./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/fermat2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/nla-digbench/fermat2-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ce67436ef108cb42224517f75d26c39c6217fd3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:52:48,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:52:48,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:52:48,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:52:48,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:52:48,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:52:48,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:52:48,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:52:48,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:52:48,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:52:48,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:52:48,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:52:48,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:52:48,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:52:48,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:52:48,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:52:48,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:52:48,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:52:48,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:52:48,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:52:48,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:52:48,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:52:48,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:52:48,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:52:48,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:52:48,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:52:48,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:52:48,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:52:48,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:52:48,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:52:48,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:52:48,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:52:48,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:52:48,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:52:48,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:52:48,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:52:48,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:52:48,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:52:48,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:52:48,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:52:48,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:52:48,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:52:48,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:52:48,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:52:48,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:52:48,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:52:48,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:52:48,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:52:48,403 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:52:48,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:52:48,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:52:48,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:52:48,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:52:48,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:52:48,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:52:48,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:52:48,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:52:48,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ce67436ef108cb42224517f75d26c39c6217fd3 [2021-08-29 11:52:48,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:52:48,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:52:48,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:52:48,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:52:48,722 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:52:48,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/fermat2-ll.c [2021-08-29 11:52:48,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3293758d5/1d17d52410f9443894f89c64eb88e2d2/FLAGb97d05507 [2021-08-29 11:52:49,159 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:52:49,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/fermat2-ll.c [2021-08-29 11:52:49,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3293758d5/1d17d52410f9443894f89c64eb88e2d2/FLAGb97d05507 [2021-08-29 11:52:49,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3293758d5/1d17d52410f9443894f89c64eb88e2d2 [2021-08-29 11:52:49,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:52:49,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:52:49,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:52:49,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:52:49,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:52:49,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74179ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49, skipping insertion in model container [2021-08-29 11:52:49,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:52:49,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:52:49,355 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/fermat2-ll.c[524,537] [2021-08-29 11:52:49,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:52:49,380 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:52:49,400 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/fermat2-ll.c[524,537] [2021-08-29 11:52:49,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:52:49,436 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:52:49,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49 WrapperNode [2021-08-29 11:52:49,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:52:49,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:52:49,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:52:49,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:52:49,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:52:49,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:52:49,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:52:49,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:52:49,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:52:49,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:52:49,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:52:49,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:52:49,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (1/1) ... [2021-08-29 11:52:49,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:52:49,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:52:49,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 11:52:49,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 11:52:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:52:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:52:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:52:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:52:49,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:52:49,757 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 11:52:49,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:52:49 BoogieIcfgContainer [2021-08-29 11:52:49,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:52:49,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:52:49,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:52:49,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:52:49,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:52:49" (1/3) ... [2021-08-29 11:52:49,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1b0ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:52:49, skipping insertion in model container [2021-08-29 11:52:49,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:52:49" (2/3) ... [2021-08-29 11:52:49,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1b0ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:52:49, skipping insertion in model container [2021-08-29 11:52:49,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:52:49" (3/3) ... [2021-08-29 11:52:49,766 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll.c [2021-08-29 11:52:49,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:52:49,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 11:52:49,818 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:52:49,825 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 11:52:49,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 11:52:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 11:52:49,847 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:52:49,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:52:49,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:52:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:52:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-08-29 11:52:49,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:52:49,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602688867] [2021-08-29 11:52:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:49,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:52:49,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 11:52:49,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867959325] [2021-08-29 11:52:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:49,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:52:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:52:49,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:52:50,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 11:52:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:52:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 11:52:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:52:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:52:50,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 11:52:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:52:50,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602688867] [2021-08-29 11:52:50,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 11:52:50,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867959325] [2021-08-29 11:52:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867959325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:52:50,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:52:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 11:52:50,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305593019] [2021-08-29 11:52:50,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 11:52:50,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:52:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 11:52:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:52:50,232 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:52:50,265 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-08-29 11:52:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 11:52:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-29 11:52:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:52:50,271 INFO L225 Difference]: With dead ends: 37 [2021-08-29 11:52:50,272 INFO L226 Difference]: Without dead ends: 16 [2021-08-29 11:52:50,274 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.05ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:52:50,277 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.46ms IncrementalHoareTripleChecker+Time [2021-08-29 11:52:50,278 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.21ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 22.46ms Time] [2021-08-29 11:52:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-29 11:52:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-29 11:52:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-29 11:52:50,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2021-08-29 11:52:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:52:50,300 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-29 11:52:50,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-29 11:52:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 11:52:50,301 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:52:50,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:52:50,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 11:52:50,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-29 11:52:50,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:52:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:52:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-08-29 11:52:50,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:52:50,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250446819] [2021-08-29 11:52:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:50,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:52:50,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 11:52:50,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350663544] [2021-08-29 11:52:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:50,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:52:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:52:50,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:52:50,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 11:52:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:52:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 11:52:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:52:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:52:50,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 11:52:50,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:52:50,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250446819] [2021-08-29 11:52:50,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 11:52:50,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350663544] [2021-08-29 11:52:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350663544] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:52:50,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:52:50,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 11:52:50,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013674386] [2021-08-29 11:52:50,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:52:50,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:52:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:52:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:52:50,766 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:53,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 11:52:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:52:53,731 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-08-29 11:52:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:52:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-29 11:52:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:52:53,732 INFO L225 Difference]: With dead ends: 24 [2021-08-29 11:52:53,732 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 11:52:53,733 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.84ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:52:53,734 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2941.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2956.24ms IncrementalHoareTripleChecker+Time [2021-08-29 11:52:53,734 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 51 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2956.24ms Time] [2021-08-29 11:52:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 11:52:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-08-29 11:52:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-29 11:52:53,738 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 9 [2021-08-29 11:52:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:52:53,738 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-29 11:52:53,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:52:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-29 11:52:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 11:52:53,739 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:52:53,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:52:53,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 11:52:53,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-29 11:52:53,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:52:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:52:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 636930749, now seen corresponding path program 1 times [2021-08-29 11:52:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:52:53,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583083237] [2021-08-29 11:52:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:53,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:52:53,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 11:52:53,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341928958] [2021-08-29 11:52:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:52:53,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:52:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:52:53,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:52:53,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 11:52:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:52:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 11:52:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:52:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:52:54,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 11:52:54,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:52:54,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583083237] [2021-08-29 11:52:54,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 11:52:54,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341928958] [2021-08-29 11:52:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341928958] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:52:54,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:52:54,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 11:52:54,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416935123] [2021-08-29 11:52:54,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 11:52:54,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:52:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 11:52:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 11:52:54,107 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:04,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 11:53:13,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 11:53:17,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 11:53:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:53:18,083 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 11:53:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:53:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 11:53:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:53:18,084 INFO L225 Difference]: With dead ends: 22 [2021-08-29 11:53:18,084 INFO L226 Difference]: Without dead ends: 16 [2021-08-29 11:53:18,084 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.65ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-29 11:53:18,086 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23920.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23934.70ms IncrementalHoareTripleChecker+Time [2021-08-29 11:53:18,086 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 3 Unknown, 0 Unchecked, 23934.70ms Time] [2021-08-29 11:53:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-29 11:53:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-08-29 11:53:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-29 11:53:18,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-08-29 11:53:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:53:18,089 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-29 11:53:18,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-29 11:53:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 11:53:18,089 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:53:18,089 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:53:18,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 11:53:18,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:53:18,308 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:53:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:53:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1728372471, now seen corresponding path program 1 times [2021-08-29 11:53:18,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:53:18,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058120953] [2021-08-29 11:53:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:53:18,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:53:18,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 11:53:18,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991314386] [2021-08-29 11:53:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:53:18,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:53:18,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:53:18,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:53:18,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 11:53:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:53:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 11:53:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:53:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:53:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:53:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:53:18,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:53:18,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058120953] [2021-08-29 11:53:18,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 11:53:18,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991314386] [2021-08-29 11:53:18,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991314386] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:53:18,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:53:18,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-08-29 11:53:18,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863138274] [2021-08-29 11:53:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 11:53:18,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:53:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 11:53:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-29 11:53:18,707 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:53:18,877 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-08-29 11:53:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:53:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 11:53:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:53:18,877 INFO L225 Difference]: With dead ends: 25 [2021-08-29 11:53:18,878 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:53:18,878 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 286.66ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:53:18,879 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.51ms IncrementalHoareTripleChecker+Time [2021-08-29 11:53:18,879 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [22 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 84.51ms Time] [2021-08-29 11:53:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:53:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:53:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:53:18,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-08-29 11:53:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:53:18,880 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:53:18,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:53:18,880 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:53:18,882 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 11:53:18,883 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 11:53:18,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 11:53:19,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:53:19,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:53:19,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:53:19,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:53:19,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:53:19,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:53:24,332 WARN L210 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-08-29 11:53:24,335 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 11:53:24,335 INFO L861 garLoopResultBuilder]: At program point L48(lines 19 49) the Hoare annotation is: true [2021-08-29 11:53:24,335 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:53:24,335 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:53:24,335 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L854 garLoopResultBuilder]: At program point L12-2(line 35) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* 2 ULTIMATE.start_main_~u~0) (* 4 ULTIMATE.start_main_~A~0) (* ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~v~0) (* 4 ULTIMATE.start_main_~r~0)) (+ (* ULTIMATE.start_main_~u~0 ULTIMATE.start_main_~u~0) (* 2 ULTIMATE.start_main_~v~0)))) [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L861 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: true [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L37(lines 37 43) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L854 garLoopResultBuilder]: At program point L37-2(lines 33 44) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 ULTIMATE.start_main_~u~0) (* 4 ULTIMATE.start_main_~A~0) (* ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~v~0) (* 4 ULTIMATE.start_main_~r~0)) (+ (* ULTIMATE.start_main_~u~0 ULTIMATE.start_main_~u~0) (* 2 ULTIMATE.start_main_~v~0))))) (or (and (= (mod (+ ULTIMATE.start_main_~u~0 1) (- 2)) 0) (= ULTIMATE.start_main_~v~0 1) .cse0) (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L33-2(lines 33 44) no Hoare annotation was computed. [2021-08-29 11:53:24,336 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-29 11:53:24,337 INFO L858 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-29 11:53:24,337 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-29 11:53:24,337 INFO L858 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-08-29 11:53:24,340 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:53:24,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:53:24 BoogieIcfgContainer [2021-08-29 11:53:24,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:53:24,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:53:24,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:53:24,362 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:53:24,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:52:49" (3/4) ... [2021-08-29 11:53:24,364 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:53:24,369 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-08-29 11:53:24,374 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:53:24,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:53:24,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:53:24,533 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:53:24,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:53:24,534 INFO L158 Benchmark]: Toolchain (without parser) took 35351.12ms. Allocated memory was 44.0MB in the beginning and 67.1MB in the end (delta: 23.1MB). Free memory was 20.8MB in the beginning and 36.5MB in the end (delta: -15.7MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-08-29 11:53:24,534 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 44.0MB. Free memory was 27.2MB in the beginning and 27.1MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:24,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.79ms. Allocated memory was 44.0MB in the beginning and 54.5MB in the end (delta: 10.5MB). Free memory was 20.6MB in the beginning and 38.2MB in the end (delta: -17.6MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-08-29 11:53:24,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.36ms. Allocated memory is still 54.5MB. Free memory was 38.0MB in the beginning and 36.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:24,535 INFO L158 Benchmark]: Boogie Preprocessor took 35.13ms. Allocated memory is still 54.5MB. Free memory was 36.5MB in the beginning and 35.5MB in the end (delta: 988.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:24,535 INFO L158 Benchmark]: RCFGBuilder took 253.63ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 38.1MB in the end (delta: -2.7MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-08-29 11:53:24,535 INFO L158 Benchmark]: TraceAbstraction took 34600.31ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 37.6MB in the beginning and 39.0MB in the end (delta: -1.5MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-08-29 11:53:24,535 INFO L158 Benchmark]: Witness Printer took 172.19ms. Allocated memory is still 67.1MB. Free memory was 39.0MB in the beginning and 36.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:53:24,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 44.0MB. Free memory was 27.2MB in the beginning and 27.1MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.79ms. Allocated memory was 44.0MB in the beginning and 54.5MB in the end (delta: 10.5MB). Free memory was 20.6MB in the beginning and 38.2MB in the end (delta: -17.6MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.36ms. Allocated memory is still 54.5MB. Free memory was 38.0MB in the beginning and 36.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.13ms. Allocated memory is still 54.5MB. Free memory was 36.5MB in the beginning and 35.5MB in the end (delta: 988.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 253.63ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 38.1MB in the end (delta: -2.7MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * TraceAbstraction took 34600.31ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 37.6MB in the beginning and 39.0MB in the end (delta: -1.5MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * Witness Printer took 172.19ms. Allocated memory is still 67.1MB. Free memory was 39.0MB in the beginning and 36.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 34523.01ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 10.03ms, AutomataDifference: 27197.04ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 5242.06ms, InitialAbstractionConstructionTime: 10.52ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 26997.92ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 26949.31ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189 IncrementalHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 0 mSDtfsCounter, 189 mSolverCounterSat, 2.88ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 353.20ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 16.40ms AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 15 NumberOfFragments, 85 HoareAnnotationTreeSize, 4 FomulaSimplifications, 289 FormulaSimplificationTreeSizeReduction, 38.17ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 103 FormulaSimplificationTreeSizeReductionInter, 5199.25ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 17.73ms SsaConstructionTime, 80.64ms SatisfiabilityAnalysisTime, 676.70ms InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 383 SizeOfPredicates, 20 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 1/4 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 == cond && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((u + 1) % -2 == 0 && v == 1) && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v) || (1 <= cond && 2 * u + 4 * A + v * v + 4 * r == u * u + 2 * v) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:53:24,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...