./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/nested_1-1.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/loop-acceleration/nested_1-1.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 3307686edde000bd6f2709f8ce62af668302d3bc ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 10:46:04,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:46:04,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:46:04,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:46:04,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:46:04,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:46:04,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:46:04,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:46:04,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:46:04,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:46:04,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:46:04,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:46:04,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:46:04,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:46:04,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:46:04,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:46:04,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:46:04,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:46:04,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:46:04,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:46:04,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:46:04,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:46:04,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:46:04,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:46:04,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:46:04,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:46:04,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:46:04,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:46:04,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:46:04,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:46:04,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:46:04,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:46:04,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:46:04,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:46:04,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:46:04,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:46:04,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:46:04,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:46:04,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:46:04,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:46:04,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:46:04,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:46:04,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:46:04,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:46:04,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:46:04,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:46:04,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:46:04,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:46:04,532 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:46:04,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:46:04,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:46:04,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:46:04,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:46:04,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:46:04,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:46:04,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:46:04,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:46:04,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:46:04,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:46:04,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:46:04,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:46:04,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:46:04,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:46:04,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:46:04,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:46:04,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:46:04,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:46:04,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:46:04,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:46:04,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:46:04,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:46:04,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:46:04,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3307686edde000bd6f2709f8ce62af668302d3bc [2021-08-29 10:46:04,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:46:04,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:46:04,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:46:04,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:46:04,807 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:46:04,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-08-29 10:46:04,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b644c88/3872739ac8b24e16aab0cee91302c277/FLAG94adf9cc7 [2021-08-29 10:46:05,218 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:46:05,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-08-29 10:46:05,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b644c88/3872739ac8b24e16aab0cee91302c277/FLAG94adf9cc7 [2021-08-29 10:46:05,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b644c88/3872739ac8b24e16aab0cee91302c277 [2021-08-29 10:46:05,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:46:05,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:46:05,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:46:05,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:46:05,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:46:05,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cb79c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05, skipping insertion in model container [2021-08-29 10:46:05,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:46:05,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:46:05,382 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/loop-acceleration/nested_1-1.c[322,335] [2021-08-29 10:46:05,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:46:05,396 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:46:05,405 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/loop-acceleration/nested_1-1.c[322,335] [2021-08-29 10:46:05,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:46:05,416 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:46:05,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05 WrapperNode [2021-08-29 10:46:05,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:46:05,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:46:05,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:46:05,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:46:05,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:46:05,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:46:05,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:46:05,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:46:05,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:46:05,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:46:05,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:46:05,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:46:05,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (1/1) ... [2021-08-29 10:46:05,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:46:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:05,537 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 10:46:05,557 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 10:46:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:46:05,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:46:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:46:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:46:05,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:46:05,719 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-29 10:46:05,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:46:05 BoogieIcfgContainer [2021-08-29 10:46:05,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:46:05,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:46:05,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:46:05,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:46:05,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:46:05" (1/3) ... [2021-08-29 10:46:05,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b34f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:46:05, skipping insertion in model container [2021-08-29 10:46:05,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:46:05" (2/3) ... [2021-08-29 10:46:05,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b34f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:46:05, skipping insertion in model container [2021-08-29 10:46:05,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:46:05" (3/3) ... [2021-08-29 10:46:05,726 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-08-29 10:46:05,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:46:05,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:46:05,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:46:05,783 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 10:46:05,784 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:46:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 10:46:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:46:05,811 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:05,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:46:05,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-08-29 10:46:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:05,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621030812] [2021-08-29 10:46:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:05,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:05,997 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 10:46:05,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:05,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621030812] [2021-08-29 10:46:05,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621030812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:46:05,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:46:05,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 10:46:05,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510163933] [2021-08-29 10:46:06,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 10:46:06,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 10:46:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:46:06,019 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10:46:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:06,070 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2021-08-29 10:46:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 10:46:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-08-29 10:46:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:06,076 INFO L225 Difference]: With dead ends: 25 [2021-08-29 10:46:06,077 INFO L226 Difference]: Without dead ends: 12 [2021-08-29 10:46:06,078 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.97ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:46:06,081 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.71ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:06,081 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 37.71ms Time] [2021-08-29 10:46:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-29 10:46:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-08-29 10:46:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 10:46:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-08-29 10:46:06,101 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-08-29 10:46:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:06,102 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-08-29 10:46:06,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10:46:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-08-29 10:46:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 10:46:06,103 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:06,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:06,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:46:06,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:06,104 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2021-08-29 10:46:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:06,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192223730] [2021-08-29 10:46:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:06,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:46:06,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:06,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192223730] [2021-08-29 10:46:06,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192223730] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:46:06,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:46:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 10:46:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902642406] [2021-08-29 10:46:06,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 10:46:06,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 10:46:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:46:06,171 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 10:46:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:06,227 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-08-29 10:46:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 10:46:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 10:46:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:06,229 INFO L225 Difference]: With dead ends: 18 [2021-08-29 10:46:06,229 INFO L226 Difference]: Without dead ends: 11 [2021-08-29 10:46:06,229 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.46ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:46:06,230 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.67ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:06,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 51.67ms Time] [2021-08-29 10:46:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-29 10:46:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-29 10:46:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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 10:46:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-29 10:46:06,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-08-29 10:46:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:06,234 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-29 10:46:06,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 10:46:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-29 10:46:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 10:46:06,235 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:06,235 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:06,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:46:06,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2021-08-29 10:46:06,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:06,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651764260] [2021-08-29 10:46:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:06,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:06,311 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 10:46:06,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:06,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651764260] [2021-08-29 10:46:06,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651764260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:06,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769030741] [2021-08-29 10:46:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:06,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:06,327 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 10:46:06,328 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 10:46:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 10:46:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:06,469 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 10:46:06,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:46:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 10:46:06,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769030741] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:46:06,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:46:06,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2021-08-29 10:46:06,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349498924] [2021-08-29 10:46:06,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 10:46:06,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 10:46:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:46:06,532 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 10:46:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:06,657 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-08-29 10:46:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 10:46:06,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 10 [2021-08-29 10:46:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:06,658 INFO L225 Difference]: With dead ends: 35 [2021-08-29 10:46:06,658 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 10:46:06,659 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 92.07ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-29 10:46:06,660 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.46ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:06,660 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 54.46ms Time] [2021-08-29 10:46:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 10:46:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 10:46:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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 10:46:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-08-29 10:46:06,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2021-08-29 10:46:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:06,671 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-08-29 10:46:06,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 10:46:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-08-29 10:46:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 10:46:06,672 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:06,673 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:06,693 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 10:46:06,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:06,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash -738026408, now seen corresponding path program 2 times [2021-08-29 10:46:06,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:06,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44406505] [2021-08-29 10:46:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:06,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-08-29 10:46:06,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:06,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44406505] [2021-08-29 10:46:06,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44406505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:06,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174701550] [2021-08-29 10:46:06,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:46:06,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:06,982 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 10:46:06,986 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 10:46:07,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:46:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:46:07,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 10:46:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-08-29 10:46:07,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:46:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-29 10:46:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174701550] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:46:07,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:46:07,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2021-08-29 10:46:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778630700] [2021-08-29 10:46:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 10:46:07,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:07,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 10:46:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:46:07,275 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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 10:46:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:07,580 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-08-29 10:46:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-29 10:46:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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 26 [2021-08-29 10:46:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:07,581 INFO L225 Difference]: With dead ends: 86 [2021-08-29 10:46:07,581 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 10:46:07,582 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 270.00ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-08-29 10:46:07,582 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.29ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:07,583 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 102.29ms Time] [2021-08-29 10:46:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 10:46:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-08-29 10:46:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 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 10:46:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-08-29 10:46:07,589 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 26 [2021-08-29 10:46:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:07,590 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-08-29 10:46:07,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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 10:46:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-08-29 10:46:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-29 10:46:07,590 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:07,591 INFO L513 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:07,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:46:07,804 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,SelfDestructingSolverStorable3 [2021-08-29 10:46:07,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash 256788374, now seen corresponding path program 3 times [2021-08-29 10:46:07,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:07,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128090657] [2021-08-29 10:46:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:07,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-29 10:46:07,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:07,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128090657] [2021-08-29 10:46:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128090657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:07,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533205707] [2021-08-29 10:46:07,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 10:46:07,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:07,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:07,933 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 10:46:07,964 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 10:46:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-29 10:46:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:46:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 10:46:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 79 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-08-29 10:46:08,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:46:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 79 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-08-29 10:46:08,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533205707] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:46:08,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:46:08,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2021-08-29 10:46:08,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736176694] [2021-08-29 10:46:08,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 10:46:08,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 10:46:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-29 10:46:08,143 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 10:46:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:08,244 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2021-08-29 10:46:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 10:46:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 36 [2021-08-29 10:46:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:08,247 INFO L225 Difference]: With dead ends: 102 [2021-08-29 10:46:08,247 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 10:46:08,248 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.74ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:46:08,249 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.56ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:08,250 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 45.56ms Time] [2021-08-29 10:46:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 10:46:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-29 10:46:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 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 10:46:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-08-29 10:46:08,270 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 36 [2021-08-29 10:46:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:08,270 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-08-29 10:46:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 10:46:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-08-29 10:46:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-29 10:46:08,273 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:08,273 INFO L513 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:08,294 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 10:46:08,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:08,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1228631464, now seen corresponding path program 4 times [2021-08-29 10:46:08,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:08,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873531339] [2021-08-29 10:46:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:08,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-08-29 10:46:08,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:08,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873531339] [2021-08-29 10:46:08,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873531339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:08,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895639629] [2021-08-29 10:46:08,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 10:46:08,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:08,609 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 10:46:08,632 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 10:46:08,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 10:46:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:46:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 10:46:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-08-29 10:46:08,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:46:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-08-29 10:46:09,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895639629] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:46:09,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:46:09,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-08-29 10:46:09,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933321581] [2021-08-29 10:46:09,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 10:46:09,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 10:46:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-29 10:46:09,114 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 10:46:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:09,378 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2021-08-29 10:46:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 10:46:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 58 [2021-08-29 10:46:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:09,379 INFO L225 Difference]: With dead ends: 141 [2021-08-29 10:46:09,379 INFO L226 Difference]: Without dead ends: 137 [2021-08-29 10:46:09,380 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 206.11ms TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-08-29 10:46:09,380 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.14ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:09,380 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 102.14ms Time] [2021-08-29 10:46:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-29 10:46:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-08-29 10:46:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 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 10:46:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-08-29 10:46:09,405 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 58 [2021-08-29 10:46:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-08-29 10:46:09,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 10:46:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-08-29 10:46:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-29 10:46:09,407 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:09,407 INFO L513 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:09,440 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 10:46:09,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:09,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1191832584, now seen corresponding path program 5 times [2021-08-29 10:46:09,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:09,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304835561] [2021-08-29 10:46:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:09,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-08-29 10:46:09,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:09,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304835561] [2021-08-29 10:46:09,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304835561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:09,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347217983] [2021-08-29 10:46:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 10:46:09,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:09,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:09,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:46:09,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 10:46:13,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-08-29 10:46:13,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:46:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 10:46:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-08-29 10:46:14,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:46:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-08-29 10:46:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347217983] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:46:14,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:46:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-08-29 10:46:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79675872] [2021-08-29 10:46:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 10:46:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 10:46:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-08-29 10:46:14,678 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 10:46:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:18,774 INFO L93 Difference]: Finished difference Result 297 states and 330 transitions. [2021-08-29 10:46:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-29 10:46:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 136 [2021-08-29 10:46:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:18,776 INFO L225 Difference]: With dead ends: 297 [2021-08-29 10:46:18,776 INFO L226 Difference]: Without dead ends: 293 [2021-08-29 10:46:18,776 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3974.15ms TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 10:46:18,777 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 279.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 352.07ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:18,782 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 618 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [18 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 352.07ms Time] [2021-08-29 10:46:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-29 10:46:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-08-29 10:46:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0787671232876712) internal successors, (315), 292 states have internal predecessors, (315), 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 10:46:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 315 transitions. [2021-08-29 10:46:18,810 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 315 transitions. Word has length 136 [2021-08-29 10:46:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:18,810 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 315 transitions. [2021-08-29 10:46:18,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 10:46:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 315 transitions. [2021-08-29 10:46:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-08-29 10:46:18,819 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:46:18,819 INFO L513 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-08-29 10:46:18,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 10:46:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:19,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:46:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:46:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1761742648, now seen corresponding path program 6 times [2021-08-29 10:46:19,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:46:19,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508525571] [2021-08-29 10:46:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:46:19,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:46:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:46:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2021-08-29 10:46:19,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:46:19,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508525571] [2021-08-29 10:46:19,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508525571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:46:19,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207760946] [2021-08-29 10:46:19,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 10:46:19,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:19,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:46:19,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:46:19,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 10:46:20,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-08-29 10:46:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:46:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 10:46:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:46:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 2584 proven. 0 refuted. 0 times theorem prover too weak. 27061 trivial. 0 not checked. [2021-08-29 10:46:21,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:46:21,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207760946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:46:21,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:46:21,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2021-08-29 10:46:21,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395514285] [2021-08-29 10:46:21,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 10:46:21,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:46:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 10:46:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-08-29 10:46:21,457 INFO L87 Difference]: Start difference. First operand 293 states and 315 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 10:46:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:46:21,592 INFO L93 Difference]: Finished difference Result 293 states and 315 transitions. [2021-08-29 10:46:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 10:46:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 292 [2021-08-29 10:46:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:46:21,593 INFO L225 Difference]: With dead ends: 293 [2021-08-29 10:46:21,593 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 10:46:21,594 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 461.55ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-29 10:46:21,595 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.19ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 18.85ms IncrementalHoareTripleChecker+Time [2021-08-29 10:46:21,595 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.19ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 8 Unchecked, 18.85ms Time] [2021-08-29 10:46:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 10:46:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 10:46:21,595 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 10:46:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 10:46:21,596 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 292 [2021-08-29 10:46:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:46:21,596 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 10:46:21,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 10:46:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 10:46:21,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 10:46:21,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:46:21,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 10:46:21,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:46:21,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 10:46:21,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:46:21,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:46:21,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:46:21,986 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L854 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (or (= ULTIMATE.start_main_~x~0 0) (and (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455) (< (mod ULTIMATE.start_main_~x~0 4294967296) 268435455))) [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L854 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455)) [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-08-29 10:46:21,987 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 1 27) the Hoare annotation is: true [2021-08-29 10:46:21,990 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:46:21,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:46:21 BoogieIcfgContainer [2021-08-29 10:46:21,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:46:22,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:46:22,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:46:22,000 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:46:22,000 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:46:05" (3/4) ... [2021-08-29 10:46:22,007 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 10:46:22,015 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-29 10:46:22,015 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 10:46:22,015 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:46:22,015 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:46:22,039 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:46:22,039 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:46:22,040 INFO L158 Benchmark]: Toolchain (without parser) took 16803.48ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 36.8MB in the beginning and 41.7MB in the end (delta: -4.9MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,040 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:46:22,040 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.16ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 27.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,041 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.55ms. Allocated memory is still 58.7MB. Free memory was 42.4MB in the beginning and 41.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,041 INFO L158 Benchmark]: Boogie Preprocessor took 33.37ms. Allocated memory is still 58.7MB. Free memory was 40.9MB in the beginning and 40.0MB in the end (delta: 920.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:46:22,041 INFO L158 Benchmark]: RCFGBuilder took 207.73ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 31.8MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,042 INFO L158 Benchmark]: TraceAbstraction took 16277.99ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 31.3MB in the beginning and 43.8MB in the end (delta: -12.5MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,042 INFO L158 Benchmark]: Witness Printer took 39.95ms. Allocated memory is still 86.0MB. Free memory was 43.8MB in the beginning and 41.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:46:22,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 40.1MB in the beginning and 40.0MB in the end (delta: 42.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.16ms. Allocated memory is still 58.7MB. Free memory was 36.7MB in the beginning and 27.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.55ms. Allocated memory is still 58.7MB. Free memory was 42.4MB in the beginning and 41.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.37ms. Allocated memory is still 58.7MB. Free memory was 40.9MB in the beginning and 40.0MB in the end (delta: 920.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 207.73ms. Allocated memory is still 58.7MB. Free memory was 40.0MB in the beginning and 31.8MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 16277.99ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 31.3MB in the beginning and 43.8MB in the end (delta: -12.5MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. * Witness Printer took 39.95ms. Allocated memory is still 86.0MB. Free memory was 43.8MB in the beginning and 41.7MB in the end (delta: 2.0MB). 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: 7]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16214.24ms, OverallIterations: 8, TraceHistogramMax: 220, EmptinessCheckTime: 33.31ms, AutomataDifference: 5201.50ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 180.18ms, InitialAbstractionConstructionTime: 7.84ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 179 SdHoareTripleChecker+Valid, 764.75ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 179 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 604.77ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8 IncrementalHoareTripleChecker+Unchecked, 460 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1153 IncrementalHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 0 mSDtfsCounter, 1153 mSolverCounterSat, 11.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 922 GetRequests, 789 SyntacticMatches, 3 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5111.04ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=293occurred in iteration=7, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 94.81ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 275 NumberOfFragments, 33 HoareAnnotationTreeSize, 3 FomulaSimplifications, 8830 FormulaSimplificationTreeSizeReduction, 139.25ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 76 FormulaSimplificationTreeSizeReductionInter, 35.19ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 91.75ms SsaConstructionTime, 5488.56ms SatisfiabilityAnalysisTime, 3553.32ms InterpolantComputationTime, 1131 NumberOfCodeBlocks, 891 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 1378 ConstructedInterpolants, 1 QuantifiedInterpolants, 6513 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1026 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 34102/81455 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 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x == 0 || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (y == 0 && x == 0) || (x + 4294967295) % 4294967296 < 268435455 RESULT: Ultimate proved your program to be correct! [2021-08-29 10:46:22,067 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...