./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/array-tiling/pnr4.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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:48:23,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:48:23,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:48:23,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:48:23,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:48:23,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:48:23,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:48:23,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:48:23,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:48:23,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:48:23,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:48:23,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:48:23,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:48:23,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:48:23,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:48:23,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:48:23,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:48:23,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:48:23,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:48:23,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:48:23,708 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:48:23,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:48:23,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:48:23,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:48:23,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:48:23,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:48:23,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:48:23,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:48:23,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:48:23,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:48:23,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:48:23,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:48:23,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:48:23,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:48:23,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:48:23,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:48:23,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:48:23,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:48:23,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:48:23,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:48:23,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:48:23,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:48:23,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:48:23,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:48:23,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:48:23,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:48:23,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:48:23,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:48:23,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:48:23,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:48:23,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:48:23,756 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:48:23,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:48:23,757 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:48:23,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:48:23,759 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:48:23,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:48:23,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:48:23,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:48:23,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:48:23,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:48:23,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:48:23,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:48:23,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:48:23,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:48:23,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:48:23,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:48:23,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:48:23,761 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:48:23,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:48:23,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:48:23,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-07-22 09:48:24,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:48:24,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:48:24,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:48:24,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:48:24,046 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:48:24,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2022-07-22 09:48:24,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3016a784/c186c260f6d44b068b98d97f8ae06c1a/FLAGcbb5c22dc [2022-07-22 09:48:24,453 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:48:24,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2022-07-22 09:48:24,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3016a784/c186c260f6d44b068b98d97f8ae06c1a/FLAGcbb5c22dc [2022-07-22 09:48:24,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3016a784/c186c260f6d44b068b98d97f8ae06c1a [2022-07-22 09:48:24,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:48:24,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:48:24,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:48:24,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:48:24,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:48:24,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:24" (1/1) ... [2022-07-22 09:48:24,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb9e467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:24, skipping insertion in model container [2022-07-22 09:48:24,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:24" (1/1) ... [2022-07-22 09:48:24,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:48:24,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:48:25,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-07-22 09:48:25,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:48:25,077 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:48:25,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c[395,408] [2022-07-22 09:48:25,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:48:25,119 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:48:25,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25 WrapperNode [2022-07-22 09:48:25,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:48:25,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:48:25,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:48:25,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:48:25,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,169 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-22 09:48:25,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:48:25,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:48:25,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:48:25,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:48:25,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:48:25,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:48:25,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:48:25,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:48:25,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (1/1) ... [2022-07-22 09:48:25,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:48:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:25,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:48:25,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:48:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:48:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:48:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:48:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:48:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-22 09:48:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-22 09:48:25,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:48:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:48:25,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:48:25,335 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:48:25,336 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:48:25,476 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:48:25,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:48:25,481 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:48:25,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:25 BoogieIcfgContainer [2022-07-22 09:48:25,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:48:25,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:48:25,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:48:25,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:48:25,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:48:24" (1/3) ... [2022-07-22 09:48:25,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b772539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:25, skipping insertion in model container [2022-07-22 09:48:25,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:25" (2/3) ... [2022-07-22 09:48:25,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b772539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:25, skipping insertion in model container [2022-07-22 09:48:25,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:25" (3/3) ... [2022-07-22 09:48:25,502 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-07-22 09:48:25,514 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:48:25,527 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:48:25,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:48:25,586 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47916d54, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23e38539 [2022-07-22 09:48:25,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:48:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 09:48:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:48:25,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:25,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:25,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2022-07-22 09:48:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:25,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146693095] [2022-07-22 09:48:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:25,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:48:25,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:25,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146693095] [2022-07-22 09:48:25,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146693095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:48:25,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:48:25,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:48:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448994141] [2022-07-22 09:48:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:48:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:48:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:48:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:48:25,908 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:26,067 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2022-07-22 09:48:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:48:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 09:48:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:26,074 INFO L225 Difference]: With dead ends: 84 [2022-07-22 09:48:26,074 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 09:48:26,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:48:26,080 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:26,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:48:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 09:48:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-07-22 09:48:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 09:48:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-22 09:48:26,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2022-07-22 09:48:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:26,116 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-22 09:48:26,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:48:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-22 09:48:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 09:48:26,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:26,118 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:26,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:48:26,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2022-07-22 09:48:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961550723] [2022-07-22 09:48:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:26,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:26,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961550723] [2022-07-22 09:48:26,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961550723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653107318] [2022-07-22 09:48:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:26,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:26,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:48:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:48:26,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:26,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:26,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:26,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:26,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:26,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:26,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-07-22 09:48:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:26,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:27,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-22 09:48:27,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-22 09:48:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:27,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653107318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:27,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:27,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-22 09:48:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688655356] [2022-07-22 09:48:27,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:27,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:48:27,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:48:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:48:27,101 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:27,496 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2022-07-22 09:48:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:48:27,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2022-07-22 09:48:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:27,501 INFO L225 Difference]: With dead ends: 102 [2022-07-22 09:48:27,501 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 09:48:27,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:48:27,505 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:27,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 313 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:48:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 09:48:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-07-22 09:48:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 09:48:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-07-22 09:48:27,527 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 37 [2022-07-22 09:48:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:27,528 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-07-22 09:48:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-07-22 09:48:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 09:48:27,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:27,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:27,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:27,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:27,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2022-07-22 09:48:27,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365530027] [2022-07-22 09:48:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:27,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:27,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365530027] [2022-07-22 09:48:28,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365530027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805935152] [2022-07-22 09:48:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:28,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:28,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:48:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:48:28,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:28,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:28,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:28,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:28,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:48:28,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:48:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:48:28,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:29,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:48:29,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-07-22 09:48:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:29,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805935152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:29,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:29,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-22 09:48:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727027160] [2022-07-22 09:48:29,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:29,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:48:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:48:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:48:29,688 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:30,643 INFO L93 Difference]: Finished difference Result 172 states and 236 transitions. [2022-07-22 09:48:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 09:48:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-07-22 09:48:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:30,646 INFO L225 Difference]: With dead ends: 172 [2022-07-22 09:48:30,646 INFO L226 Difference]: Without dead ends: 170 [2022-07-22 09:48:30,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:48:30,648 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 187 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:30,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 501 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 545 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-07-22 09:48:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-22 09:48:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2022-07-22 09:48:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 57 states have internal predecessors, (75), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 09:48:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2022-07-22 09:48:30,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 37 [2022-07-22 09:48:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:30,668 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2022-07-22 09:48:30,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2022-07-22 09:48:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 09:48:30,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:30,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:30,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:30,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 09:48:30,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2022-07-22 09:48:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318910678] [2022-07-22 09:48:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318910678] [2022-07-22 09:48:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318910678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190784893] [2022-07-22 09:48:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:31,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:31,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:31,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:48:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:48:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:31,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:31,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:31,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:31,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:31,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:48:31,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:48:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:31,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190784893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:31,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:31,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-22 09:48:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852993182] [2022-07-22 09:48:31,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:48:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:48:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:48:31,340 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:31,782 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2022-07-22 09:48:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:48:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-07-22 09:48:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:31,784 INFO L225 Difference]: With dead ends: 262 [2022-07-22 09:48:31,784 INFO L226 Difference]: Without dead ends: 260 [2022-07-22 09:48:31,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:48:31,786 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:31,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 362 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:48:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-22 09:48:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 125. [2022-07-22 09:48:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 09:48:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2022-07-22 09:48:31,822 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 41 [2022-07-22 09:48:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:31,823 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2022-07-22 09:48:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2022-07-22 09:48:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 09:48:31,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:31,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:31,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 09:48:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:32,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2022-07-22 09:48:32,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:32,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910360973] [2022-07-22 09:48:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:32,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:32,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:32,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910360973] [2022-07-22 09:48:32,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910360973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:32,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70149781] [2022-07-22 09:48:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:32,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:32,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:32,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:32,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:48:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:48:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:32,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:32,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:32,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:32,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:32,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:48:32,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:48:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 09:48:32,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:33,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:48:33,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:48:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:33,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70149781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:33,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:33,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-22 09:48:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019285817] [2022-07-22 09:48:33,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:48:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:48:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:48:33,219 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:34,133 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2022-07-22 09:48:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 09:48:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-07-22 09:48:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:34,136 INFO L225 Difference]: With dead ends: 366 [2022-07-22 09:48:34,136 INFO L226 Difference]: Without dead ends: 364 [2022-07-22 09:48:34,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:48:34,137 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 187 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:34,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 630 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 733 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-07-22 09:48:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-22 09:48:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 181. [2022-07-22 09:48:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 135 states have internal predecessors, (185), 45 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2022-07-22 09:48:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 275 transitions. [2022-07-22 09:48:34,166 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 275 transitions. Word has length 41 [2022-07-22 09:48:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 275 transitions. [2022-07-22 09:48:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 275 transitions. [2022-07-22 09:48:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 09:48:34,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:34,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:34,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:34,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2022-07-22 09:48:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619969973] [2022-07-22 09:48:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:34,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:34,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:34,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619969973] [2022-07-22 09:48:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619969973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370991288] [2022-07-22 09:48:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:34,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:48:34,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:48:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:34,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:34,603 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:48:34,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:34,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:34,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:48:34,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:48:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370991288] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:34,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:34,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-22 09:48:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464504153] [2022-07-22 09:48:34,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:48:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:48:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:48:34,744 INFO L87 Difference]: Start difference. First operand 181 states and 275 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 09:48:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:35,478 INFO L93 Difference]: Finished difference Result 1228 states and 1937 transitions. [2022-07-22 09:48:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 09:48:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2022-07-22 09:48:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:35,485 INFO L225 Difference]: With dead ends: 1228 [2022-07-22 09:48:35,485 INFO L226 Difference]: Without dead ends: 1226 [2022-07-22 09:48:35,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:48:35,487 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 99 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:35,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 414 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:48:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-07-22 09:48:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 402. [2022-07-22 09:48:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 294 states have (on average 1.435374149659864) internal successors, (422), 296 states have internal predecessors, (422), 104 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2022-07-22 09:48:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 630 transitions. [2022-07-22 09:48:35,559 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 630 transitions. Word has length 45 [2022-07-22 09:48:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:35,559 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 630 transitions. [2022-07-22 09:48:35,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 09:48:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 630 transitions. [2022-07-22 09:48:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 09:48:35,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:35,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:35,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:35,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2022-07-22 09:48:35,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287767026] [2022-07-22 09:48:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:35,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:35,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287767026] [2022-07-22 09:48:35,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287767026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:35,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892671560] [2022-07-22 09:48:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:35,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:35,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:35,911 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) [2022-07-22 09:48:35,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:48:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:48:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:36,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:36,118 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:48:36,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:48:36,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:48:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:48:36,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:38,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:48:38,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:48:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892671560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:38,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-22 09:48:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194393800] [2022-07-22 09:48:38,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:38,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:48:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:48:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=465, Unknown=1, NotChecked=0, Total=552 [2022-07-22 09:48:38,468 INFO L87 Difference]: Start difference. First operand 402 states and 630 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:39,877 INFO L93 Difference]: Finished difference Result 1335 states and 2064 transitions. [2022-07-22 09:48:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:48:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2022-07-22 09:48:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:39,884 INFO L225 Difference]: With dead ends: 1335 [2022-07-22 09:48:39,885 INFO L226 Difference]: Without dead ends: 1333 [2022-07-22 09:48:39,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=549, Invalid=2990, Unknown=1, NotChecked=0, Total=3540 [2022-07-22 09:48:39,887 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 231 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:39,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 819 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1079 Invalid, 0 Unknown, 130 Unchecked, 0.8s Time] [2022-07-22 09:48:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-07-22 09:48:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 462. [2022-07-22 09:48:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 334 states have (on average 1.437125748502994) internal successors, (480), 341 states have internal predecessors, (480), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 09:48:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2022-07-22 09:48:39,986 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 45 [2022-07-22 09:48:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:39,987 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2022-07-22 09:48:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 24 states have internal predecessors, (84), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:48:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2022-07-22 09:48:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 09:48:39,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:39,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:40,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 09:48:40,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:40,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2022-07-22 09:48:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729887491] [2022-07-22 09:48:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:40,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729887491] [2022-07-22 09:48:40,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729887491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:40,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456958933] [2022-07-22 09:48:40,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:48:40,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:40,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:40,377 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) [2022-07-22 09:48:40,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:48:40,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:48:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:48:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:40,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:48:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:40,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:40,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:48:40,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:48:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:40,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456958933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:40,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:40,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-22 09:48:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343567856] [2022-07-22 09:48:40,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:48:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:48:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:48:40,691 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:48:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:42,344 INFO L93 Difference]: Finished difference Result 3755 states and 5968 transitions. [2022-07-22 09:48:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 09:48:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-07-22 09:48:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:42,361 INFO L225 Difference]: With dead ends: 3755 [2022-07-22 09:48:42,362 INFO L226 Difference]: Without dead ends: 3753 [2022-07-22 09:48:42,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 09:48:42,366 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 254 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:42,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 837 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 09:48:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-07-22 09:48:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1478. [2022-07-22 09:48:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1068 states have (on average 1.4691011235955056) internal successors, (1569), 1068 states have internal predecessors, (1569), 404 states have call successors, (404), 5 states have call predecessors, (404), 5 states have return successors, (404), 404 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-22 09:48:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2377 transitions. [2022-07-22 09:48:42,580 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2377 transitions. Word has length 49 [2022-07-22 09:48:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:42,581 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 2377 transitions. [2022-07-22 09:48:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:48:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2377 transitions. [2022-07-22 09:48:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 09:48:42,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:42,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:42,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:42,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2022-07-22 09:48:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:42,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923953611] [2022-07-22 09:48:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:42,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:43,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:43,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923953611] [2022-07-22 09:48:43,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923953611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108117406] [2022-07-22 09:48:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:43,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:43,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:43,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:48:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:48:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:43,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 09:48:43,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:48:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:43,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:48:43,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:48:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:43,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108117406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:43,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:43,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-22 09:48:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349579845] [2022-07-22 09:48:43,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:43,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:48:43,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:48:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:48:43,582 INFO L87 Difference]: Start difference. First operand 1478 states and 2377 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 09:48:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:47,605 INFO L93 Difference]: Finished difference Result 5541 states and 8827 transitions. [2022-07-22 09:48:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-22 09:48:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2022-07-22 09:48:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:47,627 INFO L225 Difference]: With dead ends: 5541 [2022-07-22 09:48:47,628 INFO L226 Difference]: Without dead ends: 5539 [2022-07-22 09:48:47,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1221, Invalid=7521, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 09:48:47,635 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 667 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 1514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 4341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1514 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:47,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1113 Invalid, 4341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1514 Valid, 2827 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 09:48:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2022-07-22 09:48:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 486. [2022-07-22 09:48:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 358 states have (on average 1.4189944134078212) internal successors, (508), 365 states have internal predecessors, (508), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-22 09:48:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 752 transitions. [2022-07-22 09:48:47,838 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 752 transitions. Word has length 49 [2022-07-22 09:48:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:47,839 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 752 transitions. [2022-07-22 09:48:47,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 3 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 09:48:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 752 transitions. [2022-07-22 09:48:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 09:48:47,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:47,841 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:47,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 09:48:48,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2022-07-22 09:48:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:48,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298727513] [2022-07-22 09:48:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:48,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:48,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298727513] [2022-07-22 09:48:48,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298727513] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:48,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515916330] [2022-07-22 09:48:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:48:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:48,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:48,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:48:48,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:48:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 09:48:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:48,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:48:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515916330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:48,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:48,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2022-07-22 09:48:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370032572] [2022-07-22 09:48:48,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 09:48:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 09:48:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:48:48,914 INFO L87 Difference]: Start difference. First operand 486 states and 752 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 09:48:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:49,307 INFO L93 Difference]: Finished difference Result 769 states and 1180 transitions. [2022-07-22 09:48:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:48:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 53 [2022-07-22 09:48:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:49,310 INFO L225 Difference]: With dead ends: 769 [2022-07-22 09:48:49,310 INFO L226 Difference]: Without dead ends: 745 [2022-07-22 09:48:49,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:48:49,312 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 465 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:49,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 133 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:48:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-07-22 09:48:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 519. [2022-07-22 09:48:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 390 states have (on average 1.405128205128205) internal successors, (548), 390 states have internal predecessors, (548), 123 states have call successors, (123), 5 states have call predecessors, (123), 5 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-07-22 09:48:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 794 transitions. [2022-07-22 09:48:49,440 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 794 transitions. Word has length 53 [2022-07-22 09:48:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:49,441 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 794 transitions. [2022-07-22 09:48:49,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 09:48:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 794 transitions. [2022-07-22 09:48:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:48:49,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:49,443 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:49,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:49,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 09:48:49,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2022-07-22 09:48:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:49,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099309681] [2022-07-22 09:48:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:49,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:48:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:48:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:48:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:48:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099309681] [2022-07-22 09:48:49,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099309681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701903607] [2022-07-22 09:48:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:49,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:49,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:49,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:48:50,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:50,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:48:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:50,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:50,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:50,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:48:50,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:48:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 09:48:50,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:52,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701903607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:52,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:48:52,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-22 09:48:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912704156] [2022-07-22 09:48:52,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:48:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:48:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-22 09:48:52,052 INFO L87 Difference]: Start difference. First operand 519 states and 794 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:52,862 INFO L93 Difference]: Finished difference Result 679 states and 1013 transitions. [2022-07-22 09:48:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:48:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2022-07-22 09:48:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:52,867 INFO L225 Difference]: With dead ends: 679 [2022-07-22 09:48:52,867 INFO L226 Difference]: Without dead ends: 677 [2022-07-22 09:48:52,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2022-07-22 09:48:52,868 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 128 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:52,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 436 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 585 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-22 09:48:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-07-22 09:48:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 393. [2022-07-22 09:48:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 296 states have (on average 1.3682432432432432) internal successors, (405), 296 states have internal predecessors, (405), 87 states have call successors, (87), 9 states have call predecessors, (87), 9 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-07-22 09:48:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 579 transitions. [2022-07-22 09:48:52,987 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 579 transitions. Word has length 63 [2022-07-22 09:48:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:52,988 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 579 transitions. [2022-07-22 09:48:52,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 579 transitions. [2022-07-22 09:48:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 09:48:52,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:52,990 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:53,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:53,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 09:48:53,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2022-07-22 09:48:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768719011] [2022-07-22 09:48:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:48:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:48:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:48:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:48:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768719011] [2022-07-22 09:48:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768719011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51508624] [2022-07-22 09:48:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:53,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:53,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:48:53,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:48:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:53,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:48:53,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:53,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 09:48:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 09:48:53,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51508624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:54,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:48:54,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-22 09:48:54,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126593747] [2022-07-22 09:48:54,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:54,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:48:54,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:48:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2022-07-22 09:48:54,972 INFO L87 Difference]: Start difference. First operand 393 states and 579 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:55,573 INFO L93 Difference]: Finished difference Result 495 states and 714 transitions. [2022-07-22 09:48:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:48:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2022-07-22 09:48:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:55,575 INFO L225 Difference]: With dead ends: 495 [2022-07-22 09:48:55,575 INFO L226 Difference]: Without dead ends: 493 [2022-07-22 09:48:55,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1089, Unknown=1, NotChecked=0, Total=1332 [2022-07-22 09:48:55,576 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 154 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:55,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 411 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 579 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-07-22 09:48:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-22 09:48:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 180. [2022-07-22 09:48:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 138 states have (on average 1.3043478260869565) internal successors, (180), 139 states have internal predecessors, (180), 35 states have call successors, (35), 6 states have call predecessors, (35), 6 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 09:48:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2022-07-22 09:48:55,654 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 67 [2022-07-22 09:48:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:55,654 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2022-07-22 09:48:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2022-07-22 09:48:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 09:48:55,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:55,656 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:55,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:48:55,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1787147777, now seen corresponding path program 2 times [2022-07-22 09:48:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:55,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394222019] [2022-07-22 09:48:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:48:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:48:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:48:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:48:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394222019] [2022-07-22 09:48:56,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394222019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217817532] [2022-07-22 09:48:56,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:48:56,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:56,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:56,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:48:56,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:48:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:48:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:56,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:56,279 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:48:56,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:48:56,365 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:48:56,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:56,423 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:48:56,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:56,478 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:48:56,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:56,541 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:48:56,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:48:56,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:48:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 09:48:56,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217817532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:56,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:48:56,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-22 09:48:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050288654] [2022-07-22 09:48:56,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:48:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:48:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:48:56,837 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:57,724 INFO L93 Difference]: Finished difference Result 257 states and 356 transitions. [2022-07-22 09:48:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 09:48:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 71 [2022-07-22 09:48:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:57,726 INFO L225 Difference]: With dead ends: 257 [2022-07-22 09:48:57,726 INFO L226 Difference]: Without dead ends: 255 [2022-07-22 09:48:57,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1997, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:48:57,727 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 148 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:57,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 532 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 739 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-07-22 09:48:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-22 09:48:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2022-07-22 09:48:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 79 states have internal predecessors, (96), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 09:48:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2022-07-22 09:48:57,788 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 71 [2022-07-22 09:48:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:57,789 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2022-07-22 09:48:57,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-22 09:48:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2022-07-22 09:48:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 09:48:57,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:57,790 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:57,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:58,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:48:58,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2022-07-22 09:48:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171073713] [2022-07-22 09:48:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:48:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:48:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:48:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:48:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:48:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:48:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:58,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171073713] [2022-07-22 09:48:58,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171073713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764077977] [2022-07-22 09:48:58,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:48:58,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:58,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:58,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:58,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:48:58,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 09:48:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:58,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:48:58,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:58,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:48:58,354 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:48:58,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:58,374 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:48:58,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:58,403 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:48:58,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:48:58,526 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:48:58,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:48:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:58,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:48:58,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:48:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:58,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764077977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:58,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:58,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-22 09:48:58,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988420599] [2022-07-22 09:48:58,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:58,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:48:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:48:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:48:58,667 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-22 09:49:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:02,323 INFO L93 Difference]: Finished difference Result 1238 states and 1921 transitions. [2022-07-22 09:49:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-22 09:49:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2022-07-22 09:49:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:02,327 INFO L225 Difference]: With dead ends: 1238 [2022-07-22 09:49:02,327 INFO L226 Difference]: Without dead ends: 1236 [2022-07-22 09:49:02,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=6822, Unknown=0, NotChecked=0, Total=7656 [2022-07-22 09:49:02,329 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 289 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:02,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1317 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 09:49:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-07-22 09:49:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 196. [2022-07-22 09:49:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 146 states have (on average 1.3493150684931507) internal successors, (197), 148 states have internal predecessors, (197), 44 states have call successors, (44), 5 states have call predecessors, (44), 5 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-22 09:49:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 285 transitions. [2022-07-22 09:49:02,518 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 285 transitions. Word has length 79 [2022-07-22 09:49:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:02,519 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 285 transitions. [2022-07-22 09:49:02,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-22 09:49:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 285 transitions. [2022-07-22 09:49:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 09:49:02,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:02,520 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:02,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:02,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 09:49:02,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2022-07-22 09:49:02,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:02,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071878710] [2022-07-22 09:49:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:49:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:49:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:49:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:49:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:49:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:49:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:49:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:49:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:49:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071878710] [2022-07-22 09:49:02,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071878710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672059080] [2022-07-22 09:49:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:02,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:02,930 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:02,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:49:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:49:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:03,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:49:03,184 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:49:03,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:49:03,238 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:49:03,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:49:03,290 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:49:03,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:49:03,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:49:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 09:49:03,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:06,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:49:06,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:49:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:49:06,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672059080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:06,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:06,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-22 09:49:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920030886] [2022-07-22 09:49:06,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:49:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:49:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=928, Unknown=1, NotChecked=0, Total=1056 [2022-07-22 09:49:06,791 INFO L87 Difference]: Start difference. First operand 196 states and 285 transitions. Second operand has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-22 09:49:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:59,779 INFO L93 Difference]: Finished difference Result 1277 states and 1958 transitions. [2022-07-22 09:49:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-22 09:49:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2022-07-22 09:49:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:59,784 INFO L225 Difference]: With dead ends: 1277 [2022-07-22 09:49:59,784 INFO L226 Difference]: Without dead ends: 1275 [2022-07-22 09:49:59,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5833 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=1949, Invalid=13774, Unknown=27, NotChecked=0, Total=15750 [2022-07-22 09:49:59,789 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 697 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 1802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 6469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1802 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:59,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1730 Invalid, 6469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1802 Valid, 4309 Invalid, 0 Unknown, 358 Unchecked, 2.6s Time] [2022-07-22 09:49:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-07-22 09:49:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 230. [2022-07-22 09:49:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 170 states have (on average 1.3588235294117648) internal successors, (231), 172 states have internal predecessors, (231), 52 states have call successors, (52), 7 states have call predecessors, (52), 7 states have return successors, (52), 50 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-22 09:49:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 335 transitions. [2022-07-22 09:49:59,996 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 335 transitions. Word has length 79 [2022-07-22 09:49:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:59,996 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 335 transitions. [2022-07-22 09:49:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-22 09:49:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 335 transitions. [2022-07-22 09:49:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 09:49:59,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:59,997 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:00,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 09:50:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:00,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2022-07-22 09:50:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274586977] [2022-07-22 09:50:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:50:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:50:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:50:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:50:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:50:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:50:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:50:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:50:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:50:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274586977] [2022-07-22 09:50:00,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274586977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377058368] [2022-07-22 09:50:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:50:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:00,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:00,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:50:00,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:50:00,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:50:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:00,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:50:00,523 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:00,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:50:00,541 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:00,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:50:00,699 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:50:00,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:50:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:50:00,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:00,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:50:00,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:50:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:50:00,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377058368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:00,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:00,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2022-07-22 09:50:00,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841808493] [2022-07-22 09:50:00,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:00,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:50:00,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:50:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:50:00,840 INFO L87 Difference]: Start difference. First operand 230 states and 335 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 09:50:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:11,700 INFO L93 Difference]: Finished difference Result 4185 states and 6626 transitions. [2022-07-22 09:50:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-07-22 09:50:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2022-07-22 09:50:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:11,713 INFO L225 Difference]: With dead ends: 4185 [2022-07-22 09:50:11,714 INFO L226 Difference]: Without dead ends: 4183 [2022-07-22 09:50:11,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 169 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16079 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2956, Invalid=34874, Unknown=0, NotChecked=0, Total=37830 [2022-07-22 09:50:11,718 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 413 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 7025 mSolverCounterSat, 1885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 8910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1885 IncrementalHoareTripleChecker+Valid, 7025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2743 Invalid, 8910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1885 Valid, 7025 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-22 09:50:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2022-07-22 09:50:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 518. [2022-07-22 09:50:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 382 states have (on average 1.4083769633507854) internal successors, (538), 384 states have internal predecessors, (538), 128 states have call successors, (128), 7 states have call predecessors, (128), 7 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2022-07-22 09:50:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 794 transitions. [2022-07-22 09:50:12,350 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 794 transitions. Word has length 83 [2022-07-22 09:50:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:12,351 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 794 transitions. [2022-07-22 09:50:12,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 09:50:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 794 transitions. [2022-07-22 09:50:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 09:50:12,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:12,352 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:12,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 09:50:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 09:50:12,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1710261727, now seen corresponding path program 1 times [2022-07-22 09:50:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:12,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687759016] [2022-07-22 09:50:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:50:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:50:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:50:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:50:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:50:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:50:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:50:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:50:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:50:12,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:12,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687759016] [2022-07-22 09:50:12,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687759016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:12,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777461399] [2022-07-22 09:50:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:12,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:12,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:50:12,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:50:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:50:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:12,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:50:13,023 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:13,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:13,083 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:13,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:50:13,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:50:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 09:50:13,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:15,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:50:15,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:50:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:50:16,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777461399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:16,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:16,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-07-22 09:50:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604772449] [2022-07-22 09:50:16,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 09:50:16,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 09:50:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1119, Unknown=1, NotChecked=0, Total=1260 [2022-07-22 09:50:16,129 INFO L87 Difference]: Start difference. First operand 518 states and 794 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-22 09:52:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:18,667 INFO L93 Difference]: Finished difference Result 3132 states and 4896 transitions. [2022-07-22 09:52:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-07-22 09:52:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 83 [2022-07-22 09:52:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:18,679 INFO L225 Difference]: With dead ends: 3132 [2022-07-22 09:52:18,679 INFO L226 Difference]: Without dead ends: 3130 [2022-07-22 09:52:18,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13617 ImplicationChecksByTransitivity, 118.7s TimeCoverageRelationStatistics Valid=4356, Invalid=29613, Unknown=71, NotChecked=0, Total=34040 [2022-07-22 09:52:18,683 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 931 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 4964 mSolverCounterSat, 2821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 8343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2821 IncrementalHoareTripleChecker+Valid, 4964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:18,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 2364 Invalid, 8343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2821 Valid, 4964 Invalid, 0 Unknown, 558 Unchecked, 3.3s Time] [2022-07-22 09:52:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2022-07-22 09:52:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 518. [2022-07-22 09:52:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 382 states have (on average 1.3979057591623036) internal successors, (534), 384 states have internal predecessors, (534), 124 states have call successors, (124), 11 states have call predecessors, (124), 11 states have return successors, (124), 122 states have call predecessors, (124), 124 states have call successors, (124) [2022-07-22 09:52:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 782 transitions. [2022-07-22 09:52:19,235 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 782 transitions. Word has length 83 [2022-07-22 09:52:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:19,235 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 782 transitions. [2022-07-22 09:52:19,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-22 09:52:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 782 transitions. [2022-07-22 09:52:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 09:52:19,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:19,236 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:19,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:19,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 09:52:19,437 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1965057965, now seen corresponding path program 7 times [2022-07-22 09:52:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884287940] [2022-07-22 09:52:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:52:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:52:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:52:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:52:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:52:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:52:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:52:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:52:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:52:19,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884287940] [2022-07-22 09:52:19,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884287940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820212503] [2022-07-22 09:52:19,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:52:19,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:19,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:52:19,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:52:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:52:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:19,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:19,741 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:19,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:52:19,912 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:52:19,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:52:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:52:19,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:20,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-22 09:52:20,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-22 09:52:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:52:20,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820212503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:20,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-07-22 09:52:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69322631] [2022-07-22 09:52:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:20,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:52:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:52:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:52:20,060 INFO L87 Difference]: Start difference. First operand 518 states and 782 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 09:52:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:43,995 INFO L93 Difference]: Finished difference Result 10900 states and 17423 transitions. [2022-07-22 09:52:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-22 09:52:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 87 [2022-07-22 09:52:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:44,021 INFO L225 Difference]: With dead ends: 10900 [2022-07-22 09:52:44,021 INFO L226 Difference]: Without dead ends: 10898 [2022-07-22 09:52:44,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37574 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5012, Invalid=80544, Unknown=0, NotChecked=0, Total=85556 [2022-07-22 09:52:44,031 INFO L413 NwaCegarLoop]: 1022 mSDtfsCounter, 417 mSDsluCounter, 4005 mSDsCounter, 0 mSdLazyCounter, 14270 mSolverCounterSat, 2672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 5027 SdHoareTripleChecker+Invalid, 16942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2672 IncrementalHoareTripleChecker+Valid, 14270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:44,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 5027 Invalid, 16942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2672 Valid, 14270 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-07-22 09:52:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10898 states. [2022-07-22 09:52:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10898 to 1516. [2022-07-22 09:52:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1106 states have (on average 1.4448462929475587) internal successors, (1598), 1108 states have internal predecessors, (1598), 398 states have call successors, (398), 11 states have call predecessors, (398), 11 states have return successors, (398), 396 states have call predecessors, (398), 398 states have call successors, (398) [2022-07-22 09:52:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2394 transitions. [2022-07-22 09:52:45,979 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2394 transitions. Word has length 87 [2022-07-22 09:52:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:45,979 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 2394 transitions. [2022-07-22 09:52:45,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 09:52:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2394 transitions. [2022-07-22 09:52:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 09:52:45,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:45,982 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:45,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 09:52:46,184 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1305526443, now seen corresponding path program 1 times [2022-07-22 09:52:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:46,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930580826] [2022-07-22 09:52:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:52:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:52:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:52:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:52:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 09:52:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 09:52:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 09:52:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 09:52:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:52:46,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930580826] [2022-07-22 09:52:46,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930580826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061682260] [2022-07-22 09:52:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:46,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:46,376 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:52:46,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:52:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:52:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:46,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-22 09:52:46,701 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:52:46,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:52:46,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 21 proven. 88 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 09:52:46,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:47,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 09:52:47,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 09:52:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:52:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061682260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:47,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2022-07-22 09:52:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042474140] [2022-07-22 09:52:47,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:52:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:52:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:52:47,447 INFO L87 Difference]: Start difference. First operand 1516 states and 2394 transitions. Second operand has 39 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24)