./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/MADWiFi-encode_ie_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/MADWiFi-encode_ie_ok.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c573b473fe5d13973daf8eaca36a6666498a98a .......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:34:45,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:34:45,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:34:45,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:34:45,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:34:45,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:34:45,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:34:45,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:34:45,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:34:45,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:34:45,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:34:45,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:34:45,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:34:45,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:34:45,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:34:45,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:34:45,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:34:45,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:34:45,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:34:45,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:34:45,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:34:45,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:34:45,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:34:45,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:34:45,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:34:45,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:34:45,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:34:45,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:34:45,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:34:45,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:34:45,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:34:45,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:34:45,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:34:45,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:34:45,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:34:45,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:34:45,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:34:45,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:34:45,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:34:45,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:34:45,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:34:45,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:34:45,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:34:45,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:34:45,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:34:45,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:34:45,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:34:45,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:34:45,370 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:34:45,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:34:45,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:34:45,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:34:45,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:34:45,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:34:45,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:34:45,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:34:45,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:34:45,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:34:45,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:34:45,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:34:45,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:34:45,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:34:45,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:34:45,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:34:45,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:34:45,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:34:45,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:34:45,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c573b473fe5d13973daf8eaca36a6666498a98a [2021-08-26 03:34:45,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:34:45,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:34:45,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:34:45,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:34:45,693 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:34:45,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/MADWiFi-encode_ie_ok.i [2021-08-26 03:34:45,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956ce4e52/aca5615ab34946c29a3659cce0733532/FLAG4ab7ca8d8 [2021-08-26 03:34:46,180 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:34:46,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/MADWiFi-encode_ie_ok.i [2021-08-26 03:34:46,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956ce4e52/aca5615ab34946c29a3659cce0733532/FLAG4ab7ca8d8 [2021-08-26 03:34:46,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/956ce4e52/aca5615ab34946c29a3659cce0733532 [2021-08-26 03:34:46,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:34:46,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:34:46,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:34:46,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:34:46,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:34:46,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df9bb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46, skipping insertion in model container [2021-08-26 03:34:46,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:34:46,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:34:46,382 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-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-08-26 03:34:46,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:34:46,408 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:34:46,467 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-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-08-26 03:34:46,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:34:46,497 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:34:46,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46 WrapperNode [2021-08-26 03:34:46,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:34:46,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:34:46,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:34:46,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:34:46,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:34:46,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:34:46,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:34:46,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:34:46,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:34:46,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:34:46,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:34:46,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:34:46,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (1/1) ... [2021-08-26 03:34:46,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:34:46,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:46,606 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) [2021-08-26 03:34:46,630 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 [2021-08-26 03:34:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:34:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:34:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:34:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:34:46,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:34:46,881 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 03:34:46,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:46 BoogieIcfgContainer [2021-08-26 03:34:46,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:34:46,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:34:46,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:34:46,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:34:46,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:34:46" (1/3) ... [2021-08-26 03:34:46,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82197d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:46, skipping insertion in model container [2021-08-26 03:34:46,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:46" (2/3) ... [2021-08-26 03:34:46,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82197d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:46, skipping insertion in model container [2021-08-26 03:34:46,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:46" (3/3) ... [2021-08-26 03:34:46,888 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2021-08-26 03:34:46,892 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:34:46,892 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 03:34:46,926 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:34:46,932 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 [2021-08-26 03:34:46,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 03:34:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 20 states have (on average 1.7) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-08-26 03:34:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 03:34:46,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:46,946 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:46,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 89926881, now seen corresponding path program 1 times [2021-08-26 03:34:46,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:46,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209703924] [2021-08-26 03:34:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:46,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:47,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:47,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209703924] [2021-08-26 03:34:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209703924] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:34:47,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:34:47,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:34:47,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627683871] [2021-08-26 03:34:47,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:34:47,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:34:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:34:47,242 INFO L87 Difference]: Start difference. First operand has 23 states, 20 states have (on average 1.7) internal successors, (34), 22 states have internal predecessors, (34), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-08-26 03:34:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:47,316 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2021-08-26 03:34:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:34:47,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 03:34:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:47,323 INFO L225 Difference]: With dead ends: 44 [2021-08-26 03:34:47,323 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 03:34:47,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:34:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 03:34:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-26 03:34:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2021-08-26 03:34:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-08-26 03:34:47,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2021-08-26 03:34:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:47,350 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-08-26 03:34:47,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-08-26 03:34:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-08-26 03:34:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:34:47,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:47,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:47,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:34:47,352 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:47,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash 520543588, now seen corresponding path program 1 times [2021-08-26 03:34:47,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:47,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291324450] [2021-08-26 03:34:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:47,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:47,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:47,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291324450] [2021-08-26 03:34:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291324450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:34:47,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:34:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:34:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026857020] [2021-08-26 03:34:47,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:34:47,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:34:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:34:47,476 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:47,563 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-08-26 03:34:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:34:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 03:34:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:47,565 INFO L225 Difference]: With dead ends: 25 [2021-08-26 03:34:47,565 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 03:34:47,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:34:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 03:34:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-26 03:34:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 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) [2021-08-26 03:34:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-26 03:34:47,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2021-08-26 03:34:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:47,576 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-26 03:34:47,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:34:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-26 03:34:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 03:34:47,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:47,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:47,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:34:47,578 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2027175698, now seen corresponding path program 1 times [2021-08-26 03:34:47,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:47,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905149790] [2021-08-26 03:34:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:47,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:47,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:47,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905149790] [2021-08-26 03:34:47,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905149790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:47,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593320136] [2021-08-26 03:34:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:47,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:34:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:47,793 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) [2021-08-26 03:34:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:34:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 03:34:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:34:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593320136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:48,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:34:48,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-26 03:34:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317979033] [2021-08-26 03:34:48,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:34:48,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:34:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:34:48,272 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-26 03:34:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:48,553 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-08-26 03:34:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 03:34:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) Word has length 21 [2021-08-26 03:34:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:48,556 INFO L225 Difference]: With dead ends: 33 [2021-08-26 03:34:48,556 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 03:34:48,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:34:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 03:34:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-08-26 03:34:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 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) [2021-08-26 03:34:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-08-26 03:34:48,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2021-08-26 03:34:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:48,566 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-08-26 03:34:48,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2021-08-26 03:34:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-08-26 03:34:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 03:34:48,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:34:48,568 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:34:48,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:34:48,784 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 [2021-08-26 03:34:48,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:34:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:34:48,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1244584384, now seen corresponding path program 2 times [2021-08-26 03:34:48,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:34:48,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087526433] [2021-08-26 03:34:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:34:48,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:34:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:34:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:34:48,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:34:48,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087526433] [2021-08-26 03:34:48,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087526433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:48,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347222673] [2021-08-26 03:34:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:34:48,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:34:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:34:48,933 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) [2021-08-26 03:34:48,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:34:48,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:34:48,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:34:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:34:49,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:34:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:34:49,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347222673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:34:49,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:34:49,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-26 03:34:49,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906429419] [2021-08-26 03:34:49,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 03:34:49,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:34:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 03:34:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:34:49,299 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2021-08-26 03:34:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:34:49,642 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-26 03:34:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:34:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 27 [2021-08-26 03:34:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:34:49,643 INFO L225 Difference]: With dead ends: 35 [2021-08-26 03:34:49,643 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:34:49,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=255, Invalid=867, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:34:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:34:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:34:49,645 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) [2021-08-26 03:34:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:34:49,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-08-26 03:34:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:34:49,646 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:34:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2021-08-26 03:34:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:34:49,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:34:49,649 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:34:49,649 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:34:49,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:34:49,852 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 [2021-08-26 03:34:49,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:34:49,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:49,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:49,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:49,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point L40(lines 25 56) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point L36(line 36) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:34:50,002 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:34:50,003 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:34:50,003 INFO L857 garLoopResultBuilder]: For program point L49-2(lines 49 53) no Hoare annotation was computed. [2021-08-26 03:34:50,003 INFO L853 garLoopResultBuilder]: At program point L49-3(lines 49 53) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~leader_len~0)) (.cse1 (+ ULTIMATE.start_main_~p~0 (* 2 ULTIMATE.start_main_~ielen~0))) (.cse2 (<= 1 ULTIMATE.start_main_~p~0))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= .cse1 ULTIMATE.start_main_~bufsize_0~0) .cse2 (<= (+ ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~bufsize~0) ULTIMATE.start_main_~bufsize_0~0)) (and .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= .cse1 (+ (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~bufsize_0~0)) .cse2))) [2021-08-26 03:34:50,003 INFO L857 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-08-26 03:34:50,003 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:34:50,003 INFO L860 garLoopResultBuilder]: At program point L54(lines 25 56) the Hoare annotation is: true [2021-08-26 03:34:50,003 INFO L857 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L38-1(lines 25 56) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (and (<= (+ ULTIMATE.start_main_~p~0 2) ULTIMATE.start_main_~bufsize_0~0) (<= 1 ULTIMATE.start_main_~leader_len~0) (<= (+ ULTIMATE.start_main_~p~0 (* 2 ULTIMATE.start_main_~ielen~0)) (+ (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~bufsize_0~0)) (<= 1 ULTIMATE.start_main_~p~0) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L47(lines 47 48) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L853 garLoopResultBuilder]: At program point L18-5(lines 17 22) the Hoare annotation is: (and (<= (+ ULTIMATE.start_main_~p~0 2) ULTIMATE.start_main_~bufsize_0~0) (<= 1 ULTIMATE.start_main_~leader_len~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= (+ ULTIMATE.start_main_~p~0 (* 2 ULTIMATE.start_main_~ielen~0)) (+ (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~bufsize_0~0)) (<= 1 ULTIMATE.start_main_~p~0)) [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L39(lines 25 56) no Hoare annotation was computed. [2021-08-26 03:34:50,004 INFO L857 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-08-26 03:34:50,008 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:34:50,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:34:50 BoogieIcfgContainer [2021-08-26 03:34:50,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:34:50,020 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:34:50,020 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:34:50,021 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:34:50,021 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:46" (3/4) ... [2021-08-26 03:34:50,023 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:34:50,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 03:34:50,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:34:50,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:34:50,031 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:34:50,061 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:34:50,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:34:50,063 INFO L168 Benchmark]: Toolchain (without parser) took 3854.98 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 31.8 MB in the beginning and 28.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:50,063 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:50,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.38 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 50.8 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:50,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.19 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 49.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:50,064 INFO L168 Benchmark]: Boogie Preprocessor took 39.03 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.4 MB in the end (delta: 939.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:34:50,064 INFO L168 Benchmark]: RCFGBuilder took 310.08 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 49.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:50,065 INFO L168 Benchmark]: TraceAbstraction took 3136.13 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 49.3 MB in the beginning and 31.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:50,065 INFO L168 Benchmark]: Witness Printer took 41.22 ms. Allocated memory is still 81.8 MB. Free memory was 31.1 MB in the beginning and 28.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:34:50,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.38 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 50.8 MB in the end (delta: -19.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.19 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 49.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.03 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.4 MB in the end (delta: 939.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.08 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 49.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3136.13 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 49.3 MB in the beginning and 31.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. * Witness Printer took 41.22 ms. Allocated memory is still 81.8 MB. Free memory was 31.1 MB in the beginning and 28.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: 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, 23 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3082.9ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 9.3ms, AutomataDifference: 819.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 148.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 67 SDtfs, 86 SDslu, 213 SDs, 0 SdLazy, 231 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 210.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 767.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 20 NumberOfFragments, 98 HoareAnnotationTreeSize, 4 FomulaSimplifications, 283 FormulaSimplificationTreeSizeReduction, 36.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 349 FormulaSimplificationTreeSizeReductionInter, 106.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 38.9ms SsaConstructionTime, 177.9ms SatisfiabilityAnalysisTime, 1170.4ms InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 633 SizeOfPredicates, 14 NumberOfNonLiveVariables, 182 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((1 <= leader_len && i == 0) && p + 2 * ielen <= bufsize_0) && 1 <= p) && p + bufsize <= bufsize_0) || (((1 <= leader_len && 1 <= cond) && p + 2 * ielen <= 2 * i + bufsize_0) && 1 <= p) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((p + 2 <= bufsize_0 && 1 <= leader_len) && p + 2 * ielen <= 2 * i + bufsize_0) && 1 <= p) && !(0 == cond) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((p + 2 <= bufsize_0 && 1 <= leader_len) && 1 <= cond) && p + 2 * ielen <= 2 * i + bufsize_0) && 1 <= p RESULT: Ultimate proved your program to be correct! [2021-08-26 03:34:50,104 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...