./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/condn.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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:15:51,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:15:51,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:15:51,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:15:51,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:15:51,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:15:51,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:15:51,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:15:51,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:15:51,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:15:51,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:15:51,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:15:51,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:15:51,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:15:51,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:15:51,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:15:51,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:15:51,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:15:51,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:15:51,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:15:51,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:15:51,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:15:51,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:15:51,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:15:51,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:15:51,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:15:51,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:15:51,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:15:51,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:15:51,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:15:51,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:15:51,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:15:51,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:15:51,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:15:51,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:15:51,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:15:51,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:15:51,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:15:51,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:15:51,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:15:51,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:15:51,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:15:51,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:15:51,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:15:51,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:15:51,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:15:51,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:15:51,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:15:51,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:15:51,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:15:51,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:15:51,790 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:15:51,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:15:51,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:15:51,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:15:51,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:15:51,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:15:51,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:15:51,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:15:51,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:15:51,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:15:51,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:15:51,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:15:51,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:15:51,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2022-07-11 23:15:52,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:15:52,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:15:52,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:15:52,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:15:52,036 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:15:52,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2022-07-11 23:15:52,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9006d06/269a3f8faf044bfe8776e5f926223eea/FLAG8daa1cbe2 [2022-07-11 23:15:52,389 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:15:52,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2022-07-11 23:15:52,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9006d06/269a3f8faf044bfe8776e5f926223eea/FLAG8daa1cbe2 [2022-07-11 23:15:52,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9006d06/269a3f8faf044bfe8776e5f926223eea [2022-07-11 23:15:52,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:15:52,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:15:52,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:15:52,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:15:52,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:15:52,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:15:52" (1/1) ... [2022-07-11 23:15:52,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9eabf8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:52, skipping insertion in model container [2022-07-11 23:15:52,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:15:52" (1/1) ... [2022-07-11 23:15:52,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:15:52,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:15:52,969 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-fpi/condn.c[588,601] [2022-07-11 23:15:52,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:15:52,996 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:15:53,005 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-fpi/condn.c[588,601] [2022-07-11 23:15:53,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:15:53,018 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:15:53,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53 WrapperNode [2022-07-11 23:15:53,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:15:53,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:15:53,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:15:53,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:15:53,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,048 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-07-11 23:15:53,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:15:53,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:15:53,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:15:53,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:15:53,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:15:53,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:15:53,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:15:53,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:15:53,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (1/1) ... [2022-07-11 23:15:53,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:15:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:53,093 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) [2022-07-11 23:15:53,117 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 [2022-07-11 23:15:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:15:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:15:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:15:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:15:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:15:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:15:53,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:15:53,169 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:15:53,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:15:53,266 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:15:53,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:15:53,271 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 23:15:53,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:15:53 BoogieIcfgContainer [2022-07-11 23:15:53,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:15:53,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:15:53,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:15:53,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:15:53,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:15:52" (1/3) ... [2022-07-11 23:15:53,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdfb4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:15:53, skipping insertion in model container [2022-07-11 23:15:53,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:15:53" (2/3) ... [2022-07-11 23:15:53,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdfb4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:15:53, skipping insertion in model container [2022-07-11 23:15:53,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:15:53" (3/3) ... [2022-07-11 23:15:53,281 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2022-07-11 23:15:53,291 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:15:53,292 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:15:53,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:15:53,348 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@4f5dcc67, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23241e93 [2022-07-11 23:15:53,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:15:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 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) [2022-07-11 23:15:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:15:53,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:53,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:53,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-07-11 23:15:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:53,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192131129] [2022-07-11 23:15:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:53,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:15:53,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192131129] [2022-07-11 23:15:53,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192131129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:15:53,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:15:53,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:15:53,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113538378] [2022-07-11 23:15:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:15:53,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:15:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:15:53,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:15:53,578 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-11 23:15:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:53,592 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-07-11 23:15:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:15:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-07-11 23:15:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:53,601 INFO L225 Difference]: With dead ends: 40 [2022-07-11 23:15:53,601 INFO L226 Difference]: Without dead ends: 18 [2022-07-11 23:15:53,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:15:53,610 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:53,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:15:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-11 23:15:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-11 23:15:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-07-11 23:15:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-11 23:15:53,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-07-11 23:15:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:53,635 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-11 23:15:53,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-11 23:15:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-11 23:15:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:15:53,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:53,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:15:53,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-07-11 23:15:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232008952] [2022-07-11 23:15:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:15:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232008952] [2022-07-11 23:15:53,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232008952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:15:53,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:15:53,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:15:53,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146093575] [2022-07-11 23:15:53,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:15:53,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:15:53,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:15:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:15:53,769 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-11 23:15:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:53,816 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-07-11 23:15:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:15:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-07-11 23:15:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:53,817 INFO L225 Difference]: With dead ends: 40 [2022-07-11 23:15:53,817 INFO L226 Difference]: Without dead ends: 29 [2022-07-11 23:15:53,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:15:53,818 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:53,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:15:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-11 23:15:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-07-11 23:15:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-07-11 23:15:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-11 23:15:53,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-07-11 23:15:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:53,824 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-11 23:15:53,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-11 23:15:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-11 23:15:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 23:15:53,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:53,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:53,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:15:53,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:53,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-07-11 23:15:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:53,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46335254] [2022-07-11 23:15:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:15:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:54,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46335254] [2022-07-11 23:15:54,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46335254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:54,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891356858] [2022-07-11 23:15:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:54,094 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) [2022-07-11 23:15:54,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:15:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:15:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:54,296 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 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-11 23:15:54,345 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 9 [2022-07-11 23:15:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:15:54,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:54,550 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 37 treesize of output 31 [2022-07-11 23:15:54,567 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:15:54,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 32 [2022-07-11 23:15:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:15:54,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891356858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:54,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:54,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-07-11 23:15:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224068441] [2022-07-11 23:15:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:15:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:15:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:15:54,586 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-11 23:15:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:54,831 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-07-11 23:15:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:15:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 17 [2022-07-11 23:15:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:54,835 INFO L225 Difference]: With dead ends: 47 [2022-07-11 23:15:54,835 INFO L226 Difference]: Without dead ends: 45 [2022-07-11 23:15:54,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:15:54,842 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:54,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 122 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-11 23:15:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-11 23:15:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2022-07-11 23:15:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-07-11 23:15:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-11 23:15:54,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-07-11 23:15:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:54,857 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-11 23:15:54,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-11 23:15:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-11 23:15:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 23:15:54,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:54,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:54,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:55,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2022-07-11 23:15:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:55,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578167302] [2022-07-11 23:15:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:15:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578167302] [2022-07-11 23:15:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578167302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282263249] [2022-07-11 23:15:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:55,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:15:55,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:15:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:55,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:15:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:15:55,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:15:55,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282263249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:55,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:55,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:15:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199416941] [2022-07-11 23:15:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:55,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:15:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:15:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:15:55,259 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-07-11 23:15:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:55,371 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-07-11 23:15:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:15:55,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 21 [2022-07-11 23:15:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:55,373 INFO L225 Difference]: With dead ends: 62 [2022-07-11 23:15:55,373 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:15:55,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:15:55,377 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:15:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:15:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-07-11 23:15:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2022-07-11 23:15:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-11 23:15:55,394 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-11 23:15:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:55,394 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-11 23:15:55,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-07-11 23:15:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-11 23:15:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 23:15:55,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:55,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:55,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:15:55,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2022-07-11 23:15:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:55,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718750934] [2022-07-11 23:15:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:15:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718750934] [2022-07-11 23:15:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718750934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908620148] [2022-07-11 23:15:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:15:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:55,843 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) [2022-07-11 23:15:55,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:15:55,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:15:55,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:15:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 23:15:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:55,934 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:15:55,997 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 21 treesize of output 9 [2022-07-11 23:15:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:15:56,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:56,110 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 39 treesize of output 33 [2022-07-11 23:15:56,120 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:15:56,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-11 23:15:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:15:56,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908620148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:56,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:56,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 22 [2022-07-11 23:15:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517373761] [2022-07-11 23:15:56,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:56,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:15:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:15:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:15:56,136 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-07-11 23:15:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:56,616 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-07-11 23:15:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 23:15:56,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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 26 [2022-07-11 23:15:56,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:56,617 INFO L225 Difference]: With dead ends: 61 [2022-07-11 23:15:56,617 INFO L226 Difference]: Without dead ends: 59 [2022-07-11 23:15:56,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 23:15:56,618 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:56,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 290 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-07-11 23:15:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-11 23:15:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2022-07-11 23:15:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2022-07-11 23:15:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-11 23:15:56,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2022-07-11 23:15:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:56,622 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-11 23:15:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-07-11 23:15:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-11 23:15:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:15:56,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:56,623 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:56,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:56,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2022-07-11 23:15:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38751958] [2022-07-11 23:15:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:15:56,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38751958] [2022-07-11 23:15:56,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38751958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590914783] [2022-07-11 23:15:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:15:56,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:56,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:56,908 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) [2022-07-11 23:15:56,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:15:56,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:15:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:15:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:15:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:15:57,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:15:57,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590914783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:57,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:57,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-11 23:15:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340933439] [2022-07-11 23:15:57,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:15:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:15:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:15:57,111 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-07-11 23:15:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:57,229 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-07-11 23:15:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:15:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 30 [2022-07-11 23:15:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:57,231 INFO L225 Difference]: With dead ends: 82 [2022-07-11 23:15:57,231 INFO L226 Difference]: Without dead ends: 47 [2022-07-11 23:15:57,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:15:57,232 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:57,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:15:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-11 23:15:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-07-11 23:15:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-07-11 23:15:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-07-11 23:15:57,236 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-07-11 23:15:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-07-11 23:15:57,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-07-11 23:15:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-07-11 23:15:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 23:15:57,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:57,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:57,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:57,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2022-07-11 23:15:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417182219] [2022-07-11 23:15:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:15:57,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417182219] [2022-07-11 23:15:57,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417182219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674289463] [2022-07-11 23:15:57,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:15:57,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:57,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:57,780 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) [2022-07-11 23:15:57,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:15:57,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:15:57,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:15:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:15:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:57,902 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-07-11 23:15:57,994 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 [2022-07-11 23:15:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:15:58,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:58,122 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 39 treesize of output 33 [2022-07-11 23:15:58,131 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:15:58,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-11 23:15:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:15:58,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674289463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:58,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:58,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 31 [2022-07-11 23:15:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609068226] [2022-07-11 23:15:58,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-11 23:15:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-11 23:15:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-07-11 23:15:58,161 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 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) [2022-07-11 23:15:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:59,039 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-11 23:15:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-11 23:15:59,039 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 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 35 [2022-07-11 23:15:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:59,040 INFO L225 Difference]: With dead ends: 75 [2022-07-11 23:15:59,040 INFO L226 Difference]: Without dead ends: 73 [2022-07-11 23:15:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2022-07-11 23:15:59,042 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 146 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 557 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-07-11 23:15:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-11 23:15:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-07-11 23:15:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-07-11 23:15:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-11 23:15:59,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2022-07-11 23:15:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:59,047 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-11 23:15:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 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) [2022-07-11 23:15:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-11 23:15:59,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:15:59,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:59,048 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:59,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:59,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:59,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2022-07-11 23:15:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:59,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679988078] [2022-07-11 23:15:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:15:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:15:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:15:59,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679988078] [2022-07-11 23:15:59,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679988078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:15:59,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251237394] [2022-07-11 23:15:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:15:59,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:59,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:15:59,332 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) [2022-07-11 23:15:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:15:59,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 23:15:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:15:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:15:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:15:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:15:59,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:15:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:15:59,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251237394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:15:59,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:15:59,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-11 23:15:59,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148219872] [2022-07-11 23:15:59,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:15:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 23:15:59,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:15:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 23:15:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:15:59,525 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2022-07-11 23:15:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:15:59,642 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-07-11 23:15:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:15:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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 39 [2022-07-11 23:15:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:15:59,643 INFO L225 Difference]: With dead ends: 102 [2022-07-11 23:15:59,643 INFO L226 Difference]: Without dead ends: 56 [2022-07-11 23:15:59,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:15:59,644 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:15:59,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 74 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:15:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-11 23:15:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-07-11 23:15:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 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) [2022-07-11 23:15:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-07-11 23:15:59,648 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2022-07-11 23:15:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:15:59,648 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-07-11 23:15:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2022-07-11 23:15:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-07-11 23:15:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:15:59,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:15:59,649 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:15:59,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:15:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:15:59,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:15:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:15:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2022-07-11 23:15:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:15:59,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359060260] [2022-07-11 23:15:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:15:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:15:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:00,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359060260] [2022-07-11 23:16:00,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359060260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476629408] [2022-07-11 23:16:00,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:16:00,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:00,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:00,159 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) [2022-07-11 23:16:00,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:16:00,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:16:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 23:16:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:00,301 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:16:00,564 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:16:00,565 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 23 treesize of output 10 [2022-07-11 23:16:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:16:00,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:00,930 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 74 treesize of output 64 [2022-07-11 23:16:00,935 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-11 23:16:00,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 116 treesize of output 80 [2022-07-11 23:16:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:16:00,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476629408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:00,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:00,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2022-07-11 23:16:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397655124] [2022-07-11 23:16:00,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:00,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-11 23:16:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-11 23:16:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-07-11 23:16:00,951 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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) [2022-07-11 23:16:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:01,685 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-07-11 23:16:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-11 23:16:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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 44 [2022-07-11 23:16:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:01,685 INFO L225 Difference]: With dead ends: 102 [2022-07-11 23:16:01,685 INFO L226 Difference]: Without dead ends: 67 [2022-07-11 23:16:01,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=733, Invalid=4379, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 23:16:01,689 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:01,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 179 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 156 Invalid, 0 Unknown, 191 Unchecked, 0.1s Time] [2022-07-11 23:16:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-11 23:16:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-07-11 23:16:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-07-11 23:16:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-11 23:16:01,705 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 44 [2022-07-11 23:16:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:01,705 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-11 23:16:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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) [2022-07-11 23:16:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-11 23:16:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:16:01,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:01,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:01,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:01,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:01,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash -30911050, now seen corresponding path program 1 times [2022-07-11 23:16:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130103931] [2022-07-11 23:16:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130103931] [2022-07-11 23:16:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130103931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013493389] [2022-07-11 23:16:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:02,212 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) [2022-07-11 23:16:02,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:16:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 23:16:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:02,328 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-07-11 23:16:02,429 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 [2022-07-11 23:16:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:16:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:02,573 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 39 treesize of output 33 [2022-07-11 23:16:02,576 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:16:02,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-11 23:16:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:16:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013493389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:02,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:02,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 37 [2022-07-11 23:16:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491143409] [2022-07-11 23:16:02,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 23:16:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 23:16:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 23:16:02,603 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 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) [2022-07-11 23:16:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:03,669 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-07-11 23:16:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-11 23:16:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 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 44 [2022-07-11 23:16:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:03,671 INFO L225 Difference]: With dead ends: 101 [2022-07-11 23:16:03,672 INFO L226 Difference]: Without dead ends: 99 [2022-07-11 23:16:03,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=5340, Unknown=0, NotChecked=0, Total=6162 [2022-07-11 23:16:03,674 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 201 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:03,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 199 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 751 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-11 23:16:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-11 23:16:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2022-07-11 23:16:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:16:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-11 23:16:03,686 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 44 [2022-07-11 23:16:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:03,687 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-11 23:16:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 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) [2022-07-11 23:16:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-11 23:16:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:16:03,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:03,688 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:03,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:03,897 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,SelfDestructingSolverStorable9 [2022-07-11 23:16:03,898 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1793623532, now seen corresponding path program 2 times [2022-07-11 23:16:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834928356] [2022-07-11 23:16:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:16:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834928356] [2022-07-11 23:16:03,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834928356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899431703] [2022-07-11 23:16:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:16:03,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:03,978 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) [2022-07-11 23:16:03,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:16:04,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:16:04,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:16:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:16:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:16:04,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899431703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:04,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:04,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-11 23:16:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327661748] [2022-07-11 23:16:04,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 23:16:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 23:16:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:16:04,211 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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) [2022-07-11 23:16:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:04,373 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2022-07-11 23:16:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:16:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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 48 [2022-07-11 23:16:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:04,374 INFO L225 Difference]: With dead ends: 144 [2022-07-11 23:16:04,374 INFO L226 Difference]: Without dead ends: 76 [2022-07-11 23:16:04,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-11 23:16:04,379 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:04,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 103 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:16:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-11 23:16:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2022-07-11 23:16:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2022-07-11 23:16:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-11 23:16:04,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 48 [2022-07-11 23:16:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:04,388 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-11 23:16:04,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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) [2022-07-11 23:16:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-11 23:16:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 23:16:04,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:04,391 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:04,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:04,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 7 times [2022-07-11 23:16:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509860347] [2022-07-11 23:16:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509860347] [2022-07-11 23:16:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509860347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:04,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290960104] [2022-07-11 23:16:04,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:16:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:04,950 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) [2022-07-11 23:16:04,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:16:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 23:16:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:05,060 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:16:05,226 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 21 treesize of output 9 [2022-07-11 23:16:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:16:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:05,424 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 39 treesize of output 33 [2022-07-11 23:16:05,428 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:16:05,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-11 23:16:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:16:05,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290960104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:05,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:05,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 15] total 37 [2022-07-11 23:16:05,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663357994] [2022-07-11 23:16:05,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:05,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 23:16:05,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 23:16:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 23:16:05,456 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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) [2022-07-11 23:16:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:06,838 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2022-07-11 23:16:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-11 23:16:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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 53 [2022-07-11 23:16:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:06,839 INFO L225 Difference]: With dead ends: 103 [2022-07-11 23:16:06,839 INFO L226 Difference]: Without dead ends: 101 [2022-07-11 23:16:06,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=835, Invalid=5645, Unknown=0, NotChecked=0, Total=6480 [2022-07-11 23:16:06,841 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:06,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 236 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1006 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2022-07-11 23:16:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-11 23:16:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2022-07-11 23:16:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-07-11 23:16:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-07-11 23:16:06,847 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 53 [2022-07-11 23:16:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:06,847 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-07-11 23:16:06,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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) [2022-07-11 23:16:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-07-11 23:16:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:16:06,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:06,848 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:06,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:07,065 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,SelfDestructingSolverStorable11 [2022-07-11 23:16:07,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1202327990, now seen corresponding path program 8 times [2022-07-11 23:16:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:07,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100027230] [2022-07-11 23:16:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:16:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:07,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100027230] [2022-07-11 23:16:07,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100027230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:07,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843300464] [2022-07-11 23:16:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:16:07,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:07,153 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) [2022-07-11 23:16:07,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:16:07,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:16:07,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:16:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:16:07,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-11 23:16:07,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843300464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:07,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:07,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-11 23:16:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970389524] [2022-07-11 23:16:07,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 23:16:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 23:16:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:16:07,431 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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) [2022-07-11 23:16:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:07,598 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2022-07-11 23:16:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 23:16:07,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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 57 [2022-07-11 23:16:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:07,598 INFO L225 Difference]: With dead ends: 142 [2022-07-11 23:16:07,598 INFO L226 Difference]: Without dead ends: 74 [2022-07-11 23:16:07,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:16:07,599 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:07,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 107 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:16:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-11 23:16:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2022-07-11 23:16:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 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) [2022-07-11 23:16:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-07-11 23:16:07,605 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 57 [2022-07-11 23:16:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:07,605 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-07-11 23:16:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 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) [2022-07-11 23:16:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-07-11 23:16:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:16:07,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:07,605 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:07,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:07,819 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,SelfDestructingSolverStorable12 [2022-07-11 23:16:07,819 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 9 times [2022-07-11 23:16:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:07,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816607951] [2022-07-11 23:16:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816607951] [2022-07-11 23:16:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816607951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528533823] [2022-07-11 23:16:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:16:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:08,176 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) [2022-07-11 23:16:08,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:16:08,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-11 23:16:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 23:16:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:08,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:16:08,925 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:16:08,929 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 23 treesize of output 10 [2022-07-11 23:16:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:16:08,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:09,504 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 74 treesize of output 64 [2022-07-11 23:16:09,509 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-11 23:16:09,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 116 treesize of output 80 [2022-07-11 23:16:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:16:09,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528533823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:09,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:09,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 19] total 54 [2022-07-11 23:16:09,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536602083] [2022-07-11 23:16:09,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:09,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-11 23:16:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-11 23:16:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2524, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 23:16:09,534 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 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) [2022-07-11 23:16:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:10,728 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-07-11 23:16:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 23:16:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 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 62 [2022-07-11 23:16:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:10,729 INFO L225 Difference]: With dead ends: 108 [2022-07-11 23:16:10,729 INFO L226 Difference]: Without dead ends: 80 [2022-07-11 23:16:10,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1100, Invalid=7642, Unknown=0, NotChecked=0, Total=8742 [2022-07-11 23:16:10,731 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:10,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 269 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 362 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-07-11 23:16:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-11 23:16:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-07-11 23:16:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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) [2022-07-11 23:16:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-11 23:16:10,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 62 [2022-07-11 23:16:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:10,737 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-11 23:16:10,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 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) [2022-07-11 23:16:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-11 23:16:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:16:10,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:10,738 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:10,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:10,938 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,SelfDestructingSolverStorable13 [2022-07-11 23:16:10,938 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1996145506, now seen corresponding path program 3 times [2022-07-11 23:16:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:10,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763477241] [2022-07-11 23:16:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763477241] [2022-07-11 23:16:11,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763477241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288555610] [2022-07-11 23:16:11,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:16:11,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:11,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:11,258 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) [2022-07-11 23:16:11,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:16:11,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-11 23:16:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 23:16:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:11,461 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 15 treesize of output 11 [2022-07-11 23:16:11,873 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:16:11,874 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 23 treesize of output 10 [2022-07-11 23:16:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:16:11,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:12,900 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 39 treesize of output 35 [2022-07-11 23:16:12,902 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 75 treesize of output 63 [2022-07-11 23:16:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:16:12,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288555610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:12,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:12,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 51 [2022-07-11 23:16:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559578799] [2022-07-11 23:16:12,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-11 23:16:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-11 23:16:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2239, Unknown=1, NotChecked=0, Total=2550 [2022-07-11 23:16:12,920 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 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) [2022-07-11 23:16:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:13,942 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-07-11 23:16:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-11 23:16:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 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 62 [2022-07-11 23:16:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:13,943 INFO L225 Difference]: With dead ends: 107 [2022-07-11 23:16:13,943 INFO L226 Difference]: Without dead ends: 79 [2022-07-11 23:16:13,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=790, Invalid=5689, Unknown=1, NotChecked=0, Total=6480 [2022-07-11 23:16:13,947 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:13,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 376 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 882 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-07-11 23:16:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-11 23:16:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2022-07-11 23:16:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 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) [2022-07-11 23:16:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-07-11 23:16:13,957 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 62 [2022-07-11 23:16:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:13,957 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-07-11 23:16:13,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 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) [2022-07-11 23:16:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-07-11 23:16:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:16:13,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:13,958 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:13,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:14,175 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,SelfDestructingSolverStorable14 [2022-07-11 23:16:14,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1793306100, now seen corresponding path program 10 times [2022-07-11 23:16:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774784974] [2022-07-11 23:16:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:16:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774784974] [2022-07-11 23:16:14,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774784974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409536388] [2022-07-11 23:16:14,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:16:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:14,279 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) [2022-07-11 23:16:14,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:16:14,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:16:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 23:16:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:16:14,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:16:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:16:14,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409536388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:16:14,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:16:14,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-11 23:16:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888609957] [2022-07-11 23:16:14,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:16:14,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 23:16:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:16:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 23:16:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:16:14,519 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2022-07-11 23:16:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:16:14,692 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2022-07-11 23:16:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 23:16:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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 65 [2022-07-11 23:16:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:16:14,693 INFO L225 Difference]: With dead ends: 133 [2022-07-11 23:16:14,693 INFO L226 Difference]: Without dead ends: 85 [2022-07-11 23:16:14,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:16:14,693 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:16:14,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 69 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:16:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-11 23:16:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2022-07-11 23:16:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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) [2022-07-11 23:16:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-11 23:16:14,700 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 65 [2022-07-11 23:16:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:16:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-11 23:16:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2022-07-11 23:16:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-11 23:16:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:16:14,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:16:14,700 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:16:14,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:16:14,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:14,903 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:16:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:16:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1739949134, now seen corresponding path program 11 times [2022-07-11 23:16:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:16:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957996135] [2022-07-11 23:16:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:16:14,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:16:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:16:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:16:15,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:16:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957996135] [2022-07-11 23:16:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957996135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:16:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215998216] [2022-07-11 23:16:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:16:15,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:16:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:16:15,386 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) [2022-07-11 23:16:15,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:16:15,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-11 23:16:15,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:16:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-11 23:16:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:16:15,622 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:16:15,692 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:16:15,692 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 27 treesize of output 26 [2022-07-11 23:16:15,870 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 23 treesize of output 7 [2022-07-11 23:16:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:16:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:11,347 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 46 treesize of output 40 [2022-07-11 23:17:11,352 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:17:11,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 260 treesize of output 198 [2022-07-11 23:17:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:17:11,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215998216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:11,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:17:11,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 19] total 48 [2022-07-11 23:17:11,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256810942] [2022-07-11 23:17:11,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:11,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 23:17:11,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 23:17:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2003, Unknown=33, NotChecked=0, Total=2256 [2022-07-11 23:17:11,426 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-07-11 23:17:15,684 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_276|)) (forall ((v_ArrVal_559 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_276| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_559) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)))) (or (<= (+ (select .cse0 (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) c_~N~0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5))) is different from false [2022-07-11 23:17:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:15,862 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-07-11 23:17:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-11 23:17:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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 67 [2022-07-11 23:17:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:15,865 INFO L225 Difference]: With dead ends: 156 [2022-07-11 23:17:15,865 INFO L226 Difference]: Without dead ends: 154 [2022-07-11 23:17:15,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 59.7s TimeCoverageRelationStatistics Valid=1067, Invalid=13423, Unknown=34, NotChecked=238, Total=14762 [2022-07-11 23:17:15,867 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:15,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 478 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1332 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-07-11 23:17:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-11 23:17:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 76. [2022-07-11 23:17:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 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) [2022-07-11 23:17:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-11 23:17:15,879 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 67 [2022-07-11 23:17:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:15,880 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-11 23:17:15,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-07-11 23:17:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-11 23:17:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:17:15,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:15,881 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:15,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:16,106 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,SelfDestructingSolverStorable16 [2022-07-11 23:17:16,106 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash -631790128, now seen corresponding path program 4 times [2022-07-11 23:17:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045329836] [2022-07-11 23:17:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:17:16,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045329836] [2022-07-11 23:17:16,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045329836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:17:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445846898] [2022-07-11 23:17:16,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:17:16,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:16,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:16,710 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) [2022-07-11 23:17:16,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 23:17:16,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:17:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:17:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-11 23:17:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:16,849 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:17:16,934 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:17:16,934 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 27 treesize of output 26 [2022-07-11 23:17:17,135 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 23 treesize of output 7 [2022-07-11 23:17:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:17:17,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:17,640 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 46 treesize of output 40 [2022-07-11 23:18:17,645 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:18:17,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 124 treesize of output 90 [2022-07-11 23:18:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 116 refuted. 4 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:18:17,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445846898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:17,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:18:17,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 19] total 48 [2022-07-11 23:18:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213498943] [2022-07-11 23:18:17,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:17,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 23:18:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 23:18:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1995, Unknown=41, NotChecked=0, Total=2256 [2022-07-11 23:18:17,694 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-07-11 23:18:28,016 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (or (<= (+ (select .cse0 (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) c_~N~0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_301| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_301|)) (forall ((v_ArrVal_623 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_301| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_623) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)))) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5))) is different from false [2022-07-11 23:18:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:28,220 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2022-07-11 23:18:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-11 23:18:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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 67 [2022-07-11 23:18:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:28,221 INFO L225 Difference]: With dead ends: 183 [2022-07-11 23:18:28,221 INFO L226 Difference]: Without dead ends: 181 [2022-07-11 23:18:28,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=1113, Invalid=13848, Unknown=49, NotChecked=242, Total=15252 [2022-07-11 23:18:28,223 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 167 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:28,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 843 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1684 Invalid, 0 Unknown, 247 Unchecked, 0.6s Time] [2022-07-11 23:18:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-11 23:18:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 76. [2022-07-11 23:18:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 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) [2022-07-11 23:18:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-11 23:18:28,234 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 67 [2022-07-11 23:18:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:28,234 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-11 23:18:28,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-07-11 23:18:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-11 23:18:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:18:28,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:28,235 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:28,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:28,439 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,SelfDestructingSolverStorable17 [2022-07-11 23:18:28,439 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1959907106, now seen corresponding path program 12 times [2022-07-11 23:18:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612769841] [2022-07-11 23:18:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:18:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:18:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:28,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612769841] [2022-07-11 23:18:28,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612769841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:18:28,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254204758] [2022-07-11 23:18:28,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:18:28,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:28,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:28,594 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) [2022-07-11 23:18:28,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 23:18:28,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-11 23:18:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:18:28,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:18:28,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-11 23:18:28,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254204758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:28,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:18:28,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-11 23:18:28,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116842794] [2022-07-11 23:18:28,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:28,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 23:18:28,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:28,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 23:18:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:18:28,956 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 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) [2022-07-11 23:18:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:29,196 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2022-07-11 23:18:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-11 23:18:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 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 70 [2022-07-11 23:18:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:29,197 INFO L225 Difference]: With dead ends: 180 [2022-07-11 23:18:29,197 INFO L226 Difference]: Without dead ends: 149 [2022-07-11 23:18:29,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 23:18:29,198 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 341 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:29,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 143 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:18:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-11 23:18:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2022-07-11 23:18:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 122 states have internal predecessors, (142), 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) [2022-07-11 23:18:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2022-07-11 23:18:29,214 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 70 [2022-07-11 23:18:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:29,214 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2022-07-11 23:18:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 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) [2022-07-11 23:18:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2022-07-11 23:18:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:18:29,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:29,215 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:29,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:29,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:29,424 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 13 times [2022-07-11 23:18:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864010151] [2022-07-11 23:18:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:18:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:18:29,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864010151] [2022-07-11 23:18:29,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864010151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:18:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636139049] [2022-07-11 23:18:29,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:18:29,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:29,847 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) [2022-07-11 23:18:29,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 23:18:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:18:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 23:18:29,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:29,980 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:18:30,189 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 21 treesize of output 9 [2022-07-11 23:18:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:18:30,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:18:30,455 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 39 treesize of output 33 [2022-07-11 23:18:30,458 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-11 23:18:30,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 58 treesize of output 36 [2022-07-11 23:18:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-11 23:18:30,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636139049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:18:30,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:18:30,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 47 [2022-07-11 23:18:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447466749] [2022-07-11 23:18:30,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:18:30,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-11 23:18:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:18:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-11 23:18:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 23:18:30,496 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 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) [2022-07-11 23:18:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:18:32,662 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-07-11 23:18:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-11 23:18:32,662 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 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 71 [2022-07-11 23:18:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:18:32,663 INFO L225 Difference]: With dead ends: 223 [2022-07-11 23:18:32,663 INFO L226 Difference]: Without dead ends: 136 [2022-07-11 23:18:32,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1164, Invalid=9756, Unknown=0, NotChecked=0, Total=10920 [2022-07-11 23:18:32,667 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:18:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 419 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1864 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-07-11 23:18:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-11 23:18:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2022-07-11 23:18:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 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) [2022-07-11 23:18:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-07-11 23:18:32,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 71 [2022-07-11 23:18:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-07-11 23:18:32,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 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) [2022-07-11 23:18:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-07-11 23:18:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-11 23:18:32,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:32,681 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:32,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:32,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:32,881 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:32,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:32,882 INFO L85 PathProgramCache]: Analyzing trace with hash 858003420, now seen corresponding path program 14 times [2022-07-11 23:18:32,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:32,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843547220] [2022-07-11 23:18:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:18:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 1 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:18:33,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:18:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843547220] [2022-07-11 23:18:33,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843547220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:18:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195539639] [2022-07-11 23:18:33,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:18:33,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:33,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:33,442 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:18:33,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-11 23:18:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:18:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:18:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:18:33,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:18:33,600 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 0 case distinctions, treesize of input 38 treesize of output 18 [2022-07-11 23:18:33,690 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:18:33,690 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 27 treesize of output 26 [2022-07-11 23:18:33,751 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:18:33,751 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 27 treesize of output 26 [2022-07-11 23:18:33,927 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 23 treesize of output 7 [2022-07-11 23:18:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 23:18:33,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:19:55,038 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_392| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_391| Int) (v_ArrVal_823 Int) (v_ArrVal_822 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_392| 4)) v_ArrVal_822) (+ (* |v_ULTIMATE.start_main_~i~0#1_391| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_823) (+ 20 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_392| 1) |v_ULTIMATE.start_main_~i~0#1_391|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_392|)))) is different from false