./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-cav19/array_init_var_plus_ind2.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 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:54:12,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:54:12,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:54:12,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:54:12,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:54:12,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:54:12,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:54:12,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:54:12,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:54:12,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:54:12,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:54:12,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:54:12,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:54:12,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:54:12,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:54:12,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:54:12,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:54:12,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:54:12,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:54:12,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:54:12,714 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:54:12,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:54:12,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:54:12,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:54:12,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:54:12,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:54:12,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:54:12,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:54:12,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:54:12,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:54:12,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:54:12,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:54:12,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:54:12,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:54:12,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:54:12,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:54:12,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:54:12,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:54:12,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:54:12,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:54:12,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:54:12,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:54:12,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:54:12,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:54:12,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:54:12,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:54:12,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:54:12,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:54:12,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:54:12,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:54:12,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:54:12,765 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:54:12,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:54:12,766 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:54:12,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:54:12,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:54:12,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:54:12,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:54:12,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:54:12,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:54:12,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:54:12,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:54:12,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:54:12,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:54:12,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:54:12,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:54:12,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:54:12,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:54:12,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:54:12,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:54:12,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:54:12,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:54:12,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:54:12,772 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:54:12,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:54:12,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:54:12,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2022-07-20 21:54:13,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:54:13,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:54:13,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:54:13,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:54:13,033 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:54:13,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-07-20 21:54:13,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a570492e/f8988ae2cd084a37b2b8ef872d401ef0/FLAG522f7eb03 [2022-07-20 21:54:13,448 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:54:13,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-07-20 21:54:13,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a570492e/f8988ae2cd084a37b2b8ef872d401ef0/FLAG522f7eb03 [2022-07-20 21:54:13,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a570492e/f8988ae2cd084a37b2b8ef872d401ef0 [2022-07-20 21:54:13,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:54:13,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:54:13,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:54:13,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:54:13,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:54:13,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df16da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13, skipping insertion in model container [2022-07-20 21:54:13,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:54:13,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:54:13,642 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-cav19/array_init_var_plus_ind2.c[415,428] [2022-07-20 21:54:13,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:54:13,672 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:54:13,685 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-cav19/array_init_var_plus_ind2.c[415,428] [2022-07-20 21:54:13,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:54:13,705 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:54:13,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13 WrapperNode [2022-07-20 21:54:13,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:54:13,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:54:13,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:54:13,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:54:13,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,744 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-07-20 21:54:13,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:54:13,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:54:13,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:54:13,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:54:13,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:54:13,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:54:13,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:54:13,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:54:13,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (1/1) ... [2022-07-20 21:54:13,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:54:13,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:13,816 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) [2022-07-20 21:54:13,821 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 [2022-07-20 21:54:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:54:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:54:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:54:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:54:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:54:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:54:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:54:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:54:13,890 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:54:13,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:54:13,976 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:54:13,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:54:13,980 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:54:13,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:54:13 BoogieIcfgContainer [2022-07-20 21:54:13,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:54:13,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:54:13,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:54:14,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:54:14,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:54:13" (1/3) ... [2022-07-20 21:54:14,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e635675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:54:14, skipping insertion in model container [2022-07-20 21:54:14,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:54:13" (2/3) ... [2022-07-20 21:54:14,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e635675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:54:14, skipping insertion in model container [2022-07-20 21:54:14,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:54:13" (3/3) ... [2022-07-20 21:54:14,004 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2022-07-20 21:54:14,016 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:54:14,028 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:54:14,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:54:14,103 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@3b7b323c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6548b399 [2022-07-20 21:54:14,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:54:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2022-07-20 21:54:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 21:54:14,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:14,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:14,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-07-20 21:54:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805620584] [2022-07-20 21:54:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:14,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805620584] [2022-07-20 21:54:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805620584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:54:14,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:54:14,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:54:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284395616] [2022-07-20 21:54:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:54:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:54:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:54:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:54:14,262 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-20 21:54:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:14,280 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-20 21:54:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:54:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-20 21:54:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:14,289 INFO L225 Difference]: With dead ends: 27 [2022-07-20 21:54:14,289 INFO L226 Difference]: Without dead ends: 12 [2022-07-20 21:54:14,292 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 [2022-07-20 21:54:14,305 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2022-07-20 21:54:14,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:54:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-20 21:54:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-20 21:54:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-07-20 21:54:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-20 21:54:14,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-07-20 21:54:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:14,336 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-20 21:54:14,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-20 21:54:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-20 21:54:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 21:54:14,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:14,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:54:14,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-07-20 21:54:14,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:14,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734636503] [2022-07-20 21:54:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:14,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734636503] [2022-07-20 21:54:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734636503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:54:14,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:54:14,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:54:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785058518] [2022-07-20 21:54:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:54:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:54:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:54:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:54:14,478 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-20 21:54:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:14,518 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-20 21:54:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:54:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-07-20 21:54:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:14,519 INFO L225 Difference]: With dead ends: 29 [2022-07-20 21:54:14,520 INFO L226 Difference]: Without dead ends: 22 [2022-07-20 21:54:14,520 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 [2022-07-20 21:54:14,522 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:14,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:54:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-20 21:54:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-07-20 21:54:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-20 21:54:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-20 21:54:14,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-07-20 21:54:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:14,535 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-20 21:54:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-20 21:54:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-20 21:54:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 21:54:14,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:14,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:14,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:54:14,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-07-20 21:54:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838707913] [2022-07-20 21:54:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838707913] [2022-07-20 21:54:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838707913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:54:14,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:54:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:54:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679259482] [2022-07-20 21:54:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:54:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:54:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:54:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:54:14,622 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:54:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:14,656 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-20 21:54:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:54:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 21:54:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:14,658 INFO L225 Difference]: With dead ends: 23 [2022-07-20 21:54:14,658 INFO L226 Difference]: Without dead ends: 15 [2022-07-20 21:54:14,659 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 [2022-07-20 21:54:14,662 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:14,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:54:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-20 21:54:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-20 21:54:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-20 21:54:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-20 21:54:14,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-20 21:54:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:14,667 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-20 21:54:14,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:54:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-20 21:54:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 21:54:14,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:14,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:54:14,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-07-20 21:54:14,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:14,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959250331] [2022-07-20 21:54:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:14,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959250331] [2022-07-20 21:54:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959250331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:14,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657355282] [2022-07-20 21:54:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:14,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:14,767 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) [2022-07-20 21:54:14,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:54:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:54:14,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:14,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657355282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:14,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:14,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-07-20 21:54:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866300668] [2022-07-20 21:54:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:54:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:54:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:54:14,954 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-07-20 21:54:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:15,061 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-20 21:54:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:54:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 10 [2022-07-20 21:54:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:15,062 INFO L225 Difference]: With dead ends: 45 [2022-07-20 21:54:15,063 INFO L226 Difference]: Without dead ends: 36 [2022-07-20 21:54:15,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:54:15,066 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:15,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:54:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-20 21:54:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-07-20 21:54:15,074 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) [2022-07-20 21:54:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-20 21:54:15,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-07-20 21:54:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:15,076 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-20 21:54:15,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-07-20 21:54:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-20 21:54:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 21:54:15,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:15,078 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:15,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:54:15,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:15,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-07-20 21:54:15,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:15,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069021347] [2022-07-20 21:54:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:15,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:15,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069021347] [2022-07-20 21:54:15,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069021347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428143196] [2022-07-20 21:54:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:15,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:15,476 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) [2022-07-20 21:54:15,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:54:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:54:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:15,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:54:15,749 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 [2022-07-20 21:54:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:15,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:54:15,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-20 21:54:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:15,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428143196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:15,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:15,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-07-20 21:54:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565864942] [2022-07-20 21:54:15,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:54:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:54:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:54:15,950 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-07-20 21:54:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:16,089 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-20 21:54:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:54:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 14 [2022-07-20 21:54:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:16,090 INFO L225 Difference]: With dead ends: 37 [2022-07-20 21:54:16,091 INFO L226 Difference]: Without dead ends: 35 [2022-07-20 21:54:16,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:54:16,092 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:16,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-20 21:54:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-20 21:54:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-07-20 21:54:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-07-20 21:54:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-20 21:54:16,097 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-07-20 21:54:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:16,097 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-20 21:54:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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) [2022-07-20 21:54:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-20 21:54:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:54:16,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:16,098 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:16,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:16,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2022-07-20 21:54:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:16,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908624874] [2022-07-20 21:54:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908624874] [2022-07-20 21:54:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908624874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795741875] [2022-07-20 21:54:16,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:54:16,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:16,543 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) [2022-07-20 21:54:16,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:54:16,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:54:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:54:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:16,687 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 [2022-07-20 21:54:16,743 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:16,743 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 25 treesize of output 24 [2022-07-20 21:54:16,804 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 [2022-07-20 21:54:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:16,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:35,008 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 26 treesize of output 24 [2022-07-20 21:54:35,012 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 94 treesize of output 90 [2022-07-20 21:54:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:35,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795741875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:35,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:35,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-20 21:54:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659047206] [2022-07-20 21:54:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:35,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:54:35,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:54:35,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=424, Unknown=9, NotChecked=0, Total=506 [2022-07-20 21:54:35,177 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-07-20 21:54:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:35,512 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-07-20 21:54:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:54:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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 [2022-07-20 21:54:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:35,513 INFO L225 Difference]: With dead ends: 50 [2022-07-20 21:54:35,513 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 21:54:35,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=152, Invalid=831, Unknown=9, NotChecked=0, Total=992 [2022-07-20 21:54:35,515 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:35,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 140 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 171 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-20 21:54:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 21:54:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2022-07-20 21:54:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-07-20 21:54:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-20 21:54:35,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-20 21:54:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:35,520 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-20 21:54:35,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-07-20 21:54:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-20 21:54:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 21:54:35,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:35,521 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:35,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:35,722 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:35,722 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2022-07-20 21:54:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144029916] [2022-07-20 21:54:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:35,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144029916] [2022-07-20 21:54:35,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144029916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653385481] [2022-07-20 21:54:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:35,795 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) [2022-07-20 21:54:35,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:54:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:54:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:35,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:35,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653385481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:35,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:35,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 21:54:35,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584722960] [2022-07-20 21:54:35,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:54:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:35,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:54:35,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:54:35,920 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2022-07-20 21:54:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:35,960 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-07-20 21:54:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:54:35,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 18 [2022-07-20 21:54:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:35,962 INFO L225 Difference]: With dead ends: 38 [2022-07-20 21:54:35,962 INFO L226 Difference]: Without dead ends: 26 [2022-07-20 21:54:35,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:54:35,963 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:35,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:54:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-20 21:54:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-20 21:54:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2022-07-20 21:54:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-20 21:54:35,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-07-20 21:54:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:35,974 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-20 21:54:35,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2022-07-20 21:54:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-20 21:54:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 21:54:35,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:35,976 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:36,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:36,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:36,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2022-07-20 21:54:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959578063] [2022-07-20 21:54:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:36,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959578063] [2022-07-20 21:54:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959578063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272697090] [2022-07-20 21:54:36,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:54:36,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:36,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:36,280 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) [2022-07-20 21:54:36,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:54:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:54:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:54:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:36,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:36,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272697090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:36,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:36,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-07-20 21:54:36,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355120015] [2022-07-20 21:54:36,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:36,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:54:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:54:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:54:36,487 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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) [2022-07-20 21:54:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:36,626 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-20 21:54:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:54:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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 19 [2022-07-20 21:54:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:36,627 INFO L225 Difference]: With dead ends: 98 [2022-07-20 21:54:36,627 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 21:54:36,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:54:36,628 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:36,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:54:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 21:54:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2022-07-20 21:54:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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) [2022-07-20 21:54:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-20 21:54:36,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2022-07-20 21:54:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:36,635 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-20 21:54:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 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) [2022-07-20 21:54:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-20 21:54:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:54:36,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:36,636 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:36,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:36,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:36,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2022-07-20 21:54:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672314469] [2022-07-20 21:54:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:37,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672314469] [2022-07-20 21:54:37,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672314469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017611677] [2022-07-20 21:54:37,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:54:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:37,009 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) [2022-07-20 21:54:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:54:37,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:54:37,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:54:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:37,133 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 [2022-07-20 21:54:37,188 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:37,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:37,261 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:37,261 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 25 treesize of output 24 [2022-07-20 21:54:37,345 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 19 treesize of output 7 [2022-07-20 21:54:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:54:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:08,598 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (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_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) is different from false [2022-07-20 21:55:08,618 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 34 treesize of output 32 [2022-07-20 21:55:08,623 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 214 treesize of output 210 [2022-07-20 21:55:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-20 21:55:08,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017611677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:08,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:08,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-20 21:55:08,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225600192] [2022-07-20 21:55:08,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:08,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:55:08,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:55:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=630, Unknown=23, NotChecked=52, Total=812 [2022-07-20 21:55:08,879 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-07-20 21:55:10,918 WARN L833 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (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_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) (<= |c_ULTIMATE.start_main_~k~0#1| 0) (= (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|) 0) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|)))) is different from false [2022-07-20 21:55:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:11,222 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-07-20 21:55:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:55:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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 20 [2022-07-20 21:55:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:11,224 INFO L225 Difference]: With dead ends: 59 [2022-07-20 21:55:11,224 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 21:55:11,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=271, Invalid=1119, Unknown=24, NotChecked=146, Total=1560 [2022-07-20 21:55:11,225 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:11,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 127 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 247 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-07-20 21:55:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 21:55:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-07-20 21:55:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 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) [2022-07-20 21:55:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-07-20 21:55:11,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2022-07-20 21:55:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:11,233 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-07-20 21:55:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-07-20 21:55:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-07-20 21:55:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:55:11,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:11,234 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:11,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:11,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2022-07-20 21:55:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606066640] [2022-07-20 21:55:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606066640] [2022-07-20 21:55:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606066640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717931123] [2022-07-20 21:55:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:55:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:11,631 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) [2022-07-20 21:55:11,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:55:11,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:55:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:11,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:55:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:11,811 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 [2022-07-20 21:55:11,970 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 21:55:11,970 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 21 treesize of output 10 [2022-07-20 21:55:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:11,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:12,162 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 20 treesize of output 18 [2022-07-20 21:55:12,166 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 42 treesize of output 36 [2022-07-20 21:55:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:12,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717931123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:12,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:12,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-20 21:55:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342416727] [2022-07-20 21:55:12,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:55:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:55:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:55:12,374 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2022-07-20 21:55:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:12,574 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-20 21:55:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:55:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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 [2022-07-20 21:55:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:12,575 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:55:12,575 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 21:55:12,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 21:55:12,576 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:12,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-20 21:55:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 21:55:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-20 21:55:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2022-07-20 21:55:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-20 21:55:12,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2022-07-20 21:55:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:12,583 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-20 21:55:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2022-07-20 21:55:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-20 21:55:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 21:55:12,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:12,584 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:12,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:12,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:12,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2022-07-20 21:55:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:12,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435689301] [2022-07-20 21:55:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:12,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435689301] [2022-07-20 21:55:12,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435689301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424436739] [2022-07-20 21:55:12,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:55:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:12,987 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) [2022-07-20 21:55:12,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:55:13,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:55:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 21:55:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:13,182 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 [2022-07-20 21:55:13,241 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:55:13,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:55:13,365 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 [2022-07-20 21:55:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:13,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:15,563 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 29 treesize of output 27 [2022-07-20 21:55:15,566 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 232 treesize of output 224 [2022-07-20 21:55:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:15,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424436739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:15,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:15,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-20 21:55:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914130098] [2022-07-20 21:55:15,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:15,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:55:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:55:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:55:15,773 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2022-07-20 21:55:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:16,099 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-07-20 21:55:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:55:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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 24 [2022-07-20 21:55:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:16,100 INFO L225 Difference]: With dead ends: 60 [2022-07-20 21:55:16,100 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 21:55:16,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:55:16,101 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:16,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 185 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 337 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-20 21:55:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 21:55:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-07-20 21:55:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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) [2022-07-20 21:55:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-20 21:55:16,106 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2022-07-20 21:55:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:16,106 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-20 21:55:16,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2022-07-20 21:55:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-20 21:55:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:55:16,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:16,107 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:16,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:16,308 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,SelfDestructingSolverStorable10 [2022-07-20 21:55:16,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 4 times [2022-07-20 21:55:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419396127] [2022-07-20 21:55:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:16,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419396127] [2022-07-20 21:55:16,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419396127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115075274] [2022-07-20 21:55:16,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:55:16,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:16,528 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) [2022-07-20 21:55:16,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:55:16,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:55:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:55:16,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:16,702 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 [2022-07-20 21:55:16,765 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:16,765 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 25 treesize of output 24 [2022-07-20 21:55:16,835 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:16,836 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 25 treesize of output 24 [2022-07-20 21:55:16,950 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 [2022-07-20 21:55:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:55:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:49,592 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_67| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_66| |v_ULTIMATE.start_main_~i~0#1_67| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_67| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_175) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_178) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)))) is different from false [2022-07-20 21:55:49,604 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 34 treesize of output 32 [2022-07-20 21:55:49,609 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 3754 treesize of output 3690 [2022-07-20 21:55:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-20 21:55:55,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115075274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:55,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:55,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-20 21:55:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797588803] [2022-07-20 21:55:55,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:55:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:55:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1166, Unknown=25, NotChecked=70, Total=1406 [2022-07-20 21:55:55,848 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2022-07-20 21:55:57,915 WARN L833 $PredicateComparison]: unable to prove that (and (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_67| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_66| |v_ULTIMATE.start_main_~i~0#1_67| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_67| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_175) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_178) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)))) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) 0) (<= 1 |c_ULTIMATE.start_main_~j~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1| 1) 0)) is different from false [2022-07-20 21:56:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:00,413 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-20 21:56:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:56:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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 27 [2022-07-20 21:56:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:00,414 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:56:00,414 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 21:56:00,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=364, Invalid=2373, Unknown=27, NotChecked=206, Total=2970 [2022-07-20 21:56:00,415 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:00,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 248 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 489 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-07-20 21:56:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 21:56:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-07-20 21:56:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 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) [2022-07-20 21:56:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-20 21:56:00,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 27 [2022-07-20 21:56:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-20 21:56:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2022-07-20 21:56:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-20 21:56:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:56:00,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:00,423 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:00,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:00,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:00,640 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 5 times [2022-07-20 21:56:00,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:00,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859593268] [2022-07-20 21:56:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:00,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859593268] [2022-07-20 21:56:00,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859593268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619014101] [2022-07-20 21:56:00,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:56:00,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:00,935 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) [2022-07-20 21:56:00,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:56:00,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 21:56:00,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:00,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:56:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:01,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:56:01,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:56:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:01,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:56:01,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-20 21:56:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:01,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619014101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:01,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:01,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-07-20 21:56:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383659139] [2022-07-20 21:56:01,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 21:56:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 21:56:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:56:01,662 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-07-20 21:56:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:02,203 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-07-20 21:56:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:56:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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 28 [2022-07-20 21:56:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:02,204 INFO L225 Difference]: With dead ends: 68 [2022-07-20 21:56:02,205 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 21:56:02,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:56:02,206 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:02,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 205 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 287 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-07-20 21:56:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 21:56:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2022-07-20 21:56:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-07-20 21:56:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-20 21:56:02,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2022-07-20 21:56:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:02,213 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-20 21:56:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-07-20 21:56:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-20 21:56:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:56:02,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:02,214 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:02,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-20 21:56:02,427 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,SelfDestructingSolverStorable12 [2022-07-20 21:56:02,427 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 6 times [2022-07-20 21:56:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:02,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998787585] [2022-07-20 21:56:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998787585] [2022-07-20 21:56:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998787585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536760340] [2022-07-20 21:56:02,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:56:02,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:02,705 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) [2022-07-20 21:56:02,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:56:02,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:56:02,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:56:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:02,919 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 [2022-07-20 21:56:02,978 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:02,978 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 25 treesize of output 24 [2022-07-20 21:56:03,144 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 [2022-07-20 21:56:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:15,391 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 26 treesize of output 24 [2022-07-20 21:56:15,394 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 94 treesize of output 90 [2022-07-20 21:56:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:15,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536760340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:15,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:15,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-07-20 21:56:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872247157] [2022-07-20 21:56:15,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:15,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:56:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:56:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1500, Unknown=5, NotChecked=0, Total=1640 [2022-07-20 21:56:15,684 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 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) [2022-07-20 21:56:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:18,565 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-07-20 21:56:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:56:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 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 31 [2022-07-20 21:56:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:18,566 INFO L225 Difference]: With dead ends: 88 [2022-07-20 21:56:18,566 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 21:56:18,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=348, Invalid=3806, Unknown=6, NotChecked=0, Total=4160 [2022-07-20 21:56:18,568 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:18,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 382 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 465 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-07-20 21:56:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 21:56:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-07-20 21:56:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-07-20 21:56:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-20 21:56:18,575 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 31 [2022-07-20 21:56:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:18,576 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-20 21:56:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 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) [2022-07-20 21:56:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-20 21:56:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 21:56:18,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:18,577 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:18,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:56:18,779 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,SelfDestructingSolverStorable13 [2022-07-20 21:56:18,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1640133522, now seen corresponding path program 7 times [2022-07-20 21:56:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:18,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696312849] [2022-07-20 21:56:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:18,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696312849] [2022-07-20 21:56:18,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696312849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191816299] [2022-07-20 21:56:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:56:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:18,874 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) [2022-07-20 21:56:18,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:56:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:56:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:19,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:19,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191816299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:19,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:19,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:56:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249159605] [2022-07-20 21:56:19,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:56:19,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:56:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:56:19,047 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-07-20 21:56:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:19,108 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-07-20 21:56:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:56:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 32 [2022-07-20 21:56:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:19,109 INFO L225 Difference]: With dead ends: 71 [2022-07-20 21:56:19,109 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 21:56:19,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:56:19,110 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:19,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:56:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 21:56:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 21:56:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 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) [2022-07-20 21:56:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-20 21:56:19,118 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 32 [2022-07-20 21:56:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:19,118 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-20 21:56:19,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-07-20 21:56:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-20 21:56:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 21:56:19,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:19,119 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:19,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:19,323 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,SelfDestructingSolverStorable14 [2022-07-20 21:56:19,323 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1605814044, now seen corresponding path program 8 times [2022-07-20 21:56:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501562940] [2022-07-20 21:56:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:19,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501562940] [2022-07-20 21:56:19,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501562940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258394188] [2022-07-20 21:56:19,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:56:19,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:19,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:19,644 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) [2022-07-20 21:56:19,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:56:19,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:56:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 21:56:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:19,856 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 [2022-07-20 21:56:19,916 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:19,916 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 25 treesize of output 24 [2022-07-20 21:56:19,988 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:19,988 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 25 treesize of output 24 [2022-07-20 21:56:20,151 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 [2022-07-20 21:56:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:20,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:51,090 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_ArrVal_279 Int) (|v_ULTIMATE.start_main_~i~0#1_104| Int) (v_ArrVal_281 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_105| 1) |v_ULTIMATE.start_main_~i~0#1_104|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_105| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_279) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_104| 4)) v_ArrVal_281) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)) |v_ULTIMATE.start_main_~i~0#1_105| |v_ULTIMATE.start_main_~i~0#1_104|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_105|)))) is different from false [2022-07-20 21:56:51,098 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 34 treesize of output 32 [2022-07-20 21:56:51,101 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 450 treesize of output 442 [2022-07-20 21:56:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-20 21:56:51,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258394188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:51,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:51,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-20 21:56:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672481999] [2022-07-20 21:56:51,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:51,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:56:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:56:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1885, Unknown=24, NotChecked=88, Total=2162 [2022-07-20 21:56:51,519 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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) [2022-07-20 21:56:54,305 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (let ((.cse1 (+ 15 |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) .cse0))) (and (<= .cse0 12) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |c_ULTIMATE.start_main_~j~0#1|) (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= .cse1 (+ |c_ULTIMATE.start_main_~j~0#1| (* 3 |c_ULTIMATE.start_main_~i~0#1|))) (<= .cse1 (+ (* 2 |c_ULTIMATE.start_main_~i~0#1|) .cse2)) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_ArrVal_279 Int) (|v_ULTIMATE.start_main_~i~0#1_104| Int) (v_ArrVal_281 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_105| 1) |v_ULTIMATE.start_main_~i~0#1_104|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_105| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_279) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_104| 4)) v_ArrVal_281) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)) |v_ULTIMATE.start_main_~i~0#1_105| |v_ULTIMATE.start_main_~i~0#1_104|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_105|)))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 3 .cse2) (<= (+ 3 |c_ULTIMATE.start_main_~k~0#1|) 0)))) is different from false [2022-07-20 21:56:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:55,365 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-07-20 21:56:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 21:56:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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 34 [2022-07-20 21:56:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:55,366 INFO L225 Difference]: With dead ends: 75 [2022-07-20 21:56:55,366 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 21:56:55,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=573, Invalid=4521, Unknown=26, NotChecked=282, Total=5402 [2022-07-20 21:56:55,368 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:55,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 697 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-07-20 21:56:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 21:56:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2022-07-20 21:56:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-07-20 21:56:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-07-20 21:56:55,375 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 34 [2022-07-20 21:56:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:55,376 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-07-20 21:56:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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) [2022-07-20 21:56:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-07-20 21:56:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:56:55,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:55,377 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:55,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:55,583 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,SelfDestructingSolverStorable15 [2022-07-20 21:56:55,584 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:55,584 INFO L85 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 9 times [2022-07-20 21:56:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:55,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900016733] [2022-07-20 21:56:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900016733] [2022-07-20 21:56:55,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900016733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667414402] [2022-07-20 21:56:55,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:56:55,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:55,839 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) [2022-07-20 21:56:55,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:56:55,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 21:56:55,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:56:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:56,131 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 [2022-07-20 21:56:56,388 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 21:56:56,389 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 21 treesize of output 10 [2022-07-20 21:56:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:56,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:56,710 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 20 treesize of output 18 [2022-07-20 21:56:56,713 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 42 treesize of output 36 [2022-07-20 21:56:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:57,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667414402] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:57,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:57,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-20 21:56:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172793560] [2022-07-20 21:56:57,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:56:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:56:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1809, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:56:57,078 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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) [2022-07-20 21:56:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:57,399 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-07-20 21:56:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:56:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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 [2022-07-20 21:56:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:57,400 INFO L225 Difference]: With dead ends: 70 [2022-07-20 21:56:57,400 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 21:56:57,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=448, Invalid=2414, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:56:57,401 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:57,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 204 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 431 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-07-20 21:56:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 21:56:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-20 21:56:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-07-20 21:56:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-07-20 21:56:57,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 35 [2022-07-20 21:56:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:57,409 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-07-20 21:56:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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) [2022-07-20 21:56:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-07-20 21:56:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 21:56:57,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:57,410 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:57,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:57,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 10 times [2022-07-20 21:56:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:57,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478124561] [2022-07-20 21:56:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:57,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:57,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478124561] [2022-07-20 21:56:57,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478124561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185296749] [2022-07-20 21:56:57,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:56:57,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:57,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:57,898 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) [2022-07-20 21:56:57,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:56:57,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:56:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:56:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:58,176 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 [2022-07-20 21:56:58,241 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:58,241 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 25 treesize of output 24 [2022-07-20 21:56:58,452 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 [2022-07-20 21:56:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:56:58,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:57:24,726 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 26 treesize of output 24 [2022-07-20 21:57:24,729 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 94 treesize of output 90 [2022-07-20 21:57:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:57:25,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185296749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:57:25,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:57:25,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-07-20 21:57:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146496645] [2022-07-20 21:57:25,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:57:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:57:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:57:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:57:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2249, Unknown=13, NotChecked=0, Total=2450 [2022-07-20 21:57:25,134 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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) [2022-07-20 21:57:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:57:25,647 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-07-20 21:57:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:57:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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 38 [2022-07-20 21:57:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:57:25,648 INFO L225 Difference]: With dead ends: 76 [2022-07-20 21:57:25,648 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 21:57:25,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=264, Invalid=3029, Unknown=13, NotChecked=0, Total=3306 [2022-07-20 21:57:25,649 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:57:25,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 362 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 712 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-07-20 21:57:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 21:57:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2022-07-20 21:57:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 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) [2022-07-20 21:57:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-07-20 21:57:25,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 38 [2022-07-20 21:57:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:57:25,658 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-07-20 21:57:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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) [2022-07-20 21:57:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-07-20 21:57:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 21:57:25,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:57:25,659 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-20 21:57:25,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:57:25,879 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,SelfDestructingSolverStorable17 [2022-07-20 21:57:25,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:57:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:57:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 884864984, now seen corresponding path program 11 times [2022-07-20 21:57:25,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:57:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873144395] [2022-07-20 21:57:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:57:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:57:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:57:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:57:26,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:57:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873144395] [2022-07-20 21:57:26,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873144395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:57:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138374131] [2022-07-20 21:57:26,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:57:26,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:57:26,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:57:26,198 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) [2022-07-20 21:57:26,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:57:26,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:57:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:57:26,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:57:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:57:26,501 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 [2022-07-20 21:57:26,573 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:57:26,574 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 25 treesize of output 24 [2022-07-20 21:57:26,657 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:57:26,657 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 25 treesize of output 24 [2022-07-20 21:57:26,855 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 [2022-07-20 21:57:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:57:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates...