./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/reducercommutativity/sum20-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:22:55,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:22:55,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:22:55,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:22:55,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:22:55,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:22:55,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:22:55,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:22:55,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:22:55,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:22:55,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:22:55,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:22:55,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:22:55,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:22:55,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:22:55,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:22:55,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:22:55,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:22:55,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:22:55,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:22:55,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:22:55,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:22:55,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:22:55,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:22:55,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:22:55,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:22:55,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:22:55,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:22:55,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:22:55,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:22:55,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:22:55,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:22:55,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:22:55,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:22:55,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:22:55,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:22:55,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:22:55,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:22:55,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:22:55,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:22:55,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:22:55,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:22:55,315 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:22:55,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:22:55,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:22:55,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:22:55,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:22:55,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:22:55,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:22:55,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:22:55,318 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:22:55,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:22:55,318 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:22:55,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:22:55,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:22:55,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:22:55,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:55,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:22:55,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:22:55,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:22:55,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:22:55,322 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c2f5d73c406c3ffc9c27d7cd89dbe0ce5d7ec9b20c32fdf36fe2abec0cffd86 [2023-02-15 18:22:55,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:22:55,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:22:55,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:22:55,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:22:55,520 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:22:55,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum20-2.i [2023-02-15 18:22:56,477 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:22:56,617 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:22:56,617 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum20-2.i [2023-02-15 18:22:56,621 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aca6f363/1e285de69a7749cd95fa8194994d5d61/FLAGb6ca43574 [2023-02-15 18:22:56,631 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aca6f363/1e285de69a7749cd95fa8194994d5d61 [2023-02-15 18:22:56,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:22:56,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:22:56,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:56,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:22:56,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:22:56,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ef8a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56, skipping insertion in model container [2023-02-15 18:22:56,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:22:56,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:22:56,753 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum20-2.i[1277,1290] [2023-02-15 18:22:56,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:56,762 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:22:56,775 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum20-2.i[1277,1290] [2023-02-15 18:22:56,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:22:56,785 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:22:56,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56 WrapperNode [2023-02-15 18:22:56,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:22:56,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:56,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:22:56,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:22:56,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,809 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 18:22:56,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:22:56,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:22:56,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:22:56,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:22:56,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:22:56,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:22:56,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:22:56,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:22:56,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (1/1) ... [2023-02-15 18:22:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:22:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:56,854 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) [2023-02-15 18:22:56,856 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 [2023-02-15 18:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-02-15 18:22:56,884 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-02-15 18:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:22:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:22:56,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:22:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:22:56,929 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:22:56,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:22:57,025 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:22:57,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:22:57,029 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:22:57,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:57 BoogieIcfgContainer [2023-02-15 18:22:57,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:22:57,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:22:57,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:22:57,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:22:57,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:22:56" (1/3) ... [2023-02-15 18:22:57,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4567d49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:57, skipping insertion in model container [2023-02-15 18:22:57,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:22:56" (2/3) ... [2023-02-15 18:22:57,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4567d49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:22:57, skipping insertion in model container [2023-02-15 18:22:57,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:22:57" (3/3) ... [2023-02-15 18:22:57,036 INFO L112 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2023-02-15 18:22:57,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:22:57,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:22:57,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:22:57,087 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@29ee9c00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:22:57,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:22:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:22:57,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:57,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:57,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2023-02-15 18:22:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418419653] [2023-02-15 18:22:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:57,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 18:22:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:57,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 18:22:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:57,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 18:22:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 18:22:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418419653] [2023-02-15 18:22:57,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418419653] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868125258] [2023-02-15 18:22:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:57,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:57,501 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) [2023-02-15 18:22:57,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:22:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:57,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:57,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868125258] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:57,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:57,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 18:22:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90806394] [2023-02-15 18:22:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:57,728 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:57,757 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-15 18:22:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 18:22:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:57,764 INFO L225 Difference]: With dead ends: 50 [2023-02-15 18:22:57,764 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 18:22:57,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:57,768 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:57,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 18:22:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-15 18:22:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 18:22:57,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-15 18:22:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:57,822 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 18:22:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 18:22:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 18:22:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 18:22:57,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:57,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:57,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:58,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 18:22:58,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2023-02-15 18:22:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148782625] [2023-02-15 18:22:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 18:22:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 18:22:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 18:22:58,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148782625] [2023-02-15 18:22:58,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148782625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962625904] [2023-02-15 18:22:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:58,135 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) [2023-02-15 18:22:58,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:22:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 18:22:58,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:58,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962625904] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:58,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:58,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 18:22:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821358425] [2023-02-15 18:22:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:58,195 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:58,202 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-15 18:22:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:58,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-15 18:22:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:58,203 INFO L225 Difference]: With dead ends: 42 [2023-02-15 18:22:58,203 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 18:22:58,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:22:58,205 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:58,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 18:22:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 18:22:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 18:22:58,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-02-15 18:22:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:58,209 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 18:22:58,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 18:22:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 18:22:58,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:58,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:58,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:58,414 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,SelfDestructingSolverStorable1 [2023-02-15 18:22:58,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2023-02-15 18:22:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916401420] [2023-02-15 18:22:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-15 18:22:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 18:22:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:22:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916401420] [2023-02-15 18:22:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916401420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039684911] [2023-02-15 18:22:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:58,560 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) [2023-02-15 18:22:58,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:22:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:22:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 18:22:58,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:22:58,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039684911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:22:58,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:22:58,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-15 18:22:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901094956] [2023-02-15 18:22:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:22:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:22:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:22:58,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:22:58,666 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:58,678 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-15 18:22:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:22:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-02-15 18:22:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:58,679 INFO L225 Difference]: With dead ends: 39 [2023-02-15 18:22:58,680 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 18:22:58,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:22:58,681 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:58,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 18:22:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-15 18:22:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 18:22:58,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2023-02-15 18:22:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:58,686 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 18:22:58,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 18:22:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 18:22:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 18:22:58,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:58,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:58,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:58,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:58,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2023-02-15 18:22:58,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:58,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002351720] [2023-02-15 18:22:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 18:22:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-15 18:22:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 18:22:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 18:22:58,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:58,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002351720] [2023-02-15 18:22:58,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002351720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:58,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051522340] [2023-02-15 18:22:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:58,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:58,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:58,970 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) [2023-02-15 18:22:58,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:22:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:59,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:22:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 18:22:59,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 18:22:59,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051522340] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:59,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:59,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 18:22:59,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336685195] [2023-02-15 18:22:59,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:22:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:22:59,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:59,125 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:59,170 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-15 18:22:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:22:59,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2023-02-15 18:22:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:59,173 INFO L225 Difference]: With dead ends: 54 [2023-02-15 18:22:59,173 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 18:22:59,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:22:59,177 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:59,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 18:22:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-15 18:22:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 18:22:59,191 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2023-02-15 18:22:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:59,192 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 18:22:59,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:22:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 18:22:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 18:22:59,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:59,194 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:59,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:59,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2023-02-15 18:22:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485759615] [2023-02-15 18:22:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 18:22:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:59,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 18:22:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 18:22:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:22:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 18:22:59,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:22:59,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485759615] [2023-02-15 18:22:59,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485759615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:22:59,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903673026] [2023-02-15 18:22:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:22:59,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:59,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:22:59,561 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) [2023-02-15 18:22:59,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:22:59,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:22:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:22:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:22:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:22:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 18:22:59,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:22:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 18:22:59,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903673026] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:22:59,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:22:59,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 18:22:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534021264] [2023-02-15 18:22:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:22:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:22:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:22:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:22:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:59,731 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 18:22:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:22:59,761 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-15 18:22:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:22:59,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-02-15 18:22:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:22:59,762 INFO L225 Difference]: With dead ends: 70 [2023-02-15 18:22:59,762 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 18:22:59,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:22:59,763 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:22:59,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:22:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 18:22:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 18:22:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:22:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-15 18:22:59,767 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2023-02-15 18:22:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:22:59,768 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-15 18:22:59,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 18:22:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-15 18:22:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 18:22:59,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:22:59,769 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:22:59,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:22:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:22:59,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:22:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:22:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2023-02-15 18:22:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:22:59,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68942956] [2023-02-15 18:22:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:22:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:22:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 18:23:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-15 18:23:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-15 18:23:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-15 18:23:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68942956] [2023-02-15 18:23:00,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68942956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246854940] [2023-02-15 18:23:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:23:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:00,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:00,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:23:00,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:23:00,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:23:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 18:23:00,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 18:23:00,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246854940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:00,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-15 18:23:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122619117] [2023-02-15 18:23:00,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:00,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 18:23:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 18:23:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:23:00,300 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:00,350 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2023-02-15 18:23:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:23:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-02-15 18:23:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:00,351 INFO L225 Difference]: With dead ends: 82 [2023-02-15 18:23:00,351 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 18:23:00,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 18:23:00,352 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:00,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 18:23:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-15 18:23:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-02-15 18:23:00,357 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2023-02-15 18:23:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:00,357 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-02-15 18:23:00,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-02-15 18:23:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-15 18:23:00,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:00,359 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:00,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:00,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2023-02-15 18:23:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706459161] [2023-02-15 18:23:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 18:23:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 18:23:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-15 18:23:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-15 18:23:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706459161] [2023-02-15 18:23:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706459161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192801055] [2023-02-15 18:23:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:23:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:00,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:00,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:23:00,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:23:00,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:23:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-15 18:23:00,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-15 18:23:00,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192801055] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:00,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:00,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-02-15 18:23:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795400718] [2023-02-15 18:23:00,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 18:23:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 18:23:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-15 18:23:00,967 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:01,012 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-15 18:23:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 18:23:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2023-02-15 18:23:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:01,014 INFO L225 Difference]: With dead ends: 100 [2023-02-15 18:23:01,015 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 18:23:01,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-15 18:23:01,016 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:01,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 18:23:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-02-15 18:23:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-02-15 18:23:01,021 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2023-02-15 18:23:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:01,021 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-02-15 18:23:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-02-15 18:23:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 18:23:01,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:01,022 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:01,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 18:23:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:01,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2023-02-15 18:23:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:01,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417329414] [2023-02-15 18:23:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:01,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:01,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 18:23:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:01,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 18:23:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-15 18:23:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-15 18:23:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417329414] [2023-02-15 18:23:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417329414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776565326] [2023-02-15 18:23:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:23:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:01,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:01,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:01,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:23:01,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 18:23:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:23:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-02-15 18:23:01,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-15 18:23:02,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776565326] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:02,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:02,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-02-15 18:23:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330571718] [2023-02-15 18:23:02,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:02,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 18:23:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 18:23:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-15 18:23:02,104 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:02,163 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2023-02-15 18:23:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 18:23:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2023-02-15 18:23:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:02,164 INFO L225 Difference]: With dead ends: 126 [2023-02-15 18:23:02,164 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 18:23:02,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-15 18:23:02,165 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:02,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 18:23:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2023-02-15 18:23:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-02-15 18:23:02,170 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2023-02-15 18:23:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:02,171 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-02-15 18:23:02,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-02-15 18:23:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-15 18:23:02,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:02,172 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:02,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 18:23:02,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2023-02-15 18:23:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:02,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36696260] [2023-02-15 18:23:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:02,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 18:23:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-15 18:23:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-02-15 18:23:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-02-15 18:23:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36696260] [2023-02-15 18:23:02,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36696260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020915234] [2023-02-15 18:23:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:23:02,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:02,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:02,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:23:02,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-15 18:23:02,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:02,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:23:02,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2023-02-15 18:23:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2023-02-15 18:23:03,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020915234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:03,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:03,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-02-15 18:23:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917059044] [2023-02-15 18:23:03,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:03,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 18:23:03,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 18:23:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-15 18:23:03,191 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:03,249 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2023-02-15 18:23:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 18:23:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2023-02-15 18:23:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:03,251 INFO L225 Difference]: With dead ends: 160 [2023-02-15 18:23:03,251 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 18:23:03,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-15 18:23:03,254 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:03,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 18:23:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-02-15 18:23:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2023-02-15 18:23:03,269 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2023-02-15 18:23:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:03,270 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2023-02-15 18:23:03,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 18:23:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2023-02-15 18:23:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-15 18:23:03,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:03,271 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:03,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:03,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2023-02-15 18:23:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:03,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770767707] [2023-02-15 18:23:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:03,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 18:23:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-15 18:23:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:03,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-02-15 18:23:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-15 18:23:03,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770767707] [2023-02-15 18:23:03,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770767707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760950620] [2023-02-15 18:23:03,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:23:03,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:03,877 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:03,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:23:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 18:23:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-15 18:23:04,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-15 18:23:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760950620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:04,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:04,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-02-15 18:23:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313172869] [2023-02-15 18:23:04,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 18:23:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 18:23:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:23:04,207 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:23:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:04,245 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2023-02-15 18:23:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 18:23:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2023-02-15 18:23:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:04,248 INFO L225 Difference]: With dead ends: 187 [2023-02-15 18:23:04,248 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 18:23:04,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-15 18:23:04,249 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:04,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 18:23:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-15 18:23:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2023-02-15 18:23:04,259 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 168 [2023-02-15 18:23:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:04,259 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2023-02-15 18:23:04,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 18:23:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2023-02-15 18:23:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-15 18:23:04,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:04,261 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:04,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 18:23:04,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:04,468 INFO L85 PathProgramCache]: Analyzing trace with hash 28900907, now seen corresponding path program 8 times [2023-02-15 18:23:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:04,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442130221] [2023-02-15 18:23:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:04,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:23:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-15 18:23:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:04,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-02-15 18:23:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-02-15 18:23:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442130221] [2023-02-15 18:23:04,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442130221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885980583] [2023-02-15 18:23:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:23:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:04,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:04,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:04,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:23:04,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:23:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:04,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 18:23:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2023-02-15 18:23:05,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-02-15 18:23:05,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885980583] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:05,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:05,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-15 18:23:05,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490279499] [2023-02-15 18:23:05,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:05,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 18:23:05,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 18:23:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:23:05,184 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:05,221 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2023-02-15 18:23:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 18:23:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2023-02-15 18:23:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:05,222 INFO L225 Difference]: With dead ends: 198 [2023-02-15 18:23:05,222 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 18:23:05,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:23:05,223 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:05,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 18:23:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-15 18:23:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-02-15 18:23:05,226 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 180 [2023-02-15 18:23:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:05,227 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-02-15 18:23:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 18:23:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-02-15 18:23:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-15 18:23:05,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:05,228 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:05,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:23:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 18:23:05,434 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2018486625, now seen corresponding path program 9 times [2023-02-15 18:23:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716404731] [2023-02-15 18:23:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:05,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:23:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-15 18:23:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:05,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-15 18:23:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:23:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-02-15 18:23:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:23:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716404731] [2023-02-15 18:23:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716404731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:23:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156454816] [2023-02-15 18:23:05,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:23:05,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:23:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:23:05,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:23:05,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:23:09,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-15 18:23:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:23:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 18:23:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:23:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 1690 proven. 196 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2023-02-15 18:23:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:23:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-02-15 18:23:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156454816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:23:09,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:23:09,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-15 18:23:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971098733] [2023-02-15 18:23:09,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:23:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 18:23:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:23:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 18:23:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:23:09,616 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:23:09,659 INFO L93 Difference]: Finished difference Result 188 states and 197 transitions. [2023-02-15 18:23:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 18:23:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2023-02-15 18:23:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:23:09,664 INFO L225 Difference]: With dead ends: 188 [2023-02-15 18:23:09,664 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 18:23:09,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 422 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:23:09,665 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:23:09,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 108 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:23:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 18:23:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-15 18:23:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 18:23:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2023-02-15 18:23:09,670 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 216 [2023-02-15 18:23:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:23:09,671 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2023-02-15 18:23:09,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 18:23:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2023-02-15 18:23:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-02-15 18:23:09,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:23:09,673 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:23:09,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 18:23:09,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 18:23:09,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:23:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:23:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash -785433547, now seen corresponding path program 10 times [2023-02-15 18:23:09,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:23:09,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460144988] [2023-02-15 18:23:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:23:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:23:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:10,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 18:24:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-15 18:24:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:27,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-02-15 18:24:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:24:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 9 proven. 4414 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-15 18:24:36,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:24:36,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460144988] [2023-02-15 18:24:36,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460144988] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:24:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334838878] [2023-02-15 18:24:36,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:24:36,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:24:36,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:24:36,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:24:36,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:24:39,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:24:39,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:24:39,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 428 conjunts are in the unsatisfiable core [2023-02-15 18:24:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:24:39,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 18:24:47,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:24:51,678 INFO L321 Elim1Store]: treesize reduction 3168, result has 17.9 percent of original size [2023-02-15 18:24:51,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 28 select indices, 28 select index equivalence classes, 66 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 394 case distinctions, treesize of input 736 treesize of output 936