./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/loops/sum01_bug02.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 3ebd5f9cdc53e2fed65e094e0a8b688f7bb2226007ad46e7ae7df20c2e5d5f11 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:57:44,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:57:44,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:57:44,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:57:44,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:57:44,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:57:44,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:57:44,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:57:44,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:57:44,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:57:44,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:57:44,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:57:44,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:57:44,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:57:44,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:57:44,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:57:44,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:57:44,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:57:44,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:57:44,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:57:44,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:57:44,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:57:44,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:57:44,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:57:44,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:57:44,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:57:44,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:57:44,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:57:44,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:57:44,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:57:44,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:57:44,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:57:44,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:57:44,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:57:44,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:57:44,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:57:44,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:57:44,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:57:44,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:57:44,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:57:44,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:57:44,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:57:44,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:57:44,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:57:44,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:57:44,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:57:44,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:57:44,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:57:44,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:57:44,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:57:44,981 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:57:44,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:57:44,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:57:44,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:57:44,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:57:44,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:57:44,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:57:44,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:57:44,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:57:44,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:57:44,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:57:44,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:57:44,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:57:44,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:57:44,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:57:44,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:57:44,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:57:44,992 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:57:44,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:57:44,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:57:44,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ebd5f9cdc53e2fed65e094e0a8b688f7bb2226007ad46e7ae7df20c2e5d5f11 [2021-12-27 23:57:45,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:57:45,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:57:45,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:57:45,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:57:45,288 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:57:45,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2021-12-27 23:57:45,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6a15e58/e20f7eeee6994275aab6b2abcc77c4fc/FLAG9e5d37817 [2021-12-27 23:57:45,760 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:57:45,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2021-12-27 23:57:45,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6a15e58/e20f7eeee6994275aab6b2abcc77c4fc/FLAG9e5d37817 [2021-12-27 23:57:46,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce6a15e58/e20f7eeee6994275aab6b2abcc77c4fc [2021-12-27 23:57:46,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:57:46,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:57:46,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:57:46,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:57:46,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:57:46,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311b15d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46, skipping insertion in model container [2021-12-27 23:57:46,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:57:46,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:57:46,293 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-12-27 23:57:46,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:57:46,308 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:57:46,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-12-27 23:57:46,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:57:46,332 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:57:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46 WrapperNode [2021-12-27 23:57:46,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:57:46,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:57:46,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:57:46,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:57:46,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,371 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-27 23:57:46,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:57:46,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:57:46,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:57:46,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:57:46,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:57:46,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:57:46,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:57:46,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:57:46,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (1/1) ... [2021-12-27 23:57:46,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:57:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:46,428 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) [2021-12-27 23:57:46,450 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 [2021-12-27 23:57:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:57:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:57:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:57:46,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:57:46,525 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:57:46,527 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:57:46,654 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:57:46,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:57:46,659 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:57:46,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:57:46 BoogieIcfgContainer [2021-12-27 23:57:46,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:57:46,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:57:46,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:57:46,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:57:46,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:57:46" (1/3) ... [2021-12-27 23:57:46,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e280fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:57:46, skipping insertion in model container [2021-12-27 23:57:46,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:57:46" (2/3) ... [2021-12-27 23:57:46,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e280fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:57:46, skipping insertion in model container [2021-12-27 23:57:46,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:57:46" (3/3) ... [2021-12-27 23:57:46,667 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-12-27 23:57:46,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:57:46,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:57:46,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:57:46,727 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-27 23:57:46,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:57:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-27 23:57:46,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:46,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-27 23:57:46,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2021-12-27 23:57:46,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778167921] [2021-12-27 23:57:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:46,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778167921] [2021-12-27 23:57:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778167921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:57:46,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:57:46,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:57:46,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587903946] [2021-12-27 23:57:46,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:57:46,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:57:46,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:57:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:57:46,992 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-27 23:57:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:47,006 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-12-27 23:57:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:57:47,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-12-27 23:57:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:47,022 INFO L225 Difference]: With dead ends: 22 [2021-12-27 23:57:47,022 INFO L226 Difference]: Without dead ends: 10 [2021-12-27 23:57:47,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:57:47,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:47,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:57:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-27 23:57:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-27 23:57:47,056 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) [2021-12-27 23:57:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-27 23:57:47,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-27 23:57:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-27 23:57:47,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-12-27 23:57:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-27 23:57:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-27 23:57:47,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:47,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-27 23:57:47,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:57:47,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash 889611988, now seen corresponding path program 1 times [2021-12-27 23:57:47,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130149949] [2021-12-27 23:57:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:47,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:47,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130149949] [2021-12-27 23:57:47,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130149949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:57:47,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:57:47,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:57:47,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068139479] [2021-12-27 23:57:47,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:57:47,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:57:47,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:57:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:57:47,176 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-12-27 23:57:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:47,207 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-12-27 23:57:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:57:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-12-27 23:57:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:47,208 INFO L225 Difference]: With dead ends: 18 [2021-12-27 23:57:47,208 INFO L226 Difference]: Without dead ends: 14 [2021-12-27 23:57:47,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:57:47,210 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:47,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:57:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-27 23:57:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-27 23:57:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-12-27 23:57:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-27 23:57:47,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-12-27 23:57:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-27 23:57:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-12-27 23:57:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-27 23:57:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 23:57:47,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:47,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:47,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:57:47,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1711509127, now seen corresponding path program 1 times [2021-12-27 23:57:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:47,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452969320] [2021-12-27 23:57:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:47,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:47,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:47,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452969320] [2021-12-27 23:57:47,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452969320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:47,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322257779] [2021-12-27 23:57:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:47,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:47,417 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) [2021-12-27 23:57:47,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:57:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 23:57:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:47,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:47,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322257779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:47,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:47,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-27 23:57:47,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500131663] [2021-12-27 23:57:47,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:47,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 23:57:47,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 23:57:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-27 23:57:47,797 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-12-27 23:57:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:48,064 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-27 23:57:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 23:57:48,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 [2021-12-27 23:57:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:48,066 INFO L225 Difference]: With dead ends: 35 [2021-12-27 23:57:48,067 INFO L226 Difference]: Without dead ends: 29 [2021-12-27 23:57:48,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-27 23:57:48,071 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:48,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:57:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-27 23:57:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-12-27 23:57:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:57:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-27 23:57:48,080 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2021-12-27 23:57:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:48,081 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-27 23:57:48,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-12-27 23:57:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-27 23:57:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-27 23:57:48,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:48,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:48,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 23:57:48,295 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 [2021-12-27 23:57:48,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1816192992, now seen corresponding path program 1 times [2021-12-27 23:57:48,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873002454] [2021-12-27 23:57:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:48,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:48,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873002454] [2021-12-27 23:57:48,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873002454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:48,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029817824] [2021-12-27 23:57:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:48,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:48,349 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) [2021-12-27 23:57:48,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:57:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:48,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-27 23:57:48,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:48,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029817824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:48,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:48,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-27 23:57:48,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130173511] [2021-12-27 23:57:48,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:48,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 23:57:48,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 23:57:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-12-27 23:57:48,511 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2021-12-27 23:57:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:48,550 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-27 23:57:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 23:57:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 14 [2021-12-27 23:57:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:48,551 INFO L225 Difference]: With dead ends: 35 [2021-12-27 23:57:48,551 INFO L226 Difference]: Without dead ends: 23 [2021-12-27 23:57:48,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-12-27 23:57:48,552 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:48,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:57:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-27 23:57:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-12-27 23:57:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-12-27 23:57:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-27 23:57:48,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-12-27 23:57:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:48,557 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-27 23:57:48,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2021-12-27 23:57:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-27 23:57:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 23:57:48,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:48,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:48,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 23:57:48,771 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 [2021-12-27 23:57:48,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1968846659, now seen corresponding path program 2 times [2021-12-27 23:57:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624189613] [2021-12-27 23:57:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:48,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:57:48,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:48,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624189613] [2021-12-27 23:57:48,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624189613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:48,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516535698] [2021-12-27 23:57:48,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:57:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:48,952 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) [2021-12-27 23:57:48,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 23:57:48,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:57:48,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:57:48,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-27 23:57:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:49,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:49,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516535698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:49,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:49,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2021-12-27 23:57:49,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185565256] [2021-12-27 23:57:49,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:49,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-27 23:57:49,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-27 23:57:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-12-27 23:57:49,616 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2021-12-27 23:57:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:50,053 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-27 23:57:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-27 23:57:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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 18 [2021-12-27 23:57:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:50,055 INFO L225 Difference]: With dead ends: 40 [2021-12-27 23:57:50,055 INFO L226 Difference]: Without dead ends: 34 [2021-12-27 23:57:50,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2021-12-27 23:57:50,056 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:50,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 98 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:57:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-27 23:57:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-12-27 23:57:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-12-27 23:57:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-27 23:57:50,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-12-27 23:57:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-27 23:57:50,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 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) [2021-12-27 23:57:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-27 23:57:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 23:57:50,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:50,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:50,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 23:57:50,262 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 [2021-12-27 23:57:50,263 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1540417770, now seen corresponding path program 2 times [2021-12-27 23:57:50,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:50,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187847946] [2021-12-27 23:57:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:50,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:57:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:50,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:57:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187847946] [2021-12-27 23:57:50,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187847946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:57:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199341250] [2021-12-27 23:57:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:57:50,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:57:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:57:50,341 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) [2021-12-27 23:57:50,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 23:57:50,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:57:50,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:57:50,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-27 23:57:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:57:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:57:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:57:50,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199341250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:57:50,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:57:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-27 23:57:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074277568] [2021-12-27 23:57:50,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:57:50,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 23:57:50,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:57:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 23:57:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=164, Unknown=0, NotChecked=0, Total=306 [2021-12-27 23:57:50,600 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-12-27 23:57:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:57:50,642 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-27 23:57:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-27 23:57:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 22 [2021-12-27 23:57:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:57:50,650 INFO L225 Difference]: With dead ends: 41 [2021-12-27 23:57:50,650 INFO L226 Difference]: Without dead ends: 33 [2021-12-27 23:57:50,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=164, Unknown=0, NotChecked=0, Total=306 [2021-12-27 23:57:50,654 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:57:50,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:57:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-27 23:57:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-27 23:57:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2021-12-27 23:57:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-27 23:57:50,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 22 [2021-12-27 23:57:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:57:50,660 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-27 23:57:50,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-12-27 23:57:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-27 23:57:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-27 23:57:50,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:57:50,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:57:50,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 23:57:50,863 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 [2021-12-27 23:57:50,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:57:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:57:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 454184884, now seen corresponding path program 3 times [2021-12-27 23:57:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:57:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877845147] [2021-12-27 23:57:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:57:50,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:57:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:57:50,889 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:57:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:57:50,918 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:57:50,918 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:57:50,919 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:57:50,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 23:57:50,923 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2021-12-27 23:57:50,925 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:57:50,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:57:50 BoogieIcfgContainer [2021-12-27 23:57:50,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:57:50,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:57:50,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:57:50,948 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:57:50,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:57:46" (3/4) ... [2021-12-27 23:57:50,951 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-27 23:57:51,008 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 23:57:51,008 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:57:51,009 INFO L158 Benchmark]: Toolchain (without parser) took 4837.41ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 35.6MB in the beginning and 48.9MB in the end (delta: -13.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,009 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:57:51,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.18ms. Allocated memory is still 56.6MB. Free memory was 35.5MB in the beginning and 25.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.39ms. Allocated memory is still 56.6MB. Free memory was 25.9MB in the beginning and 39.9MB in the end (delta: -14.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,010 INFO L158 Benchmark]: Boogie Preprocessor took 28.01ms. Allocated memory is still 56.6MB. Free memory was 39.9MB in the beginning and 38.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:57:51,010 INFO L158 Benchmark]: RCFGBuilder took 258.74ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 30.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,010 INFO L158 Benchmark]: TraceAbstraction took 4285.74ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 29.4MB in the beginning and 51.5MB in the end (delta: -22.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,010 INFO L158 Benchmark]: Witness Printer took 60.35ms. Allocated memory is still 88.1MB. Free memory was 51.5MB in the beginning and 48.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:57:51,012 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 56.6MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 159.18ms. Allocated memory is still 56.6MB. Free memory was 35.5MB in the beginning and 25.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.39ms. Allocated memory is still 56.6MB. Free memory was 25.9MB in the beginning and 39.9MB in the end (delta: -14.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.01ms. Allocated memory is still 56.6MB. Free memory was 39.9MB in the beginning and 38.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 258.74ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 30.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4285.74ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 29.4MB in the beginning and 51.5MB in the end (delta: -22.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Witness Printer took 60.35ms. Allocated memory is still 88.1MB. Free memory was 51.5MB in the beginning and 48.9MB in the end (delta: 2.6MB). 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, j=10, n=0, n=6] [L24] COND TRUE i<=n VAL [i=1, j=10, n=0, n=6] [L25] COND TRUE i