58,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:23:58,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:23:58,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:23:58,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:23:58,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:23:58,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:23:58,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:23:58,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:23:58,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:23:58,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:23:58,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:23:58,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:23:58,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:23:58,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:23:58,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:23:58,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:23:58,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:23:58,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:23:58,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:23:58,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:23:58,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:23:58,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:23:58,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:23:58,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:23:58,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:23:58,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:23:58,296 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:23:58,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:23:58,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:23:58,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:23:58,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:23:58,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:23:58,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:23:58,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:23:58,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:23:58,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:23:58,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:23:58,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:23:58,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:23:58,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:23:58,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:23:58,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:23:58,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:23:58,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:23:58,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:23:58,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:23:58,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:23:58,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:23:58,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:23:58,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:23:58,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:23:58,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41a31ab8e42c0ba8256484457a81b8567cde71c6 [2020-10-25 22:23:58,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:23:58,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:23:58,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:23:58,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:23:58,767 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:23:58,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/half.i [2020-10-25 22:23:58,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e7f9bf/e1b506c90656440e89b47e8c81cc756e/FLAGa9e2d4020 [2020-10-25 22:23:59,565 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:23:59,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/half.i [2020-10-25 22:23:59,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e7f9bf/e1b506c90656440e89b47e8c81cc756e/FLAGa9e2d4020 [2020-10-25 22:23:59,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e7f9bf/e1b506c90656440e89b47e8c81cc756e [2020-10-25 22:23:59,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:23:59,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:23:59,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:23:59,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:23:59,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:23:59,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:23:59" (1/1) ... [2020-10-25 22:23:59,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17622b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:23:59, skipping insertion in model container [2020-10-25 22:23:59,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:23:59" (1/1) ... [2020-10-25 22:23:59,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:24:00,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:24:00,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:24:00,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:24:00,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:24:00,220 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:24:00,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00 WrapperNode [2020-10-25 22:24:00,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:24:00,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:24:00,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:24:00,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:24:00,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:24:00,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:24:00,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:24:00,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:24:00,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (1/1) ... [2020-10-25 22:24:00,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:24:00,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:24:00,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:24:00,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:24:00,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (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 22:24:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:24:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:24:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:24:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:24:00,748 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:24:00,748 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:24:00,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:24:00 BoogieIcfgContainer [2020-10-25 22:24:00,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:24:00,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:24:00,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:24:00,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:24:00,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:23:59" (1/3) ... [2020-10-25 22:24:00,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b74dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:24:00, skipping insertion in model container [2020-10-25 22:24:00,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:24:00" (2/3) ... [2020-10-25 22:24:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b74dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:24:00, skipping insertion in model container [2020-10-25 22:24:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:24:00" (3/3) ... [2020-10-25 22:24:00,766 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2020-10-25 22:24:00,781 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:24:00,787 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:24:00,817 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:24:00,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:24:00,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:24:00,876 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:24:00,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:24:00,877 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:24:00,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:24:00,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:24:00,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:24:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:24:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:24:00,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:00,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:00,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1623704393, now seen corresponding path program 1 times [2020-10-25 22:24:00,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473961277] [2020-10-25 22:24:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:01,136 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 22:24:01,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473961277] [2020-10-25 22:24:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:24:01,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:24:01,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817832633] [2020-10-25 22:24:01,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:24:01,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:24:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:24:01,168 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-25 22:24:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:01,188 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-25 22:24:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:24:01,191 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-25 22:24:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:01,209 INFO L225 Difference]: With dead ends: 27 [2020-10-25 22:24:01,209 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:24:01,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:24:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:24:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:24:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:24:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-25 22:24:01,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2020-10-25 22:24:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:01,271 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-25 22:24:01,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:24:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-25 22:24:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:24:01,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:01,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:01,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:24:01,273 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1308783732, now seen corresponding path program 1 times [2020-10-25 22:24:01,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:01,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392109778] [2020-10-25 22:24:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:01,446 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 22:24:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392109778] [2020-10-25 22:24:01,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:24:01,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 22:24:01,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470007756] [2020-10-25 22:24:01,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:24:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:01,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:24:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:24:01,451 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-10-25 22:24:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:01,557 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-10-25 22:24:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:24:01,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-10-25 22:24:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:01,559 INFO L225 Difference]: With dead ends: 25 [2020-10-25 22:24:01,559 INFO L226 Difference]: Without dead ends: 14 [2020-10-25 22:24:01,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:24:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-25 22:24:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-25 22:24:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:24:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-25 22:24:01,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-10-25 22:24:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:01,565 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-25 22:24:01,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:24:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-25 22:24:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:24:01,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:01,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:01,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:24:01,567 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:01,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1738166015, now seen corresponding path program 1 times [2020-10-25 22:24:01,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:01,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141288316] [2020-10-25 22:24:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:01,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141288316] [2020-10-25 22:24:01,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275565588] [2020-10-25 22:24:01,806 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 22:24:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:24:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:24:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:01,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:24:01,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:24:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278516256] [2020-10-25 22:24:01,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:24:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:24:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:24:01,965 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-10-25 22:24:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:02,025 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-25 22:24:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:24:02,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-25 22:24:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:02,026 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:24:02,027 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 22:24:02,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:24:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 22:24:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-25 22:24:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:24:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-25 22:24:02,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-25 22:24:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:02,033 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-25 22:24:02,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:24:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-25 22:24:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:24:02,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:02,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:02,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 22:24:02,247 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1241815916, now seen corresponding path program 2 times [2020-10-25 22:24:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:02,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705446458] [2020-10-25 22:24:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705446458] [2020-10-25 22:24:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592409560] [2020-10-25 22:24:02,346 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 [2020-10-25 22:24:02,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:24:02,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:24:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:24:02,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:24:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:02,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:24:02,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 22:24:02,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816159706] [2020-10-25 22:24:02,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:24:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:24:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:24:02,469 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-25 22:24:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:02,522 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-25 22:24:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:24:02,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-25 22:24:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:02,523 INFO L225 Difference]: With dead ends: 28 [2020-10-25 22:24:02,524 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:24:02,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:24:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:24:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-25 22:24:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 22:24:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-25 22:24:02,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-25 22:24:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:02,536 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-25 22:24:02,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:24:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-25 22:24:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:24:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:02,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:02,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:24:02,753 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2051162542, now seen corresponding path program 1 times [2020-10-25 22:24:02,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:02,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822025329] [2020-10-25 22:24:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:03,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822025329] [2020-10-25 22:24:03,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180965563] [2020-10-25 22:24:03,063 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 22:24:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 22:24:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:24:03,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:24:03,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:24:03,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:24:03,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:24:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:03,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:24:03,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-25 22:24:03,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77159812] [2020-10-25 22:24:03,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 22:24:03,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 22:24:03,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-25 22:24:03,306 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2020-10-25 22:24:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:03,543 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-25 22:24:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-25 22:24:03,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2020-10-25 22:24:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:03,546 INFO L225 Difference]: With dead ends: 32 [2020-10-25 22:24:03,546 INFO L226 Difference]: Without dead ends: 24 [2020-10-25 22:24:03,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-25 22:24:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-25 22:24:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-10-25 22:24:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-25 22:24:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-25 22:24:03,554 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-25 22:24:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:03,554 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-25 22:24:03,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 22:24:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-25 22:24:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:24:03,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:03,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:03,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:24:03,775 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:03,776 INFO L82 PathProgramCache]: Analyzing trace with hash -208449439, now seen corresponding path program 2 times [2020-10-25 22:24:03,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:03,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217871010] [2020-10-25 22:24:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217871010] [2020-10-25 22:24:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706267728] [2020-10-25 22:24:03,907 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 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 22:24:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:24:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:24:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-25 22:24:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:24:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:04,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:24:04,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-25 22:24:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730945076] [2020-10-25 22:24:04,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 22:24:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 22:24:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-25 22:24:04,077 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 15 states. [2020-10-25 22:24:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:04,287 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-25 22:24:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 22:24:04,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-25 22:24:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:04,289 INFO L225 Difference]: With dead ends: 39 [2020-10-25 22:24:04,289 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 22:24:04,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-25 22:24:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 22:24:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-25 22:24:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 22:24:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-25 22:24:04,295 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-25 22:24:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-25 22:24:04,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 22:24:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-25 22:24:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 22:24:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:24:04,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:24:04,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:24:04,509 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:24:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:24:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1271245232, now seen corresponding path program 3 times [2020-10-25 22:24:04,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:24:04,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652207089] [2020-10-25 22:24:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:24:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:24:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 22:24:04,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652207089] [2020-10-25 22:24:04,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224754986] [2020-10-25 22:24:04,762 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 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 22:24:04,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 22:24:04,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:24:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-25 22:24:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:24:05,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:24:05,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:24:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:24:05,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:24:05,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2020-10-25 22:24:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644294755] [2020-10-25 22:24:05,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-25 22:24:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:24:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-25 22:24:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-25 22:24:05,134 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 22 states. [2020-10-25 22:24:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:24:05,530 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-25 22:24:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-25 22:24:05,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-10-25 22:24:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:24:05,531 INFO L225 Difference]: With dead ends: 38 [2020-10-25 22:24:05,532 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:24:05,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-25 22:24:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:24:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:24:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:24:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:24:05,534 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-25 22:24:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:24:05,534 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:24:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-25 22:24:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:24:05,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:24:05,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-25 22:24:05,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:24:05,895 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:24:05,896 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2020-10-25 22:24:05,896 INFO L270 CegarLoopResult]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~n~0))) (or (and (= ULTIMATE.start_main_~n~0 0) (= ULTIMATE.start_main_~i~0 0)) (and (<= .cse0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 .cse0) (< ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_main_~k~0 1))) (let ((.cse1 (+ ULTIMATE.start_main_~i~0 1))) (and (<= .cse1 (* 2 ULTIMATE.start_main_~k~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))))) [2020-10-25 22:24:05,896 INFO L274 CegarLoopResult]: For program point L29-4(lines 29 33) no Hoare annotation was computed. [2020-10-25 22:24:05,896 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-25 22:24:05,896 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-25 22:24:05,897 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-10-25 22:24:05,897 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-25 22:24:05,898 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-25 22:24:05,898 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-25 22:24:05,898 INFO L277 CegarLoopResult]: At program point L35(lines 24 36) the Hoare annotation is: true [2020-10-25 22:24:05,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:24:05 BoogieIcfgContainer [2020-10-25 22:24:05,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:24:05,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:24:05,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:24:05,917 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:24:05,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:24:00" (3/4) ... [2020-10-25 22:24:05,921 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:24:05,932 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 22:24:05,933 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:24:05,933 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:24:05,933 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:24:05,978 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:24:05,983 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:24:05,985 INFO L168 Benchmark]: Toolchain (without parser) took 6076.19 ms. Allocated memory was 39.8 MB in the beginning and 71.3 MB in the end (delta: 31.5 MB). Free memory was 17.2 MB in the beginning and 44.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,988 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 24.4 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:24:05,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.50 ms. Allocated memory is still 39.8 MB. Free memory was 16.6 MB in the beginning and 16.3 MB in the end (delta: 270.4 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.06 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 16.3 MB in the beginning and 33.2 MB in the end (delta: -16.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,992 INFO L168 Benchmark]: Boogie Preprocessor took 53.55 ms. Allocated memory is still 48.2 MB. Free memory was 33.2 MB in the beginning and 32.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:24:05,992 INFO L168 Benchmark]: RCFGBuilder took 420.01 ms. Allocated memory is still 48.2 MB. Free memory was 32.1 MB in the beginning and 21.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,993 INFO L168 Benchmark]: TraceAbstraction took 5159.90 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 32.4 MB in the beginning and 46.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 32.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,994 INFO L168 Benchmark]: Witness Printer took 67.04 ms. Allocated memory is still 71.3 MB. Free memory was 46.8 MB in the beginning and 44.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:24:05,997 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 39.8 MB. Free memory was 24.5 MB in the beginning and 24.4 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.50 ms. Allocated memory is still 39.8 MB. Free memory was 16.6 MB in the beginning and 16.3 MB in the end (delta: 270.4 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.06 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 16.3 MB in the beginning and 33.2 MB in the end (delta: -16.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.55 ms. Allocated memory is still 48.2 MB. Free memory was 33.2 MB in the beginning and 32.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 420.01 ms. Allocated memory is still 48.2 MB. Free memory was 32.1 MB in the beginning and 21.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5159.90 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 32.4 MB in the beginning and 46.8 MB in the end (delta: -14.4 MB). Peak memory consumption was 32.9 MB. Max. memory is 16.1 GB. * Witness Printer took 67.04 ms. Allocated memory is still 71.3 MB. Free memory was 46.8 MB in the beginning and 44.7 MB in the end (delta: 2.1 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: 29]: Loop Invariant Derived loop invariant: ((n == 0 && i == 0) || ((2 * n <= i && i <= 2 * n) && n < k + 1)) || ((i + 1 <= 2 * k && i + 1 <= 2 * n) && 2 * n <= i + 1) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 67 SDslu, 163 SDs, 0 SdLazy, 519 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=6, 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, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 12 NumberOfFragments, 48 HoareAnnotationTreeSize, 3 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 16120 SizeOfPredicates, 17 NumberOfNonLiveVariables, 307 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 7/90 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...