./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/n.c24.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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:05:54,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:05:54,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:05:54,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:05:54,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:05:54,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:05:54,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:05:54,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:05:54,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:05:54,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:05:54,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:05:54,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:05:54,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:05:54,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:05:54,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:05:54,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:05:54,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:05:54,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:05:54,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:05:54,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:05:54,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:05:54,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:05:54,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:05:54,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:05:54,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:05:54,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:05:54,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:05:54,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:05:54,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:05:54,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:05:55,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:05:55,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:05:55,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:05:55,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:05:55,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:05:55,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:05:55,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:05:55,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:05:55,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:05:55,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:05:55,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:05:55,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:05:55,032 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:05:55,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:05:55,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:05:55,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:05:55,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:05:55,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:05:55,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:05:55,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:05:55,034 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:05:55,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:05:55,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:05:55,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:05:55,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:05:55,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:05:55,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:05:55,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:05:55,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:05:55,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:05:55,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:05:55,045 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:05:55,046 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2023-02-14 23:05:55,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:05:55,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:05:55,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:05:55,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:05:55,234 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:05:55,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2023-02-14 23:05:56,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:05:56,279 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:05:56,279 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2023-02-14 23:05:56,284 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487a199fb/40a019002e0247c6873041ce164a4ca3/FLAG4284a5a3d [2023-02-14 23:05:56,292 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487a199fb/40a019002e0247c6873041ce164a4ca3 [2023-02-14 23:05:56,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:05:56,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:05:56,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:05:56,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:05:56,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:05:56,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f55c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56, skipping insertion in model container [2023-02-14 23:05:56,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:05:56,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:05:56,427 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/loops/n.c24.i[805,818] [2023-02-14 23:05:56,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:05:56,483 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:05:56,494 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/loops/n.c24.i[805,818] [2023-02-14 23:05:56,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:05:56,520 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:05:56,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56 WrapperNode [2023-02-14 23:05:56,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:05:56,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:05:56,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:05:56,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:05:56,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,550 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 154 [2023-02-14 23:05:56,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:05:56,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:05:56,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:05:56,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:05:56,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:05:56,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:05:56,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:05:56,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:05:56,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (1/1) ... [2023-02-14 23:05:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:05:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:05:56,598 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) [2023-02-14 23:05:56,600 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 [2023-02-14 23:05:56,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:05:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-14 23:05:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 23:05:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 23:05:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 23:05:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 23:05:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:05:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-14 23:05:56,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:05:56,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:05:56,720 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:05:56,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:05:56,911 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:05:56,916 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:05:56,916 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-14 23:05:56,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:05:56 BoogieIcfgContainer [2023-02-14 23:05:56,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:05:56,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:05:56,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:05:56,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:05:56,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:05:56" (1/3) ... [2023-02-14 23:05:56,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56198a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:05:56, skipping insertion in model container [2023-02-14 23:05:56,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:05:56" (2/3) ... [2023-02-14 23:05:56,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56198a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:05:56, skipping insertion in model container [2023-02-14 23:05:56,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:05:56" (3/3) ... [2023-02-14 23:05:56,923 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-02-14 23:05:56,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:05:56,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:05:56,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:05:56,987 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;@77cc1f1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:05:56,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:05:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 23:05:56,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:56,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:56,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2023-02-14 23:05:57,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894482127] [2023-02-14 23:05:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:05:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:05:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894482127] [2023-02-14 23:05:57,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894482127] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:05:57,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:05:57,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:05:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550980605] [2023-02-14 23:05:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:05:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 23:05:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:05:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 23:05:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:05:57,192 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:05:57,236 INFO L93 Difference]: Finished difference Result 90 states and 141 transitions. [2023-02-14 23:05:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 23:05:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 23:05:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:05:57,256 INFO L225 Difference]: With dead ends: 90 [2023-02-14 23:05:57,258 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 23:05:57,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:05:57,263 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:05:57,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:05:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 23:05:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2023-02-14 23:05:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-02-14 23:05:57,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2023-02-14 23:05:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:05:57,308 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-02-14 23:05:57,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-02-14 23:05:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 23:05:57,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:57,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:57,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 23:05:57,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2023-02-14 23:05:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:57,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278455127] [2023-02-14 23:05:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:05:57,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:05:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278455127] [2023-02-14 23:05:57,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278455127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:05:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880046142] [2023-02-14 23:05:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:57,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:05:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:05:57,442 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) [2023-02-14 23:05:57,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:05:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 23:05:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:05:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:05:57,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:05:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:05:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880046142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:05:57,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:05:57,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 23:05:57,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136049224] [2023-02-14 23:05:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:05:57,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 23:05:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:05:57,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 23:05:57,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:05:57,586 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:05:57,668 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2023-02-14 23:05:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:05:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 23:05:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:05:57,670 INFO L225 Difference]: With dead ends: 128 [2023-02-14 23:05:57,670 INFO L226 Difference]: Without dead ends: 101 [2023-02-14 23:05:57,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:05:57,671 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:05:57,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 116 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:05:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-14 23:05:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-14 23:05:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2023-02-14 23:05:57,679 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2023-02-14 23:05:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:05:57,679 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2023-02-14 23:05:57,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2023-02-14 23:05:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 23:05:57,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:57,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:57,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 23:05:57,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:05:57,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2023-02-14 23:05:57,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:57,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547297001] [2023-02-14 23:05:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 23:05:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:05:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547297001] [2023-02-14 23:05:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547297001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:05:58,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:05:58,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:05:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683473856] [2023-02-14 23:05:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:05:58,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:05:58,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:05:58,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:05:58,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:05:58,056 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:05:58,076 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2023-02-14 23:05:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:05:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 23:05:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:05:58,078 INFO L225 Difference]: With dead ends: 187 [2023-02-14 23:05:58,078 INFO L226 Difference]: Without dead ends: 183 [2023-02-14 23:05:58,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:05:58,079 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:05:58,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:05:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-14 23:05:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2023-02-14 23:05:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2023-02-14 23:05:58,090 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 36 [2023-02-14 23:05:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:05:58,090 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2023-02-14 23:05:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2023-02-14 23:05:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 23:05:58,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:58,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 23:05:58,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 1 times [2023-02-14 23:05:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008509393] [2023-02-14 23:05:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:58,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 23:05:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:05:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008509393] [2023-02-14 23:05:58,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008509393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:05:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33508151] [2023-02-14 23:05:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:05:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:05:58,205 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) [2023-02-14 23:05:58,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:05:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 23:05:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:05:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 23:05:58,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:05:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 23:05:58,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33508151] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:05:58,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:05:58,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 23:05:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058753641] [2023-02-14 23:05:58,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:05:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 23:05:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:05:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 23:05:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:05:58,375 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:05:58,511 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2023-02-14 23:05:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 23:05:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-14 23:05:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:05:58,515 INFO L225 Difference]: With dead ends: 351 [2023-02-14 23:05:58,516 INFO L226 Difference]: Without dead ends: 260 [2023-02-14 23:05:58,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:05:58,518 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 640 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:05:58,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 280 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:05:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-14 23:05:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2023-02-14 23:05:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2023-02-14 23:05:58,549 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 41 [2023-02-14 23:05:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:05:58,550 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2023-02-14 23:05:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2023-02-14 23:05:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-14 23:05:58,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:58,556 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:58,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 23:05:58,760 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,SelfDestructingSolverStorable3 [2023-02-14 23:05:58,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 2 times [2023-02-14 23:05:58,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:58,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650698369] [2023-02-14 23:05:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:58,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:05:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-02-14 23:05:59,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:05:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650698369] [2023-02-14 23:05:59,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650698369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:05:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108577220] [2023-02-14 23:05:59,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:05:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:05:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:05:59,053 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) [2023-02-14 23:05:59,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:05:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:05:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:05:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 23:05:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:05:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-02-14 23:05:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:05:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-02-14 23:05:59,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108577220] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:05:59,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:05:59,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 23:05:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575995174] [2023-02-14 23:05:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:05:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 23:05:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:05:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 23:05:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 23:05:59,342 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:05:59,647 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2023-02-14 23:05:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 23:05:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-02-14 23:05:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:05:59,649 INFO L225 Difference]: With dead ends: 771 [2023-02-14 23:05:59,649 INFO L226 Difference]: Without dead ends: 554 [2023-02-14 23:05:59,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 23:05:59,651 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2409 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:05:59,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2409 Valid, 544 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:05:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-02-14 23:05:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2023-02-14 23:05:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2023-02-14 23:05:59,671 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2023-02-14 23:05:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:05:59,672 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2023-02-14 23:05:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:05:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2023-02-14 23:05:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-14 23:05:59,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:05:59,673 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:05:59,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 23:05:59,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:05:59,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:05:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:05:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 3 times [2023-02-14 23:05:59,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:05:59,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941234263] [2023-02-14 23:05:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:05:59,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:05:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:06:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2023-02-14 23:06:00,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:06:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941234263] [2023-02-14 23:06:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941234263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:06:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401324332] [2023-02-14 23:06:00,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:06:00,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:06:00,510 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) [2023-02-14 23:06:00,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:06:00,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:06:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:06:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 23:06:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:06:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2023-02-14 23:06:00,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:06:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2023-02-14 23:06:00,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401324332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:06:00,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:06:00,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2023-02-14 23:06:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203631192] [2023-02-14 23:06:00,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:06:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 23:06:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:06:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 23:06:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 23:06:00,806 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:06:05,490 INFO L93 Difference]: Finished difference Result 2608 states and 3704 transitions. [2023-02-14 23:06:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-02-14 23:06:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2023-02-14 23:06:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:06:05,496 INFO L225 Difference]: With dead ends: 2608 [2023-02-14 23:06:05,496 INFO L226 Difference]: Without dead ends: 2133 [2023-02-14 23:06:05,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11157 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8191, Invalid=22609, Unknown=0, NotChecked=0, Total=30800 [2023-02-14 23:06:05,505 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12861 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12861 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:06:05,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12861 Valid, 701 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 23:06:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2023-02-14 23:06:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 590. [2023-02-14 23:06:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4023769100169778) internal successors, (826), 589 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 826 transitions. [2023-02-14 23:06:05,563 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 826 transitions. Word has length 167 [2023-02-14 23:06:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:06:05,565 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 826 transitions. [2023-02-14 23:06:05,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 826 transitions. [2023-02-14 23:06:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-02-14 23:06:05,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:06:05,569 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:06:05,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 23:06:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:05,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:06:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:06:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 914783370, now seen corresponding path program 4 times [2023-02-14 23:06:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:06:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670265056] [2023-02-14 23:06:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:06:05,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:06:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:06:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2023-02-14 23:06:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:06:06,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670265056] [2023-02-14 23:06:06,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670265056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:06:06,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769982053] [2023-02-14 23:06:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:06:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:06:06,557 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) [2023-02-14 23:06:06,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:06:06,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:06:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:06:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 23:06:06,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:06:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2023-02-14 23:06:06,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:06:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2023-02-14 23:06:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769982053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:06:07,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:06:07,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-14 23:06:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306992470] [2023-02-14 23:06:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:06:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 23:06:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:06:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 23:06:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 23:06:07,385 INFO L87 Difference]: Start difference. First operand 590 states and 826 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:06:08,366 INFO L93 Difference]: Finished difference Result 3058 states and 4504 transitions. [2023-02-14 23:06:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 23:06:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2023-02-14 23:06:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:06:08,375 INFO L225 Difference]: With dead ends: 3058 [2023-02-14 23:06:08,375 INFO L226 Difference]: Without dead ends: 2517 [2023-02-14 23:06:08,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 23:06:08,377 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4584 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4584 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:06:08,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4584 Valid, 1200 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:06:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2023-02-14 23:06:08,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1165. [2023-02-14 23:06:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.3969072164948453) internal successors, (1626), 1164 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1626 transitions. [2023-02-14 23:06:08,452 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1626 transitions. Word has length 189 [2023-02-14 23:06:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:06:08,453 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1626 transitions. [2023-02-14 23:06:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1626 transitions. [2023-02-14 23:06:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-02-14 23:06:08,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:06:08,459 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:06:08,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 23:06:08,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:08,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:06:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:06:08,660 INFO L85 PathProgramCache]: Analyzing trace with hash 892851466, now seen corresponding path program 5 times [2023-02-14 23:06:08,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:06:08,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033060040] [2023-02-14 23:06:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:06:08,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:06:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:06:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2023-02-14 23:06:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:06:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033060040] [2023-02-14 23:06:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033060040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:06:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734935778] [2023-02-14 23:06:10,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:06:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:06:10,712 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) [2023-02-14 23:06:10,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:06:48,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-14 23:06:48,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:06:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 23:06:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:06:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2023-02-14 23:06:48,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:06:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2023-02-14 23:06:50,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734935778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:06:50,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:06:50,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-14 23:06:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26332522] [2023-02-14 23:06:50,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:06:50,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-14 23:06:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:06:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-14 23:06:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 23:06:50,571 INFO L87 Difference]: Start difference. First operand 1165 states and 1626 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:06:57,173 INFO L93 Difference]: Finished difference Result 6083 states and 8954 transitions. [2023-02-14 23:06:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-14 23:06:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2023-02-14 23:06:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:06:57,186 INFO L225 Difference]: With dead ends: 6083 [2023-02-14 23:06:57,186 INFO L226 Difference]: Without dead ends: 5017 [2023-02-14 23:06:57,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 23:06:57,190 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 10065 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10065 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:06:57,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10065 Valid, 2412 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 23:06:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2023-02-14 23:06:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 2315. [2023-02-14 23:06:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 1.3941227312013829) internal successors, (3226), 2314 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3226 transitions. [2023-02-14 23:06:57,333 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3226 transitions. Word has length 364 [2023-02-14 23:06:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:06:57,333 INFO L495 AbstractCegarLoop]: Abstraction has 2315 states and 3226 transitions. [2023-02-14 23:06:57,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:06:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3226 transitions. [2023-02-14 23:06:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2023-02-14 23:06:57,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:06:57,344 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:06:57,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:06:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:06:57,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:06:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:06:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1941301934, now seen corresponding path program 6 times [2023-02-14 23:06:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:06:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862247066] [2023-02-14 23:06:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:06:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:06:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:07:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24285 trivial. 0 not checked. [2023-02-14 23:07:04,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:07:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862247066] [2023-02-14 23:07:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862247066] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:07:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132359452] [2023-02-14 23:07:04,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:07:04,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:07:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:07:04,711 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) [2023-02-14 23:07:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:07:04,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-14 23:07:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:07:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 23:07:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:07:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2023-02-14 23:07:05,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:07:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2023-02-14 23:07:05,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132359452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:07:05,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:07:05,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 115 [2023-02-14 23:07:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305254327] [2023-02-14 23:07:05,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:07:05,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-02-14 23:07:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:07:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-02-14 23:07:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5127, Invalid=7983, Unknown=0, NotChecked=0, Total=13110 [2023-02-14 23:07:05,700 INFO L87 Difference]: Start difference. First operand 2315 states and 3226 transitions. Second operand has 115 states, 115 states have (on average 2.4) internal successors, (276), 115 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)