./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/recursive-simple/id_i15_o15-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:27:10,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:27:10,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:27:10,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:27:10,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:27:10,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:27:10,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:27:10,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:27:10,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:27:10,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:27:10,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:27:10,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:27:10,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:27:10,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:27:10,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:27:10,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:27:10,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:27:10,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:27:10,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:27:10,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:27:10,736 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:27:10,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:27:10,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:27:10,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:27:10,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:27:10,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:27:10,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:27:10,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:27:10,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:27:10,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:27:10,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:27:10,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:27:10,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:27:10,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:27:10,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:27:10,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:27:10,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:27:10,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:27:10,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:27:10,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:27:10,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:27:10,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:27:10,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:27:10,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:27:10,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:27:10,774 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:27:10,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:27:10,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:27:10,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:27:10,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:27:10,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:27:10,776 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:27:10,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:27:10,776 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:27:10,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:27:10,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:27:10,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:27:10,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:27:10,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:27:10,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:27:10,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:27:10,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:27:10,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:27:10,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:27:10,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:27:10,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 [2022-07-12 06:27:10,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:27:11,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:27:11,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:27:11,005 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:27:11,006 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:27:11,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2022-07-12 06:27:11,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9936565/5dd2cb43d7b543719f62b8838c34e616/FLAGa0054bbbd [2022-07-12 06:27:11,393 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:27:11,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2022-07-12 06:27:11,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9936565/5dd2cb43d7b543719f62b8838c34e616/FLAGa0054bbbd [2022-07-12 06:27:11,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d9936565/5dd2cb43d7b543719f62b8838c34e616 [2022-07-12 06:27:11,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:27:11,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:27:11,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:27:11,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:27:11,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:27:11,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712d0799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11, skipping insertion in model container [2022-07-12 06:27:11,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:27:11,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:27:11,578 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/recursive-simple/id_i15_o15-2.c[454,467] [2022-07-12 06:27:11,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:27:11,585 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:27:11,593 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/recursive-simple/id_i15_o15-2.c[454,467] [2022-07-12 06:27:11,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:27:11,602 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:27:11,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11 WrapperNode [2022-07-12 06:27:11,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:27:11,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:27:11,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:27:11,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:27:11,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,621 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-12 06:27:11,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:27:11,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:27:11,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:27:11,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:27:11,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:27:11,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:27:11,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:27:11,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:27:11,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (1/1) ... [2022-07-12 06:27:11,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:27:11,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:11,680 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) [2022-07-12 06:27:11,723 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 [2022-07-12 06:27:11,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:27:11,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:27:11,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:27:11,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:27:11,748 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-12 06:27:11,748 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-12 06:27:11,785 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:27:11,786 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:27:11,860 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:27:11,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:27:11,865 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:27:11,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:27:11 BoogieIcfgContainer [2022-07-12 06:27:11,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:27:11,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:27:11,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:27:11,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:27:11,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:27:11" (1/3) ... [2022-07-12 06:27:11,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0510ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:27:11, skipping insertion in model container [2022-07-12 06:27:11,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:11" (2/3) ... [2022-07-12 06:27:11,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0510ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:27:11, skipping insertion in model container [2022-07-12 06:27:11,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:27:11" (3/3) ... [2022-07-12 06:27:11,879 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2022-07-12 06:27:11,892 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:27:11,893 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:27:11,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:27:11,938 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a4b545e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@309aee9f [2022-07-12 06:27:11,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:27:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:27:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 06:27:11,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:11,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:11,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-12 06:27:11,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635603448] [2022-07-12 06:27:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:27:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635603448] [2022-07-12 06:27:12,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635603448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:27:12,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:27:12,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:27:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382427819] [2022-07-12 06:27:12,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:27:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:27:12,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:27:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:27:12,231 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:27:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:12,279 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-12 06:27:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:27:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-12 06:27:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:12,289 INFO L225 Difference]: With dead ends: 25 [2022-07-12 06:27:12,290 INFO L226 Difference]: Without dead ends: 15 [2022-07-12 06:27:12,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:27:12,296 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:12,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:27:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-12 06:27:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-12 06:27:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 06:27:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-12 06:27:12,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-12 06:27:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-12 06:27:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:27:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-12 06:27:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 06:27:12,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:12,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:27:12,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-12 06:27:12,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884592864] [2022-07-12 06:27:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:12,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:27:12,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884592864] [2022-07-12 06:27:12,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884592864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:27:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958833021] [2022-07-12 06:27:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:12,431 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) [2022-07-12 06:27:12,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:27:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 06:27:12,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:27:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:27:12,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:27:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:27:12,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958833021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:27:12,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:27:12,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2022-07-12 06:27:12,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153002253] [2022-07-12 06:27:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:27:12,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 06:27:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 06:27:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-12 06:27:12,701 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 06:27:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:12,731 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-12 06:27:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 06:27:12,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 16 [2022-07-12 06:27:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:12,732 INFO L225 Difference]: With dead ends: 22 [2022-07-12 06:27:12,732 INFO L226 Difference]: Without dead ends: 18 [2022-07-12 06:27:12,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-12 06:27:12,734 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:12,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:27:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-12 06:27:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-12 06:27:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 06:27:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-12 06:27:12,738 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-12 06:27:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:12,738 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-12 06:27:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 06:27:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-12 06:27:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 06:27:12,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:12,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:12,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 06:27:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:12,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-07-12 06:27:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247855672] [2022-07-12 06:27:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:12,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:27:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247855672] [2022-07-12 06:27:13,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247855672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:27:13,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369763645] [2022-07-12 06:27:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:27:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:13,109 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) [2022-07-12 06:27:13,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:27:13,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:27:13,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:27:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 06:27:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:27:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:27:13,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:27:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:27:13,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369763645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:27:13,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:27:13,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-07-12 06:27:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939240220] [2022-07-12 06:27:13,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:27:13,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 06:27:13,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 06:27:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 06:27:13,450 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-12 06:27:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:13,497 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-12 06:27:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:27:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-07-12 06:27:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:13,500 INFO L225 Difference]: With dead ends: 25 [2022-07-12 06:27:13,500 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 06:27:13,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-07-12 06:27:13,502 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:13,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 51 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:27:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 06:27:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-12 06:27:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 06:27:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-12 06:27:13,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-07-12 06:27:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:13,506 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-12 06:27:13,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-12 06:27:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-12 06:27:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 06:27:13,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:13,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:13,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:27:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 06:27:13,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-07-12 06:27:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412571302] [2022-07-12 06:27:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:27:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412571302] [2022-07-12 06:27:13,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412571302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:27:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788705682] [2022-07-12 06:27:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:27:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:13,857 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) [2022-07-12 06:27:13,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:27:13,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:27:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:27:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 06:27:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:27:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:27:13,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:27:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:27:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788705682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:27:14,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:27:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2022-07-12 06:27:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291708067] [2022-07-12 06:27:14,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:27:14,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 06:27:14,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 06:27:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-12 06:27:14,321 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 06:27:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:14,523 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-12 06:27:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:27:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2022-07-12 06:27:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:14,524 INFO L225 Difference]: With dead ends: 39 [2022-07-12 06:27:14,524 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 06:27:14,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 06:27:14,526 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:14,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:27:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 06:27:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 06:27:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 06:27:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-12 06:27:14,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-07-12 06:27:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:14,531 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-12 06:27:14,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 06:27:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-12 06:27:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 06:27:14,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:14,532 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:14,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 06:27:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:14,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2022-07-12 06:27:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:14,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926220950] [2022-07-12 06:27:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 06:27:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926220950] [2022-07-12 06:27:15,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926220950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:27:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19317897] [2022-07-12 06:27:15,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:27:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:15,016 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) [2022-07-12 06:27:15,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:27:15,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:27:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:27:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 06:27:15,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:27:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 06:27:15,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:27:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 06:27:16,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19317897] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:27:16,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:27:16,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 24 [2022-07-12 06:27:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942733856] [2022-07-12 06:27:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:27:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 06:27:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 06:27:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-07-12 06:27:16,754 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-12 06:27:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:16,869 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-12 06:27:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 06:27:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) Word has length 52 [2022-07-12 06:27:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:16,871 INFO L225 Difference]: With dead ends: 40 [2022-07-12 06:27:16,871 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 06:27:16,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2022-07-12 06:27:16,872 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:16,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 72 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:27:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 06:27:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 06:27:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-12 06:27:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-12 06:27:16,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-07-12 06:27:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:16,877 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-12 06:27:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-12 06:27:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-12 06:27:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 06:27:16,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:16,878 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:16,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 06:27:17,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:17,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2022-07-12 06:27:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833913027] [2022-07-12 06:27:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:27:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:27:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 06:27:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:27:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833913027] [2022-07-12 06:27:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833913027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:27:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187384855] [2022-07-12 06:27:17,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:27:17,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:27:17,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:27:17,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:27:17,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-12 06:27:17,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:27:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 06:27:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:27:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 06:27:17,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:27:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 06:27:19,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187384855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:27:19,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:27:19,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 46 [2022-07-12 06:27:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996598029] [2022-07-12 06:27:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:27:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 06:27:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:27:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 06:27:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 06:27:19,419 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) [2022-07-12 06:27:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:27:19,941 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-07-12 06:27:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 06:27:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) Word has length 58 [2022-07-12 06:27:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:27:19,948 INFO L225 Difference]: With dead ends: 63 [2022-07-12 06:27:19,948 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 06:27:19,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=920, Invalid=4932, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 06:27:19,952 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:27:19,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:27:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 06:27:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 06:27:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-12 06:27:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-12 06:27:19,958 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 58 [2022-07-12 06:27:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:27:19,958 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-12 06:27:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) [2022-07-12 06:27:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-12 06:27:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 06:27:19,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:27:19,961 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:27:19,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:27:20,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:27:20,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:27:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:27:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 6 times [2022-07-12 06:27:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:27:20,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416371032] [2022-07-12 06:27:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:27:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:27:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 06:27:20,191 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 06:27:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 06:27:20,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 06:27:20,221 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 06:27:20,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 06:27:20,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 06:27:20,225 INFO L356 BasicCegarLoop]: Path program histogram: [6, 1] [2022-07-12 06:27:20,228 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 06:27:20,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:27:20 BoogieIcfgContainer [2022-07-12 06:27:20,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 06:27:20,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 06:27:20,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 06:27:20,272 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 06:27:20,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:27:11" (3/4) ... [2022-07-12 06:27:20,274 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 06:27:20,303 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 06:27:20,303 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 06:27:20,304 INFO L158 Benchmark]: Toolchain (without parser) took 8886.93ms. Allocated memory was 86.0MB in the beginning and 127.9MB in the end (delta: 41.9MB). Free memory was 48.9MB in the beginning and 33.9MB in the end (delta: 14.9MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,304 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 86.0MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:27:20,304 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.37ms. Allocated memory is still 86.0MB. Free memory was 48.6MB in the beginning and 61.8MB in the end (delta: -13.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,304 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.00ms. Allocated memory is still 86.0MB. Free memory was 61.8MB in the beginning and 60.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,305 INFO L158 Benchmark]: Boogie Preprocessor took 16.13ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 59.6MB in the end (delta: 926.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:27:20,305 INFO L158 Benchmark]: RCFGBuilder took 226.61ms. Allocated memory is still 86.0MB. Free memory was 59.6MB in the beginning and 51.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,305 INFO L158 Benchmark]: TraceAbstraction took 8403.44ms. Allocated memory was 86.0MB in the beginning and 127.9MB in the end (delta: 41.9MB). Free memory was 50.9MB in the beginning and 37.1MB in the end (delta: 13.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,305 INFO L158 Benchmark]: Witness Printer took 32.15ms. Allocated memory is still 127.9MB. Free memory was 37.1MB in the beginning and 33.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 06:27:20,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 86.0MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.37ms. Allocated memory is still 86.0MB. Free memory was 48.6MB in the beginning and 61.8MB in the end (delta: -13.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.00ms. Allocated memory is still 86.0MB. Free memory was 61.8MB in the beginning and 60.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.13ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 59.6MB in the end (delta: 926.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 226.61ms. Allocated memory is still 86.0MB. Free memory was 59.6MB in the beginning and 51.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8403.44ms. Allocated memory was 86.0MB in the beginning and 127.9MB in the end (delta: 41.9MB). Free memory was 50.9MB in the beginning and 37.1MB in the end (delta: 13.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. * Witness Printer took 32.15ms. Allocated memory is still 127.9MB. Free memory was 37.1MB in the beginning and 33.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 15; VAL [input=15] [L13] CALL, EXPR id(input) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=15, input=15] [L13] int result = id(input); [L14] COND TRUE result == 15 VAL [input=15, result=15] [L15] reach_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 7, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 273 mSDsluCounter, 361 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 302 mSDsCounter, 129 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 385 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 129 mSolverCounterUnsat, 59 mSDtfsCounter, 385 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 501 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 462 NumberOfCodeBlocks, 462 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1289 SizeOfPredicates, 13 NumberOfNonLiveVariables, 529 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 549/1206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-12 06:27:20,346 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE