./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o1000.c --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/recursive-simple/id_o1000.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ac5ce2c5b306e431b6746a0cb1bbdfcd1ec9c3d54097bd6037af4480ff2bd07 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:51:34,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:51:34,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:51:34,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:51:34,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:51:34,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:51:34,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:51:34,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:51:34,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:51:34,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:51:34,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:51:34,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:51:34,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:51:34,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:51:34,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:51:34,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:51:34,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:51:34,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:51:34,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:51:34,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:51:34,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:51:34,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:51:34,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:51:34,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:51:34,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:51:34,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:51:34,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:51:34,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:51:34,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:51:34,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:51:34,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:51:34,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:51:34,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:51:34,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:51:34,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:51:34,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:51:34,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:51:34,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:51:34,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:51:34,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:51:34,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:51:34,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 00:51:34,803 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:51:34,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:51:34,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:51:34,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:51:34,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:51:34,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:51:34,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:51:34,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:51:34,805 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:51:34,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:51:34,806 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:51:34,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:51:34,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 00:51:34,808 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:51:34,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 00:51:34,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:51:34,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:51:34,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:51:34,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:51:34,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:51:34,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 00:51:34,810 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:51:34,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:51:34,810 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:51:34,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ac5ce2c5b306e431b6746a0cb1bbdfcd1ec9c3d54097bd6037af4480ff2bd07 [2023-02-15 00:51:34,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:51:35,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:51:35,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:51:35,006 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:51:35,007 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:51:35,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o1000.c [2023-02-15 00:51:35,986 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:51:36,118 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:51:36,119 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c [2023-02-15 00:51:36,122 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335fec99d/7b0dcf42505e4f249a3621232447f812/FLAG7f1fba19f [2023-02-15 00:51:36,132 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335fec99d/7b0dcf42505e4f249a3621232447f812 [2023-02-15 00:51:36,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:51:36,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:51:36,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:51:36,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:51:36,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:51:36,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbbacdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36, skipping insertion in model container [2023-02-15 00:51:36,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:51:36,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:51:36,256 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/recursive-simple/id_o1000.c[520,533] [2023-02-15 00:51:36,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:51:36,269 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:51:36,279 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/recursive-simple/id_o1000.c[520,533] [2023-02-15 00:51:36,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:51:36,289 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:51:36,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36 WrapperNode [2023-02-15 00:51:36,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:51:36,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:51:36,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:51:36,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:51:36,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,310 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-02-15 00:51:36,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:51:36,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:51:36,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:51:36,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:51:36,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:51:36,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:51:36,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:51:36,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:51:36,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (1/1) ... [2023-02-15 00:51:36,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:51:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:36,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 00:51:36,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 00:51:36,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 00:51:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:51:36,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:51:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 00:51:36,379 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-02-15 00:51:36,379 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-02-15 00:51:36,420 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:51:36,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:51:36,536 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:51:36,540 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:51:36,540 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 00:51:36,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:36 BoogieIcfgContainer [2023-02-15 00:51:36,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:51:36,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:51:36,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:51:36,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:51:36,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:51:36" (1/3) ... [2023-02-15 00:51:36,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd15150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:36, skipping insertion in model container [2023-02-15 00:51:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:36" (2/3) ... [2023-02-15 00:51:36,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd15150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:36, skipping insertion in model container [2023-02-15 00:51:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:36" (3/3) ... [2023-02-15 00:51:36,547 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2023-02-15 00:51:36,559 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:51:36,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 00:51:36,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:51:36,613 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;@31418d5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:51:36,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 00:51:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:51:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:51:36,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:36,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:36,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-02-15 00:51:36,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393057114] [2023-02-15 00:51:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:36,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:51:36,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:36,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393057114] [2023-02-15 00:51:36,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393057114] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:51:36,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:51:36,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:51:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375134632] [2023-02-15 00:51:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:51:36,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:51:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:51:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:51:36,893 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 00:51:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:36,925 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-15 00:51:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:51:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-02-15 00:51:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:36,931 INFO L225 Difference]: With dead ends: 28 [2023-02-15 00:51:36,931 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 00:51:36,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:51:36,936 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 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 [2023-02-15 00:51:36,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:51:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 00:51:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 00:51:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 00:51:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-02-15 00:51:36,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-02-15 00:51:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:36,959 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-02-15 00:51:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 00:51:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-02-15 00:51:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 00:51:36,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:36,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 00:51:36,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-02-15 00:51:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:36,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743294914] [2023-02-15 00:51:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:37,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:37,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743294914] [2023-02-15 00:51:37,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743294914] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276167653] [2023-02-15 00:51:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:37,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:37,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 00:51:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 00:51:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:37,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:37,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276167653] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:37,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:37,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 00:51:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499647800] [2023-02-15 00:51:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:37,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 00:51:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 00:51:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:51:37,421 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 00:51:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:37,466 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-02-15 00:51:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 00:51:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-02-15 00:51:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:37,468 INFO L225 Difference]: With dead ends: 27 [2023-02-15 00:51:37,468 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 00:51:37,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:51:37,476 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:37,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:51:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 00:51:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 00:51:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 00:51:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-15 00:51:37,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-02-15 00:51:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:37,486 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-15 00:51:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 00:51:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-15 00:51:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 00:51:37,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:37,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:37,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 00:51:37,691 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 [2023-02-15 00:51:37,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2023-02-15 00:51:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165521300] [2023-02-15 00:51:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:37,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:37,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165521300] [2023-02-15 00:51:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165521300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292089744] [2023-02-15 00:51:37,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:51:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:37,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:37,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 00:51:38,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:51:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 00:51:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:38,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:38,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292089744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:38,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:38,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-15 00:51:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444747862] [2023-02-15 00:51:38,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 00:51:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 00:51:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-15 00:51:38,374 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 00:51:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:38,548 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-02-15 00:51:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 00:51:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2023-02-15 00:51:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:38,549 INFO L225 Difference]: With dead ends: 39 [2023-02-15 00:51:38,549 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 00:51:38,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-15 00:51:38,550 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:38,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:51:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 00:51:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 00:51:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 00:51:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-15 00:51:38,555 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-02-15 00:51:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-15 00:51:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 00:51:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-15 00:51:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 00:51:38,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:38,556 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:38,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 00:51:38,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 00:51:38,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2023-02-15 00:51:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657497066] [2023-02-15 00:51:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657497066] [2023-02-15 00:51:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657497066] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130941061] [2023-02-15 00:51:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:51:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:39,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:39,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 00:51:39,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 00:51:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 00:51:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:39,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:40,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130941061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:40,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:40,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-15 00:51:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874057228] [2023-02-15 00:51:40,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 00:51:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 00:51:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 00:51:40,157 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 00:51:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:42,324 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-02-15 00:51:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 00:51:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2023-02-15 00:51:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:42,326 INFO L225 Difference]: With dead ends: 63 [2023-02-15 00:51:42,326 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 00:51:42,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 00:51:42,327 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:42,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:51:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 00:51:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-15 00:51:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-02-15 00:51:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 00:51:42,341 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-02-15 00:51:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:42,342 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 00:51:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 00:51:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 00:51:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 00:51:42,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:42,346 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:42,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 00:51:42,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:42,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2023-02-15 00:51:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537266217] [2023-02-15 00:51:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:44,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537266217] [2023-02-15 00:51:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537266217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936962472] [2023-02-15 00:51:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:51:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:44,095 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:44,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 00:51:44,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:51:44,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 00:51:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:46,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936962472] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:46,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:46,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-15 00:51:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092063625] [2023-02-15 00:51:46,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:46,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-15 00:51:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-15 00:51:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 00:51:46,623 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 00:52:07,995 WARN L233 SmtUtils]: Spent 17.05s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:52:27,833 WARN L233 SmtUtils]: Spent 9.62s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:52:47,248 WARN L233 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:03,961 WARN L233 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:14,262 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:29,348 WARN L233 SmtUtils]: Spent 11.71s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:54:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:54:11,059 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-02-15 00:54:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 00:54:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2023-02-15 00:54:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:54:11,062 INFO L225 Difference]: With dead ends: 111 [2023-02-15 00:54:11,062 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 00:54:11,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 145.4s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 00:54:11,065 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 00:54:11,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 985 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 00:54:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 00:54:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 00:54:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2023-02-15 00:54:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-15 00:54:11,077 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2023-02-15 00:54:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:54:11,077 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-15 00:54:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 00:54:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-15 00:54:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-15 00:54:11,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:54:11,080 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:54:11,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 00:54:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:54:11,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:54:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:54:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 5 times [2023-02-15 00:54:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:54:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824466726] [2023-02-15 00:54:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:54:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:54:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:18,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:18,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:54:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824466726] [2023-02-15 00:54:18,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824466726] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:54:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128819901] [2023-02-15 00:54:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:54:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:54:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:54:18,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:54:18,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 00:54:29,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-02-15 00:54:29,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:54:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-15 00:54:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:54:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:29,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:54:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:37,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128819901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:54:37,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:54:37,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-15 00:54:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829006683] [2023-02-15 00:54:37,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:54:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-15 00:54:37,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:54:37,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-15 00:54:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 00:54:37,430 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 69 states have internal predecessors, (139), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64)