./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loop-acceleration/array_2-2-simple.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:56:20,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:56:20,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:56:20,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:56:20,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:56:20,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:56:20,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:56:20,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:56:20,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:56:20,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:56:20,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:56:20,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:56:20,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:56:20,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:56:20,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:56:20,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:56:20,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:56:20,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:56:20,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:56:20,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:56:20,686 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:56:20,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:56:20,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:56:20,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:56:20,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:56:20,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:56:20,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:56:20,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:56:20,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:56:20,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:56:20,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:56:20,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:56:20,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:56:20,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:56:20,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:56:20,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:56:20,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:56:20,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:56:20,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:56:20,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:56:20,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:56:20,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:56:20,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:56:20,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:56:20,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:56:20,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:56:20,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:56:20,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:56:20,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:56:20,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:56:20,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:56:20,737 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:56:20,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:56:20,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:56:20,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:56:20,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:56:20,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:56:20,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:56:20,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:56:20,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:56:20,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:56:20,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:56:20,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:56:20,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:56:20,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:56:20,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:56:20,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:56:20,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:56:20,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:56:20,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:56:20,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:56:20,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:56:20,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:56:20,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:56:20,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:56:20,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:56:20,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 [2022-07-19 14:56:20,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:56:21,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:56:21,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:56:21,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:56:21,021 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:56:21,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2022-07-19 14:56:21,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d32d390/b9555eb18d604c6dae8e3927886d6e89/FLAG486eb18d6 [2022-07-19 14:56:21,481 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:56:21,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2022-07-19 14:56:21,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d32d390/b9555eb18d604c6dae8e3927886d6e89/FLAG486eb18d6 [2022-07-19 14:56:21,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d32d390/b9555eb18d604c6dae8e3927886d6e89 [2022-07-19 14:56:21,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:56:21,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:56:21,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:56:21,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:56:21,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:56:21,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:56:21" (1/1) ... [2022-07-19 14:56:21,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731ec6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:21, skipping insertion in model container [2022-07-19 14:56:21,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:56:21" (1/1) ... [2022-07-19 14:56:21,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:56:21,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:56:22,074 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/loop-acceleration/array_2-2-simple.i[809,822] [2022-07-19 14:56:22,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:56:22,100 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:56:22,112 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/loop-acceleration/array_2-2-simple.i[809,822] [2022-07-19 14:56:22,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:56:22,133 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:56:22,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22 WrapperNode [2022-07-19 14:56:22,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:56:22,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:56:22,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:56:22,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:56:22,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,165 INFO L137 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-07-19 14:56:22,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:56:22,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:56:22,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:56:22,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:56:22,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:56:22,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:56:22,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:56:22,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:56:22,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (1/1) ... [2022-07-19 14:56:22,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:56:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:22,240 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) [2022-07-19 14:56:22,255 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 [2022-07-19 14:56:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:56:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:56:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 14:56:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 14:56:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 14:56:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:56:22,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:56:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 14:56:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:56:22,361 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:56:22,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:56:22,493 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:56:22,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:56:22,498 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 14:56:22,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:56:22 BoogieIcfgContainer [2022-07-19 14:56:22,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:56:22,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:56:22,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:56:22,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:56:22,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:56:21" (1/3) ... [2022-07-19 14:56:22,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f2f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:56:22, skipping insertion in model container [2022-07-19 14:56:22,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:56:22" (2/3) ... [2022-07-19 14:56:22,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5f2f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:56:22, skipping insertion in model container [2022-07-19 14:56:22,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:56:22" (3/3) ... [2022-07-19 14:56:22,511 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2022-07-19 14:56:22,524 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:56:22,525 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:56:22,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:56:22,595 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@39f65326, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24ba4e4a [2022-07-19 14:56:22,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:56:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) 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) [2022-07-19 14:56:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 14:56:22,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:22,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 14:56:22,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-07-19 14:56:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929438850] [2022-07-19 14:56:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929438850] [2022-07-19 14:56:22,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929438850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:56:22,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:56:22,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:56:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015304389] [2022-07-19 14:56:22,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:56:22,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:56:22,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:56:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:56:22,871 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-19 14:56:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:22,902 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-07-19 14:56:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:56:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-07-19 14:56:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:22,917 INFO L225 Difference]: With dead ends: 22 [2022-07-19 14:56:22,917 INFO L226 Difference]: Without dead ends: 10 [2022-07-19 14:56:22,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:56:22,923 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:22,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:56:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-19 14:56:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-07-19 14:56:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-07-19 14:56:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-07-19 14:56:22,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-07-19 14:56:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:22,954 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-07-19 14:56:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-19 14:56:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-07-19 14:56:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 14:56:22,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:22,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:22,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:56:22,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-07-19 14:56:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940911098] [2022-07-19 14:56:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:23,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940911098] [2022-07-19 14:56:23,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940911098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619040746] [2022-07-19 14:56:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:23,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:23,046 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) [2022-07-19 14:56:23,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:56:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 14:56:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619040746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:23,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:23,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 14:56:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572788135] [2022-07-19 14:56:23,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 14:56:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 14:56:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:56:23,186 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-19 14:56:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:23,207 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-07-19 14:56:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 14:56:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) Word has length 8 [2022-07-19 14:56:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:23,208 INFO L225 Difference]: With dead ends: 19 [2022-07-19 14:56:23,209 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 14:56:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:56:23,210 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:23,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:56:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 14:56:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 14:56:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-07-19 14:56:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-07-19 14:56:23,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-07-19 14:56:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:23,215 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-07-19 14:56:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-07-19 14:56:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-07-19 14:56:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 14:56:23,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:23,216 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:23,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:23,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-07-19 14:56:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368528805] [2022-07-19 14:56:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368528805] [2022-07-19 14:56:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368528805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844283407] [2022-07-19 14:56:23,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:56:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:23,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:23,514 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) [2022-07-19 14:56:23,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 14:56:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:56:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 14:56:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:23,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844283407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:23,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:23,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 14:56:23,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803962404] [2022-07-19 14:56:23,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:23,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 14:56:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 14:56:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 14:56:23,678 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-07-19 14:56:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:23,713 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-19 14:56:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 14:56:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2022-07-19 14:56:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:23,715 INFO L225 Difference]: With dead ends: 31 [2022-07-19 14:56:23,715 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 14:56:23,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 14:56:23,717 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:23,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:56:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 14:56:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 14:56:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-07-19 14:56:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-07-19 14:56:23,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-07-19 14:56:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-07-19 14:56:23,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2022-07-19 14:56:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-07-19 14:56:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 14:56:23,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:23,724 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:23,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:23,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 14:56:23,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-07-19 14:56:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:23,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97021160] [2022-07-19 14:56:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:23,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97021160] [2022-07-19 14:56:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97021160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:24,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997858726] [2022-07-19 14:56:24,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 14:56:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:24,128 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) [2022-07-19 14:56:24,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 14:56:24,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-19 14:56:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 14:56:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:24,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997858726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:24,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 14:56:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253514468] [2022-07-19 14:56:24,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 14:56:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 14:56:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 14:56:24,565 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-07-19 14:56:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:24,638 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-19 14:56:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 14:56:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 14:56:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:24,639 INFO L225 Difference]: With dead ends: 55 [2022-07-19 14:56:24,640 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 14:56:24,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 14:56:24,641 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:24,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:56:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 14:56:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-19 14:56:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2022-07-19 14:56:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-07-19 14:56:24,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-07-19 14:56:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:24,649 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-07-19 14:56:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-07-19 14:56:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-07-19 14:56:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 14:56:24,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:24,650 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:24,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:24,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-07-19 14:56:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470026607] [2022-07-19 14:56:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:25,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470026607] [2022-07-19 14:56:25,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470026607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034864005] [2022-07-19 14:56:25,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 14:56:25,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:25,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:25,248 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) [2022-07-19 14:56:25,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 14:56:25,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 14:56:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 14:56:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:25,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034864005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:26,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:26,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-19 14:56:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139412847] [2022-07-19 14:56:26,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 14:56:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 14:56:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 14:56:26,247 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-07-19 14:56:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:26,386 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-07-19 14:56:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 14:56:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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 50 [2022-07-19 14:56:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:26,390 INFO L225 Difference]: With dead ends: 103 [2022-07-19 14:56:26,390 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 14:56:26,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 14:56:26,393 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:26,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 14:56:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 14:56:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-19 14:56:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-07-19 14:56:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-07-19 14:56:26,413 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-07-19 14:56:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:26,413 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-07-19 14:56:26,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 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) [2022-07-19 14:56:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-07-19 14:56:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 14:56:26,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:26,417 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:26,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:26,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-07-19 14:56:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:26,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562492337] [2022-07-19 14:56:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562492337] [2022-07-19 14:56:27,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562492337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571779214] [2022-07-19 14:56:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 14:56:27,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:27,704 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) [2022-07-19 14:56:27,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 14:56:39,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-19 14:56:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:56:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 14:56:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:56:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:40,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:56:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:42,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571779214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:56:42,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:56:42,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-19 14:56:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134462854] [2022-07-19 14:56:42,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:56:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-19 14:56:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:56:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-19 14:56:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 14:56:42,538 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-07-19 14:56:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:56:42,803 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-07-19 14:56:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 14:56:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 98 [2022-07-19 14:56:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:56:42,808 INFO L225 Difference]: With dead ends: 199 [2022-07-19 14:56:42,809 INFO L226 Difference]: Without dead ends: 195 [2022-07-19 14:56:42,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 14:56:42,813 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 14:56:42,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 30 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 14:56:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-19 14:56:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-07-19 14:56:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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) [2022-07-19 14:56:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-07-19 14:56:42,840 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-07-19 14:56:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:56:42,842 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-07-19 14:56:42,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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) [2022-07-19 14:56:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-07-19 14:56:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-19 14:56:42,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:56:42,855 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-07-19 14:56:42,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 14:56:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:43,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:56:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:56:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-07-19 14:56:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:56:43,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717784125] [2022-07-19 14:56:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:56:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:56:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:56:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:56:46,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:56:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717784125] [2022-07-19 14:56:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717784125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:56:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141527729] [2022-07-19 14:56:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 14:56:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:56:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:56:46,148 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) [2022-07-19 14:56:46,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process